/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:43:06,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:43:06,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:43:06,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 21:43:06,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 21:43:06,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 21:43:06,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 21:43:06,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 21:43:06,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 21:43:06,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 21:43:06,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 21:43:06,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 21:43:06,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 21:43:06,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 21:43:06,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 21:43:06,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 21:43:06,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 21:43:06,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 21:43:06,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 21:43:06,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 21:43:06,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 21:43:06,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 21:43:06,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 21:43:06,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 21:43:06,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 21:43:06,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 21:43:06,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 21:43:06,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 21:43:06,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 21:43:06,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-10 21:43:06,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 21:43:06,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 21:43:06,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 21:43:06,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 21:43:06,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 21:43:06,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 21:43:06,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 21:43:06,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 21:43:06,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 21:43:06,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 21:43:06,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 21:43:06,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 21:43:06,384 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:43:06,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:43:06,385 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:43:06,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:43:06,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:43:06,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:43:06,388 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:43:06,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:43:06,389 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:43:06,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:43:06,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:43:06,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:43:06,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:43:06,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:43:06,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:43:06,391 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:43:06,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:43:06,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:43:06,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:43:06,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:43:06,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:43:06,392 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:43:06,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:43:06,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:43:06,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:43:06,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:43:06,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:43:06,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:43:06,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:43:06,393 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:43:06,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:43:06,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:43:06,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:43:06,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:43:06,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:43:06,745 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:43:06,758 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:43:06,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-subst.wvr.bpl [2021-03-10 21:43:06,773 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-subst.wvr.bpl' [2021-03-10 21:43:06,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:43:06,807 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:43:06,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:43:06,809 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:43:06,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:43:06,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:43:06" (1/1) ... [2021-03-10 21:43:06,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:43:06" (1/1) ... [2021-03-10 21:43:06,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:43:06,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:43:06,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:43:06,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:43:06,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:43:06" (1/1) ... [2021-03-10 21:43:06,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:43:06" (1/1) ... [2021-03-10 21:43:06,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:43:06" (1/1) ... [2021-03-10 21:43:06,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:43:06" (1/1) ... [2021-03-10 21:43:06,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:43:06" (1/1) ... [2021-03-10 21:43:06,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:43:06" (1/1) ... [2021-03-10 21:43:06,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:43:06" (1/1) ... [2021-03-10 21:43:06,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:43:06,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:43:06,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:43:06,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:43:06,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:43:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:43:06,940 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:43:06,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:43:06,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:43:06,941 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:43:06,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:43:06,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:43:06,941 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:43:06,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:43:06,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:43:06,942 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 21:43:06,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 21:43:06,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 21:43:06,943 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:43:07,232 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:43:07,232 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-03-10 21:43:07,232 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-10 21:43:07,233 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-03-10 21:43:07,233 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-03-10 21:43:07,234 INFO L202 PluginConnector]: Adding new model array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:43:07 BoogieIcfgContainer [2021-03-10 21:43:07,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:43:07,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:43:07,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:43:07,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:43:07,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:43:06" (1/2) ... [2021-03-10 21:43:07,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559aefd0 and model type array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:43:07, skipping insertion in model container [2021-03-10 21:43:07,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:43:07" (2/2) ... [2021-03-10 21:43:07,240 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-subst.wvr.bpl [2021-03-10 21:43:07,244 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:43:07,245 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:43:07,262 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:43:07,262 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:43:07,324 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 21:43:07,339 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 21:43:07,366 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:43:07,366 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:43:07,366 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:43:07,366 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:43:07,366 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:43:07,366 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:43:07,366 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:43:07,366 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:43:07,380 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 22 transitions, 68 flow [2021-03-10 21:43:07,399 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:07,409 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:07,410 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:07,410 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:07,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:07,419 INFO L82 PathProgramCache]: Analyzing trace with hash -2084068600, now seen corresponding path program 1 times [2021-03-10 21:43:07,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:07,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050019344] [2021-03-10 21:43:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:07,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050019344] [2021-03-10 21:43:07,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:07,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:07,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086121866] [2021-03-10 21:43:07,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:07,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:07,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:07,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:07,645 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:07,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:07,755 INFO L93 Difference]: Finished difference Result 139 states and 379 transitions. [2021-03-10 21:43:07,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:07,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:43:07,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:07,766 INFO L225 Difference]: With dead ends: 139 [2021-03-10 21:43:07,766 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 21:43:07,767 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 21:43:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2021-03-10 21:43:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.819277108433735) internal successors, (234), 83 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 234 transitions. [2021-03-10 21:43:07,804 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 234 transitions. Word has length 14 [2021-03-10 21:43:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:07,805 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 234 transitions. [2021-03-10 21:43:07,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:07,805 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 234 transitions. [2021-03-10 21:43:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:07,807 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:07,807 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:07,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:43:07,807 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:07,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:07,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1063669592, now seen corresponding path program 2 times [2021-03-10 21:43:07,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:07,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986202516] [2021-03-10 21:43:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:07,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986202516] [2021-03-10 21:43:07,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:07,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:07,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509818221] [2021-03-10 21:43:07,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:07,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:07,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:07,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:07,874 INFO L87 Difference]: Start difference. First operand 84 states and 234 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:07,963 INFO L93 Difference]: Finished difference Result 156 states and 429 transitions. [2021-03-10 21:43:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:07,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:43:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:07,965 INFO L225 Difference]: With dead ends: 156 [2021-03-10 21:43:07,965 INFO L226 Difference]: Without dead ends: 152 [2021-03-10 21:43:07,966 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:07,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-03-10 21:43:07,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2021-03-10 21:43:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.831460674157303) internal successors, (252), 89 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 252 transitions. [2021-03-10 21:43:07,976 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 252 transitions. Word has length 14 [2021-03-10 21:43:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:07,977 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 252 transitions. [2021-03-10 21:43:07,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:07,977 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 252 transitions. [2021-03-10 21:43:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:07,978 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:07,978 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:07,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 21:43:07,978 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:07,979 INFO L82 PathProgramCache]: Analyzing trace with hash 284971666, now seen corresponding path program 3 times [2021-03-10 21:43:07,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:07,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979912682] [2021-03-10 21:43:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:08,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979912682] [2021-03-10 21:43:08,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:08,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:08,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156731393] [2021-03-10 21:43:08,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:08,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:08,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:08,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:08,030 INFO L87 Difference]: Start difference. First operand 90 states and 252 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:08,113 INFO L93 Difference]: Finished difference Result 169 states and 467 transitions. [2021-03-10 21:43:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:08,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:43:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:08,115 INFO L225 Difference]: With dead ends: 169 [2021-03-10 21:43:08,115 INFO L226 Difference]: Without dead ends: 165 [2021-03-10 21:43:08,116 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-03-10 21:43:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 94. [2021-03-10 21:43:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.838709677419355) internal successors, (264), 93 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 264 transitions. [2021-03-10 21:43:08,124 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 264 transitions. Word has length 14 [2021-03-10 21:43:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:08,125 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 264 transitions. [2021-03-10 21:43:08,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 264 transitions. [2021-03-10 21:43:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:08,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:08,126 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:08,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:43:08,126 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:08,127 INFO L82 PathProgramCache]: Analyzing trace with hash -791726200, now seen corresponding path program 4 times [2021-03-10 21:43:08,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:08,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205674211] [2021-03-10 21:43:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:08,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205674211] [2021-03-10 21:43:08,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:08,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:08,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365792702] [2021-03-10 21:43:08,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:08,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:08,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:08,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:08,176 INFO L87 Difference]: Start difference. First operand 94 states and 264 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:08,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:08,261 INFO L93 Difference]: Finished difference Result 173 states and 479 transitions. [2021-03-10 21:43:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:08,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:43:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:08,263 INFO L225 Difference]: With dead ends: 173 [2021-03-10 21:43:08,263 INFO L226 Difference]: Without dead ends: 169 [2021-03-10 21:43:08,263 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-03-10 21:43:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-03-10 21:43:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.845360824742268) internal successors, (276), 97 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 276 transitions. [2021-03-10 21:43:08,270 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 276 transitions. Word has length 14 [2021-03-10 21:43:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:08,271 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 276 transitions. [2021-03-10 21:43:08,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 276 transitions. [2021-03-10 21:43:08,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:08,272 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:08,272 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:08,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 21:43:08,272 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:08,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:08,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1403359368, now seen corresponding path program 5 times [2021-03-10 21:43:08,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:08,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425377511] [2021-03-10 21:43:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:08,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425377511] [2021-03-10 21:43:08,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:08,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:08,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081352546] [2021-03-10 21:43:08,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:08,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:08,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:08,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:08,317 INFO L87 Difference]: Start difference. First operand 98 states and 276 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:08,393 INFO L93 Difference]: Finished difference Result 176 states and 489 transitions. [2021-03-10 21:43:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:08,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:43:08,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:08,394 INFO L225 Difference]: With dead ends: 176 [2021-03-10 21:43:08,394 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 21:43:08,395 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:08,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 21:43:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 100. [2021-03-10 21:43:08,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-03-10 21:43:08,400 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-03-10 21:43:08,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:08,401 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-03-10 21:43:08,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-03-10 21:43:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:43:08,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:08,402 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:08,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 21:43:08,402 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:08,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:08,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1756874686, now seen corresponding path program 6 times [2021-03-10 21:43:08,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:08,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240950670] [2021-03-10 21:43:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:08,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240950670] [2021-03-10 21:43:08,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:08,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:43:08,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848663729] [2021-03-10 21:43:08,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:43:08,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:08,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:43:08,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:43:08,444 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:08,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:08,520 INFO L93 Difference]: Finished difference Result 174 states and 483 transitions. [2021-03-10 21:43:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:43:08,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:43:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:08,522 INFO L225 Difference]: With dead ends: 174 [2021-03-10 21:43:08,522 INFO L226 Difference]: Without dead ends: 170 [2021-03-10 21:43:08,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-03-10 21:43:08,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 100. [2021-03-10 21:43:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-03-10 21:43:08,528 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-03-10 21:43:08,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:08,528 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-03-10 21:43:08,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-03-10 21:43:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:08,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:08,529 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:08,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 21:43:08,529 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:08,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:08,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1483038554, now seen corresponding path program 1 times [2021-03-10 21:43:08,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:08,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819448166] [2021-03-10 21:43:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:08,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819448166] [2021-03-10 21:43:08,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368416515] [2021-03-10 21:43:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:08,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:08,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:08,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 21:43:08,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810463651] [2021-03-10 21:43:08,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:08,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:08,848 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:09,358 INFO L93 Difference]: Finished difference Result 239 states and 656 transitions. [2021-03-10 21:43:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:43:09,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:09,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:09,361 INFO L225 Difference]: With dead ends: 239 [2021-03-10 21:43:09,361 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 21:43:09,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:43:09,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 21:43:09,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 123. [2021-03-10 21:43:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.9836065573770494) internal successors, (364), 122 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 364 transitions. [2021-03-10 21:43:09,374 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 364 transitions. Word has length 15 [2021-03-10 21:43:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:09,375 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 364 transitions. [2021-03-10 21:43:09,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 364 transitions. [2021-03-10 21:43:09,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:09,379 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:09,379 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:09,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-10 21:43:09,596 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:09,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:09,596 INFO L82 PathProgramCache]: Analyzing trace with hash -180956976, now seen corresponding path program 1 times [2021-03-10 21:43:09,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:09,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322024475] [2021-03-10 21:43:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:09,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322024475] [2021-03-10 21:43:09,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434278419] [2021-03-10 21:43:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:09,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:09,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:09,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:09,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 21:43:09,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134788376] [2021-03-10 21:43:09,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:09,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:09,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:09,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:09,859 INFO L87 Difference]: Start difference. First operand 123 states and 364 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:10,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:10,609 INFO L93 Difference]: Finished difference Result 257 states and 669 transitions. [2021-03-10 21:43:10,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:43:10,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:10,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:10,610 INFO L225 Difference]: With dead ends: 257 [2021-03-10 21:43:10,611 INFO L226 Difference]: Without dead ends: 187 [2021-03-10 21:43:10,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 591.5ms TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:43:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-03-10 21:43:10,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 133. [2021-03-10 21:43:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.9318181818181817) internal successors, (387), 132 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 387 transitions. [2021-03-10 21:43:10,617 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 387 transitions. Word has length 15 [2021-03-10 21:43:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:10,617 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 387 transitions. [2021-03-10 21:43:10,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:10,617 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 387 transitions. [2021-03-10 21:43:10,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:10,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:10,618 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:10,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:10,839 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:10,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:10,840 INFO L82 PathProgramCache]: Analyzing trace with hash 479848854, now seen corresponding path program 1 times [2021-03-10 21:43:10,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:10,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229680254] [2021-03-10 21:43:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:10,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229680254] [2021-03-10 21:43:10,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325620336] [2021-03-10 21:43:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:10,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:10,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:11,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:11,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:11,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538306464] [2021-03-10 21:43:11,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:11,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:11,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:11,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:11,119 INFO L87 Difference]: Start difference. First operand 133 states and 387 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:11,340 INFO L93 Difference]: Finished difference Result 187 states and 522 transitions. [2021-03-10 21:43:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:11,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:11,342 INFO L225 Difference]: With dead ends: 187 [2021-03-10 21:43:11,342 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 21:43:11,343 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 21:43:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 145. [2021-03-10 21:43:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.9305555555555554) internal successors, (422), 144 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 422 transitions. [2021-03-10 21:43:11,350 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 422 transitions. Word has length 15 [2021-03-10 21:43:11,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:11,351 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 422 transitions. [2021-03-10 21:43:11,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 422 transitions. [2021-03-10 21:43:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:11,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:11,352 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:11,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 21:43:11,563 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:11,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:11,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1061667084, now seen corresponding path program 2 times [2021-03-10 21:43:11,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:11,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235495049] [2021-03-10 21:43:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:11,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235495049] [2021-03-10 21:43:11,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902347112] [2021-03-10 21:43:11,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:11,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:11,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:11,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:11,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:11,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:11,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:11,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272910741] [2021-03-10 21:43:11,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:11,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:11,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:11,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:11,867 INFO L87 Difference]: Start difference. First operand 145 states and 422 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:12,042 INFO L93 Difference]: Finished difference Result 197 states and 554 transitions. [2021-03-10 21:43:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:12,042 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:12,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:12,044 INFO L225 Difference]: With dead ends: 197 [2021-03-10 21:43:12,044 INFO L226 Difference]: Without dead ends: 192 [2021-03-10 21:43:12,044 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:12,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-03-10 21:43:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 147. [2021-03-10 21:43:12,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.952054794520548) internal successors, (431), 146 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 431 transitions. [2021-03-10 21:43:12,050 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 431 transitions. Word has length 15 [2021-03-10 21:43:12,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:12,050 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 431 transitions. [2021-03-10 21:43:12,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:12,050 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 431 transitions. [2021-03-10 21:43:12,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:12,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:12,051 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:12,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 21:43:12,267 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:12,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:12,268 INFO L82 PathProgramCache]: Analyzing trace with hash -667380250, now seen corresponding path program 3 times [2021-03-10 21:43:12,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:12,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563995442] [2021-03-10 21:43:12,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:12,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563995442] [2021-03-10 21:43:12,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030722393] [2021-03-10 21:43:12,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:12,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:12,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:12,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:12,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:12,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:12,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:43:12,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302895048] [2021-03-10 21:43:12,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:43:12,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:12,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:43:12,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:43:12,416 INFO L87 Difference]: Start difference. First operand 147 states and 431 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:12,564 INFO L93 Difference]: Finished difference Result 209 states and 593 transitions. [2021-03-10 21:43:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:12,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:12,566 INFO L225 Difference]: With dead ends: 209 [2021-03-10 21:43:12,566 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:43:12,566 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:12,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:43:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 153. [2021-03-10 21:43:12,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.9539473684210527) internal successors, (449), 152 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:12,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 449 transitions. [2021-03-10 21:43:12,572 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 449 transitions. Word has length 15 [2021-03-10 21:43:12,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:12,572 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 449 transitions. [2021-03-10 21:43:12,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 449 transitions. [2021-03-10 21:43:12,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:12,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:12,573 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:12,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 21:43:12,787 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:12,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:12,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1754797532, now seen corresponding path program 4 times [2021-03-10 21:43:12,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:12,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628047800] [2021-03-10 21:43:12,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:12,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628047800] [2021-03-10 21:43:12,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151533552] [2021-03-10 21:43:12,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:12,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:12,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:12,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:12,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:13,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:13,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:13,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402116544] [2021-03-10 21:43:13,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:13,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:13,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:13,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:13,046 INFO L87 Difference]: Start difference. First operand 153 states and 449 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:13,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:13,332 INFO L93 Difference]: Finished difference Result 276 states and 751 transitions. [2021-03-10 21:43:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:13,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:13,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:13,334 INFO L225 Difference]: With dead ends: 276 [2021-03-10 21:43:13,334 INFO L226 Difference]: Without dead ends: 271 [2021-03-10 21:43:13,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 262.9ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:13,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-03-10 21:43:13,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 158. [2021-03-10 21:43:13,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.9872611464968153) internal successors, (469), 157 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:13,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 469 transitions. [2021-03-10 21:43:13,341 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 469 transitions. Word has length 15 [2021-03-10 21:43:13,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:13,341 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 469 transitions. [2021-03-10 21:43:13,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 469 transitions. [2021-03-10 21:43:13,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:13,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:13,344 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:13,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:13,545 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:13,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1958351534, now seen corresponding path program 5 times [2021-03-10 21:43:13,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:13,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365879634] [2021-03-10 21:43:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:13,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365879634] [2021-03-10 21:43:13,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989026281] [2021-03-10 21:43:13,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:13,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:13,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:13,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:13,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:13,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:13,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:13,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922420520] [2021-03-10 21:43:13,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:13,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:13,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:13,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:13,810 INFO L87 Difference]: Start difference. First operand 158 states and 469 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:14,061 INFO L93 Difference]: Finished difference Result 276 states and 772 transitions. [2021-03-10 21:43:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:14,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:14,064 INFO L225 Difference]: With dead ends: 276 [2021-03-10 21:43:14,064 INFO L226 Difference]: Without dead ends: 271 [2021-03-10 21:43:14,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:14,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-03-10 21:43:14,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 153. [2021-03-10 21:43:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.9539473684210527) internal successors, (449), 152 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 449 transitions. [2021-03-10 21:43:14,078 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 449 transitions. Word has length 15 [2021-03-10 21:43:14,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:14,078 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 449 transitions. [2021-03-10 21:43:14,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 449 transitions. [2021-03-10 21:43:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:14,080 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:14,080 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:14,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 21:43:14,303 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:14,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:14,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1013363858, now seen corresponding path program 6 times [2021-03-10 21:43:14,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:14,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110484546] [2021-03-10 21:43:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:14,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110484546] [2021-03-10 21:43:14,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133558404] [2021-03-10 21:43:14,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:14,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:43:14,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:14,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:43:14,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:14,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:14,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:14,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157959357] [2021-03-10 21:43:14,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:14,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:14,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:14,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:14,566 INFO L87 Difference]: Start difference. First operand 153 states and 449 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:15,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:15,382 INFO L93 Difference]: Finished difference Result 275 states and 748 transitions. [2021-03-10 21:43:15,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:43:15,382 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:15,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:15,384 INFO L225 Difference]: With dead ends: 275 [2021-03-10 21:43:15,384 INFO L226 Difference]: Without dead ends: 270 [2021-03-10 21:43:15,384 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 661.5ms TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:43:15,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-03-10 21:43:15,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 153. [2021-03-10 21:43:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.9539473684210527) internal successors, (449), 152 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 449 transitions. [2021-03-10 21:43:15,390 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 449 transitions. Word has length 15 [2021-03-10 21:43:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:15,390 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 449 transitions. [2021-03-10 21:43:15,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 449 transitions. [2021-03-10 21:43:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:15,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:15,391 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:15,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 21:43:15,611 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:15,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:15,612 INFO L82 PathProgramCache]: Analyzing trace with hash 261780050, now seen corresponding path program 7 times [2021-03-10 21:43:15,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:15,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890697073] [2021-03-10 21:43:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:15,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890697073] [2021-03-10 21:43:15,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422439142] [2021-03-10 21:43:15,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:15,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:15,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:15,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:15,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:15,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293618001] [2021-03-10 21:43:15,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:15,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:15,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:15,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:15,811 INFO L87 Difference]: Start difference. First operand 153 states and 449 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:16,081 INFO L93 Difference]: Finished difference Result 206 states and 576 transitions. [2021-03-10 21:43:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:16,082 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:43:16,082 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 21:43:16,083 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:16,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 21:43:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 154. [2021-03-10 21:43:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.947712418300654) internal successors, (451), 153 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 451 transitions. [2021-03-10 21:43:16,088 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 451 transitions. Word has length 15 [2021-03-10 21:43:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:16,088 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 451 transitions. [2021-03-10 21:43:16,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 451 transitions. [2021-03-10 21:43:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:16,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:16,089 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:16,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 21:43:16,311 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:16,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:16,312 INFO L82 PathProgramCache]: Analyzing trace with hash 970590554, now seen corresponding path program 2 times [2021-03-10 21:43:16,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:16,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530083653] [2021-03-10 21:43:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:16,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530083653] [2021-03-10 21:43:16,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531274690] [2021-03-10 21:43:16,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:16,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:16,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:16,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:16,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:16,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:16,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 21:43:16,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694807463] [2021-03-10 21:43:16,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:16,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:16,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:16,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:16,495 INFO L87 Difference]: Start difference. First operand 154 states and 451 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:16,925 INFO L93 Difference]: Finished difference Result 315 states and 839 transitions. [2021-03-10 21:43:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:43:16,925 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:16,927 INFO L225 Difference]: With dead ends: 315 [2021-03-10 21:43:16,927 INFO L226 Difference]: Without dead ends: 273 [2021-03-10 21:43:16,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:43:16,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-03-10 21:43:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 168. [2021-03-10 21:43:16,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.0479041916167664) internal successors, (509), 167 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 509 transitions. [2021-03-10 21:43:16,934 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 509 transitions. Word has length 15 [2021-03-10 21:43:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:16,934 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 509 transitions. [2021-03-10 21:43:16,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 509 transitions. [2021-03-10 21:43:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:16,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:16,935 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:17,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:17,139 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:17,140 INFO L82 PathProgramCache]: Analyzing trace with hash 511164902, now seen corresponding path program 8 times [2021-03-10 21:43:17,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:17,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415086948] [2021-03-10 21:43:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:17,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415086948] [2021-03-10 21:43:17,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074436717] [2021-03-10 21:43:17,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:17,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:17,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:17,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:17,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:17,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:17,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:17,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448724719] [2021-03-10 21:43:17,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:17,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:17,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:17,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:17,407 INFO L87 Difference]: Start difference. First operand 168 states and 509 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:17,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:17,684 INFO L93 Difference]: Finished difference Result 259 states and 742 transitions. [2021-03-10 21:43:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:17,684 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:17,685 INFO L225 Difference]: With dead ends: 259 [2021-03-10 21:43:17,685 INFO L226 Difference]: Without dead ends: 254 [2021-03-10 21:43:17,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:17,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-03-10 21:43:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 170. [2021-03-10 21:43:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 3.059171597633136) internal successors, (517), 169 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 517 transitions. [2021-03-10 21:43:17,692 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 517 transitions. Word has length 15 [2021-03-10 21:43:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:17,692 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 517 transitions. [2021-03-10 21:43:17,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 517 transitions. [2021-03-10 21:43:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:17,693 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:17,693 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:17,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 21:43:17,915 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:17,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:17,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1191223272, now seen corresponding path program 2 times [2021-03-10 21:43:17,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:17,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791520410] [2021-03-10 21:43:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:17,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791520410] [2021-03-10 21:43:17,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917985982] [2021-03-10 21:43:17,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:17,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:17,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:17,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:17,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:18,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:18,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 21:43:18,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898377046] [2021-03-10 21:43:18,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:18,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:18,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:18,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:18,071 INFO L87 Difference]: Start difference. First operand 170 states and 517 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:18,337 INFO L93 Difference]: Finished difference Result 263 states and 728 transitions. [2021-03-10 21:43:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:18,338 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:18,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:18,339 INFO L225 Difference]: With dead ends: 263 [2021-03-10 21:43:18,339 INFO L226 Difference]: Without dead ends: 236 [2021-03-10 21:43:18,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:18,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-03-10 21:43:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 170. [2021-03-10 21:43:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 3.029585798816568) internal successors, (512), 169 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 512 transitions. [2021-03-10 21:43:18,345 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 512 transitions. Word has length 15 [2021-03-10 21:43:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:18,345 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 512 transitions. [2021-03-10 21:43:18,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:18,345 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 512 transitions. [2021-03-10 21:43:18,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:18,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:18,346 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:18,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 21:43:18,560 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1872721008, now seen corresponding path program 9 times [2021-03-10 21:43:18,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:18,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885018076] [2021-03-10 21:43:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885018076] [2021-03-10 21:43:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306914597] [2021-03-10 21:43:18,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:18,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:18,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:18,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:18,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:18,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:18,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:18,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488020438] [2021-03-10 21:43:18,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:18,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:18,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:18,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:18,822 INFO L87 Difference]: Start difference. First operand 170 states and 512 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:19,104 INFO L93 Difference]: Finished difference Result 230 states and 654 transitions. [2021-03-10 21:43:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:19,104 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:19,105 INFO L225 Difference]: With dead ends: 230 [2021-03-10 21:43:19,105 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 21:43:19,105 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 21:43:19,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 170. [2021-03-10 21:43:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 3.0236686390532546) internal successors, (511), 169 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 511 transitions. [2021-03-10 21:43:19,111 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 511 transitions. Word has length 15 [2021-03-10 21:43:19,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:19,111 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 511 transitions. [2021-03-10 21:43:19,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:19,112 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 511 transitions. [2021-03-10 21:43:19,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:19,112 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:19,112 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:19,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-03-10 21:43:19,315 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:19,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:19,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1743627284, now seen corresponding path program 3 times [2021-03-10 21:43:19,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:19,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605984616] [2021-03-10 21:43:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:19,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605984616] [2021-03-10 21:43:19,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294974745] [2021-03-10 21:43:19,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:19,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:19,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:19,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:19,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:19,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:19,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 21:43:19,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935539451] [2021-03-10 21:43:19,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:19,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:19,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:19,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:19,482 INFO L87 Difference]: Start difference. First operand 170 states and 511 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:19,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:19,837 INFO L93 Difference]: Finished difference Result 284 states and 758 transitions. [2021-03-10 21:43:19,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:43:19,837 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:19,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:19,838 INFO L225 Difference]: With dead ends: 284 [2021-03-10 21:43:19,839 INFO L226 Difference]: Without dead ends: 247 [2021-03-10 21:43:19,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:19,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-03-10 21:43:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 159. [2021-03-10 21:43:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.0) internal successors, (474), 158 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 474 transitions. [2021-03-10 21:43:19,844 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 474 transitions. Word has length 15 [2021-03-10 21:43:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:19,844 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 474 transitions. [2021-03-10 21:43:19,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 474 transitions. [2021-03-10 21:43:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:19,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:19,845 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:20,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:20,059 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:20,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:20,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1421782062, now seen corresponding path program 10 times [2021-03-10 21:43:20,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:20,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792469662] [2021-03-10 21:43:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:20,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792469662] [2021-03-10 21:43:20,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070596827] [2021-03-10 21:43:20,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:43:20,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:20,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:20,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:20,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:20,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:20,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:43:20,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37121443] [2021-03-10 21:43:20,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:20,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:20,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:20,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:20,230 INFO L87 Difference]: Start difference. First operand 159 states and 474 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:20,378 INFO L93 Difference]: Finished difference Result 254 states and 734 transitions. [2021-03-10 21:43:20,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:20,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:20,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:20,381 INFO L225 Difference]: With dead ends: 254 [2021-03-10 21:43:20,381 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 21:43:20,381 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:20,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 21:43:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 161. [2021-03-10 21:43:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.0) internal successors, (480), 160 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 480 transitions. [2021-03-10 21:43:20,385 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 480 transitions. Word has length 15 [2021-03-10 21:43:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:20,386 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 480 transitions. [2021-03-10 21:43:20,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:20,386 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 480 transitions. [2021-03-10 21:43:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:20,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:20,386 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:20,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:20,599 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:20,599 INFO L82 PathProgramCache]: Analyzing trace with hash 4818636, now seen corresponding path program 11 times [2021-03-10 21:43:20,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:20,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409551520] [2021-03-10 21:43:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:20,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409551520] [2021-03-10 21:43:20,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997771926] [2021-03-10 21:43:20,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:20,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:20,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:20,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:20,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:20,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:20,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:20,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078439398] [2021-03-10 21:43:20,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:20,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:20,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:20,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:20,754 INFO L87 Difference]: Start difference. First operand 161 states and 480 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:20,873 INFO L93 Difference]: Finished difference Result 244 states and 694 transitions. [2021-03-10 21:43:20,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:20,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:20,875 INFO L225 Difference]: With dead ends: 244 [2021-03-10 21:43:20,875 INFO L226 Difference]: Without dead ends: 239 [2021-03-10 21:43:20,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-03-10 21:43:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2021-03-10 21:43:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.0123456790123457) internal successors, (488), 162 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 488 transitions. [2021-03-10 21:43:20,881 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 488 transitions. Word has length 15 [2021-03-10 21:43:20,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:20,881 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 488 transitions. [2021-03-10 21:43:20,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 488 transitions. [2021-03-10 21:43:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:20,882 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:20,882 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:21,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:21,087 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:21,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1366374742, now seen corresponding path program 12 times [2021-03-10 21:43:21,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:21,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503517284] [2021-03-10 21:43:21,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:21,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503517284] [2021-03-10 21:43:21,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149673307] [2021-03-10 21:43:21,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:21,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:43:21,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:21,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:21,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:21,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:21,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:21,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296108606] [2021-03-10 21:43:21,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:21,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:21,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:21,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:21,255 INFO L87 Difference]: Start difference. First operand 163 states and 488 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:21,392 INFO L93 Difference]: Finished difference Result 217 states and 622 transitions. [2021-03-10 21:43:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:21,392 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:21,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:21,394 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:43:21,394 INFO L226 Difference]: Without dead ends: 211 [2021-03-10 21:43:21,394 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-10 21:43:21,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 161. [2021-03-10 21:43:21,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.0) internal successors, (480), 160 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 480 transitions. [2021-03-10 21:43:21,398 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 480 transitions. Word has length 15 [2021-03-10 21:43:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:21,398 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 480 transitions. [2021-03-10 21:43:21,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 480 transitions. [2021-03-10 21:43:21,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:21,399 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:21,399 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:21,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:21,615 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:21,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:21,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1908842768, now seen corresponding path program 3 times [2021-03-10 21:43:21,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:21,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851507208] [2021-03-10 21:43:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:21,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851507208] [2021-03-10 21:43:21,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972505524] [2021-03-10 21:43:21,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:21,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:21,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:21,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:21,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:21,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:21,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-03-10 21:43:21,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150251461] [2021-03-10 21:43:21,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:21,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:21,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:21,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:21,760 INFO L87 Difference]: Start difference. First operand 161 states and 480 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:22,001 INFO L93 Difference]: Finished difference Result 274 states and 770 transitions. [2021-03-10 21:43:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:43:22,001 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:22,003 INFO L225 Difference]: With dead ends: 274 [2021-03-10 21:43:22,003 INFO L226 Difference]: Without dead ends: 221 [2021-03-10 21:43:22,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 192.1ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:43:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-03-10 21:43:22,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 158. [2021-03-10 21:43:22,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.9872611464968153) internal successors, (469), 157 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 469 transitions. [2021-03-10 21:43:22,008 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 469 transitions. Word has length 15 [2021-03-10 21:43:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:22,008 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 469 transitions. [2021-03-10 21:43:22,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:22,008 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 469 transitions. [2021-03-10 21:43:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:22,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:22,009 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:22,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-03-10 21:43:22,220 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:22,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:22,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1057034826, now seen corresponding path program 13 times [2021-03-10 21:43:22,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:22,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074859027] [2021-03-10 21:43:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074859027] [2021-03-10 21:43:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914049179] [2021-03-10 21:43:22,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:22,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:22,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:22,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:22,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:22,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434302544] [2021-03-10 21:43:22,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:22,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:22,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:22,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:22,435 INFO L87 Difference]: Start difference. First operand 158 states and 469 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:22,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:22,665 INFO L93 Difference]: Finished difference Result 270 states and 738 transitions. [2021-03-10 21:43:22,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:22,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:22,667 INFO L225 Difference]: With dead ends: 270 [2021-03-10 21:43:22,667 INFO L226 Difference]: Without dead ends: 265 [2021-03-10 21:43:22,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-03-10 21:43:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 163. [2021-03-10 21:43:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.0185185185185186) internal successors, (489), 162 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 489 transitions. [2021-03-10 21:43:22,673 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 489 transitions. Word has length 15 [2021-03-10 21:43:22,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:22,673 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 489 transitions. [2021-03-10 21:43:22,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:22,673 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 489 transitions. [2021-03-10 21:43:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:22,673 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:22,673 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:22,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 21:43:22,891 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:22,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:22,891 INFO L82 PathProgramCache]: Analyzing trace with hash -475216596, now seen corresponding path program 14 times [2021-03-10 21:43:22,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:22,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422803222] [2021-03-10 21:43:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:22,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422803222] [2021-03-10 21:43:22,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464297436] [2021-03-10 21:43:22,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:43:23,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:23,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:23,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:23,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:23,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:23,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:23,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800395600] [2021-03-10 21:43:23,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:23,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:23,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:23,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:23,137 INFO L87 Difference]: Start difference. First operand 163 states and 489 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:23,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:23,402 INFO L93 Difference]: Finished difference Result 280 states and 770 transitions. [2021-03-10 21:43:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:23,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:23,404 INFO L225 Difference]: With dead ends: 280 [2021-03-10 21:43:23,404 INFO L226 Difference]: Without dead ends: 275 [2021-03-10 21:43:23,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:23,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-03-10 21:43:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 158. [2021-03-10 21:43:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.9872611464968153) internal successors, (469), 157 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 469 transitions. [2021-03-10 21:43:23,416 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 469 transitions. Word has length 15 [2021-03-10 21:43:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:23,416 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 469 transitions. [2021-03-10 21:43:23,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 469 transitions. [2021-03-10 21:43:23,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:23,419 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:23,419 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:23,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-03-10 21:43:23,639 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:23,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1798468500, now seen corresponding path program 15 times [2021-03-10 21:43:23,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:23,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926501576] [2021-03-10 21:43:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:23,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926501576] [2021-03-10 21:43:23,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155781377] [2021-03-10 21:43:23,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:23,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:23,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:23,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:23,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:23,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:23,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:23,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73722442] [2021-03-10 21:43:23,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:23,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:23,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:23,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:23,821 INFO L87 Difference]: Start difference. First operand 158 states and 469 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:24,115 INFO L93 Difference]: Finished difference Result 305 states and 819 transitions. [2021-03-10 21:43:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:24,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:24,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:24,117 INFO L225 Difference]: With dead ends: 305 [2021-03-10 21:43:24,117 INFO L226 Difference]: Without dead ends: 300 [2021-03-10 21:43:24,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-03-10 21:43:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 160. [2021-03-10 21:43:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.9748427672955975) internal successors, (473), 159 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 473 transitions. [2021-03-10 21:43:24,122 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 473 transitions. Word has length 15 [2021-03-10 21:43:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:24,122 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 473 transitions. [2021-03-10 21:43:24,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 473 transitions. [2021-03-10 21:43:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:24,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:24,123 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:24,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-03-10 21:43:24,345 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:24,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1744914988, now seen corresponding path program 16 times [2021-03-10 21:43:24,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:24,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563468205] [2021-03-10 21:43:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:24,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563468205] [2021-03-10 21:43:24,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710534353] [2021-03-10 21:43:24,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:24,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:24,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:24,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:24,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:24,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:24,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:24,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581879602] [2021-03-10 21:43:24,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:24,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:24,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:24,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:24,559 INFO L87 Difference]: Start difference. First operand 160 states and 473 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:24,907 INFO L93 Difference]: Finished difference Result 284 states and 780 transitions. [2021-03-10 21:43:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:24,908 INFO L225 Difference]: With dead ends: 284 [2021-03-10 21:43:24,908 INFO L226 Difference]: Without dead ends: 278 [2021-03-10 21:43:24,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:24,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-03-10 21:43:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 158. [2021-03-10 21:43:24,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.9872611464968153) internal successors, (469), 157 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 469 transitions. [2021-03-10 21:43:24,914 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 469 transitions. Word has length 15 [2021-03-10 21:43:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:24,914 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 469 transitions. [2021-03-10 21:43:24,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 469 transitions. [2021-03-10 21:43:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:24,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:24,914 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:25,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:25,127 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:25,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:25,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1994299840, now seen corresponding path program 17 times [2021-03-10 21:43:25,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:25,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564217708] [2021-03-10 21:43:25,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:25,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564217708] [2021-03-10 21:43:25,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950925253] [2021-03-10 21:43:25,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:25,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:25,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:25,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:25,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:25,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:25,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:25,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100715020] [2021-03-10 21:43:25,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:25,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:25,343 INFO L87 Difference]: Start difference. First operand 158 states and 469 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:25,574 INFO L93 Difference]: Finished difference Result 306 states and 841 transitions. [2021-03-10 21:43:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:25,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:25,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:25,576 INFO L225 Difference]: With dead ends: 306 [2021-03-10 21:43:25,576 INFO L226 Difference]: Without dead ends: 301 [2021-03-10 21:43:25,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 247.2ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:25,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-03-10 21:43:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 159. [2021-03-10 21:43:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.9873417721518987) internal successors, (472), 158 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 472 transitions. [2021-03-10 21:43:25,581 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 472 transitions. Word has length 15 [2021-03-10 21:43:25,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:25,581 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 472 transitions. [2021-03-10 21:43:25,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 472 transitions. [2021-03-10 21:43:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:25,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:25,582 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:25,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:25,801 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:25,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:25,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1620609086, now seen corresponding path program 4 times [2021-03-10 21:43:25,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:25,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403082602] [2021-03-10 21:43:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:25,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403082602] [2021-03-10 21:43:25,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789327811] [2021-03-10 21:43:25,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:25,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:25,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:25,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:25,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:25,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:25,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-03-10 21:43:25,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330444017] [2021-03-10 21:43:25,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:25,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:25,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:25,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:25,938 INFO L87 Difference]: Start difference. First operand 159 states and 472 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:26,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:26,169 INFO L93 Difference]: Finished difference Result 251 states and 682 transitions. [2021-03-10 21:43:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:43:26,169 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:26,170 INFO L225 Difference]: With dead ends: 251 [2021-03-10 21:43:26,170 INFO L226 Difference]: Without dead ends: 229 [2021-03-10 21:43:26,171 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-03-10 21:43:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 155. [2021-03-10 21:43:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.9415584415584415) internal successors, (453), 154 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 453 transitions. [2021-03-10 21:43:26,174 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 453 transitions. Word has length 15 [2021-03-10 21:43:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:26,175 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 453 transitions. [2021-03-10 21:43:26,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 453 transitions. [2021-03-10 21:43:26,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:26,175 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:26,175 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:26,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:26,391 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:26,391 INFO L82 PathProgramCache]: Analyzing trace with hash -939111350, now seen corresponding path program 18 times [2021-03-10 21:43:26,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:26,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147705622] [2021-03-10 21:43:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:26,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147705622] [2021-03-10 21:43:26,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962837103] [2021-03-10 21:43:26,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:26,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:43:26,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:26,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:26,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:26,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:26,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:26,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334686260] [2021-03-10 21:43:26,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:26,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:26,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:26,595 INFO L87 Difference]: Start difference. First operand 155 states and 453 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:26,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:26,890 INFO L93 Difference]: Finished difference Result 284 states and 778 transitions. [2021-03-10 21:43:26,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:26,890 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:26,891 INFO L225 Difference]: With dead ends: 284 [2021-03-10 21:43:26,891 INFO L226 Difference]: Without dead ends: 278 [2021-03-10 21:43:26,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:26,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-03-10 21:43:26,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 151. [2021-03-10 21:43:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.9133333333333336) internal successors, (437), 150 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 437 transitions. [2021-03-10 21:43:26,896 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 437 transitions. Word has length 15 [2021-03-10 21:43:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:26,896 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 437 transitions. [2021-03-10 21:43:26,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 437 transitions. [2021-03-10 21:43:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:26,897 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:26,897 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:27,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 21:43:27,115 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:27,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:27,115 INFO L82 PathProgramCache]: Analyzing trace with hash 738121340, now seen corresponding path program 5 times [2021-03-10 21:43:27,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:27,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861244732] [2021-03-10 21:43:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:27,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861244732] [2021-03-10 21:43:27,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470534635] [2021-03-10 21:43:27,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:27,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:27,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:27,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:43:27,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:27,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:27,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:43:27,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190756870] [2021-03-10 21:43:27,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:43:27,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:27,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:43:27,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:43:27,248 INFO L87 Difference]: Start difference. First operand 151 states and 437 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:27,367 INFO L93 Difference]: Finished difference Result 221 states and 607 transitions. [2021-03-10 21:43:27,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:27,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:27,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:27,372 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:43:27,372 INFO L226 Difference]: Without dead ends: 203 [2021-03-10 21:43:27,373 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-03-10 21:43:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 133. [2021-03-10 21:43:27,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.9393939393939394) internal successors, (388), 132 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 388 transitions. [2021-03-10 21:43:27,376 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 388 transitions. Word has length 15 [2021-03-10 21:43:27,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:27,377 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 388 transitions. [2021-03-10 21:43:27,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:27,377 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 388 transitions. [2021-03-10 21:43:27,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:27,377 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:27,377 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:27,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-10 21:43:27,588 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:27,588 INFO L82 PathProgramCache]: Analyzing trace with hash -338576526, now seen corresponding path program 6 times [2021-03-10 21:43:27,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:27,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38227078] [2021-03-10 21:43:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:27,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38227078] [2021-03-10 21:43:27,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726346396] [2021-03-10 21:43:27,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:27,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:43:27,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:27,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:27,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:27,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:27,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-03-10 21:43:27,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134139116] [2021-03-10 21:43:27,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:27,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:27,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:27,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:27,703 INFO L87 Difference]: Start difference. First operand 133 states and 388 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:27,946 INFO L93 Difference]: Finished difference Result 237 states and 658 transitions. [2021-03-10 21:43:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:43:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:27,947 INFO L225 Difference]: With dead ends: 237 [2021-03-10 21:43:27,947 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 21:43:27,947 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 21:43:27,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 135. [2021-03-10 21:43:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.955223880597015) internal successors, (396), 134 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:27,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 396 transitions. [2021-03-10 21:43:27,951 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 396 transitions. Word has length 15 [2021-03-10 21:43:27,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:27,951 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 396 transitions. [2021-03-10 21:43:27,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 396 transitions. [2021-03-10 21:43:27,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:27,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:27,951 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:28,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-10 21:43:28,167 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:28,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1210723178, now seen corresponding path program 19 times [2021-03-10 21:43:28,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:28,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891129827] [2021-03-10 21:43:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:28,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891129827] [2021-03-10 21:43:28,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63568379] [2021-03-10 21:43:28,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:28,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:28,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:28,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:28,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:28,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033918369] [2021-03-10 21:43:28,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:28,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:28,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:28,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:28,361 INFO L87 Difference]: Start difference. First operand 135 states and 396 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:28,586 INFO L93 Difference]: Finished difference Result 203 states and 539 transitions. [2021-03-10 21:43:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:28,586 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:28,587 INFO L225 Difference]: With dead ends: 203 [2021-03-10 21:43:28,587 INFO L226 Difference]: Without dead ends: 198 [2021-03-10 21:43:28,587 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:28,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-03-10 21:43:28,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 137. [2021-03-10 21:43:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.9411764705882355) internal successors, (400), 136 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 400 transitions. [2021-03-10 21:43:28,590 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 400 transitions. Word has length 15 [2021-03-10 21:43:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:28,590 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 400 transitions. [2021-03-10 21:43:28,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 400 transitions. [2021-03-10 21:43:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:28,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:28,590 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:28,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:28,795 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:28,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:28,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1962306986, now seen corresponding path program 20 times [2021-03-10 21:43:28,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:28,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712051731] [2021-03-10 21:43:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:28,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712051731] [2021-03-10 21:43:28,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084299903] [2021-03-10 21:43:28,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:28,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:28,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:28,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:28,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:29,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:29,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:29,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876110806] [2021-03-10 21:43:29,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:29,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:29,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:29,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:29,003 INFO L87 Difference]: Start difference. First operand 137 states and 400 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:29,270 INFO L93 Difference]: Finished difference Result 202 states and 540 transitions. [2021-03-10 21:43:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:29,271 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:29,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:29,272 INFO L225 Difference]: With dead ends: 202 [2021-03-10 21:43:29,272 INFO L226 Difference]: Without dead ends: 196 [2021-03-10 21:43:29,272 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:43:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-03-10 21:43:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 135. [2021-03-10 21:43:29,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.955223880597015) internal successors, (396), 134 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 396 transitions. [2021-03-10 21:43:29,275 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 396 transitions. Word has length 15 [2021-03-10 21:43:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:29,275 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 396 transitions. [2021-03-10 21:43:29,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 396 transitions. [2021-03-10 21:43:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:29,276 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:29,276 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:29,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-10 21:43:29,487 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:29,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:29,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1226951760, now seen corresponding path program 4 times [2021-03-10 21:43:29,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:29,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505094747] [2021-03-10 21:43:29,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:29,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505094747] [2021-03-10 21:43:29,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969171821] [2021-03-10 21:43:29,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:29,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:29,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:29,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:43:29,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:29,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:29,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:43:29,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659773144] [2021-03-10 21:43:29,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:29,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:29,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:29,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:29,609 INFO L87 Difference]: Start difference. First operand 135 states and 396 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:29,730 INFO L93 Difference]: Finished difference Result 205 states and 542 transitions. [2021-03-10 21:43:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:29,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:29,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:29,731 INFO L225 Difference]: With dead ends: 205 [2021-03-10 21:43:29,732 INFO L226 Difference]: Without dead ends: 195 [2021-03-10 21:43:29,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-03-10 21:43:29,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 141. [2021-03-10 21:43:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.9357142857142855) internal successors, (411), 140 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:29,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 411 transitions. [2021-03-10 21:43:29,736 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 411 transitions. Word has length 15 [2021-03-10 21:43:29,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:29,736 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 411 transitions. [2021-03-10 21:43:29,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:29,736 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 411 transitions. [2021-03-10 21:43:29,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:29,736 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:29,736 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:29,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:29,951 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:29,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:29,951 INFO L82 PathProgramCache]: Analyzing trace with hash -886595830, now seen corresponding path program 21 times [2021-03-10 21:43:29,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:29,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838672372] [2021-03-10 21:43:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:30,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838672372] [2021-03-10 21:43:30,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271554090] [2021-03-10 21:43:30,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:30,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:30,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:30,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:30,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:30,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:30,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:30,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813109999] [2021-03-10 21:43:30,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:30,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:30,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:30,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:30,134 INFO L87 Difference]: Start difference. First operand 141 states and 411 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:30,348 INFO L93 Difference]: Finished difference Result 181 states and 502 transitions. [2021-03-10 21:43:30,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:30,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:30,351 INFO L225 Difference]: With dead ends: 181 [2021-03-10 21:43:30,351 INFO L226 Difference]: Without dead ends: 174 [2021-03-10 21:43:30,351 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-03-10 21:43:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 141. [2021-03-10 21:43:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.9285714285714284) internal successors, (410), 140 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 410 transitions. [2021-03-10 21:43:30,353 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 410 transitions. Word has length 15 [2021-03-10 21:43:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:30,354 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 410 transitions. [2021-03-10 21:43:30,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 410 transitions. [2021-03-10 21:43:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:30,354 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:30,354 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:30,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-03-10 21:43:30,567 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:30,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:30,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1651983020, now seen corresponding path program 5 times [2021-03-10 21:43:30,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:30,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150274241] [2021-03-10 21:43:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:30,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150274241] [2021-03-10 21:43:30,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021117348] [2021-03-10 21:43:30,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:30,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:30,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:30,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:43:30,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:30,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:30,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:43:30,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945872782] [2021-03-10 21:43:30,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:30,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:30,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:30,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:30,676 INFO L87 Difference]: Start difference. First operand 141 states and 410 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:30,826 INFO L93 Difference]: Finished difference Result 190 states and 512 transitions. [2021-03-10 21:43:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:30,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:30,827 INFO L225 Difference]: With dead ends: 190 [2021-03-10 21:43:30,827 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 21:43:30,827 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:30,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 21:43:30,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-03-10 21:43:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.948148148148148) internal successors, (398), 135 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 398 transitions. [2021-03-10 21:43:30,831 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 398 transitions. Word has length 15 [2021-03-10 21:43:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:30,832 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 398 transitions. [2021-03-10 21:43:30,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 398 transitions. [2021-03-10 21:43:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:30,832 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:30,832 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:31,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-03-10 21:43:31,039 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:31,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:31,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1441032960, now seen corresponding path program 6 times [2021-03-10 21:43:31,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:31,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370611505] [2021-03-10 21:43:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:31,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370611505] [2021-03-10 21:43:31,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409813445] [2021-03-10 21:43:31,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:31,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:43:31,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:31,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:31,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:31,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:31,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 21:43:31,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888797355] [2021-03-10 21:43:31,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:31,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:31,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:31,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:31,173 INFO L87 Difference]: Start difference. First operand 136 states and 398 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:31,523 INFO L93 Difference]: Finished difference Result 214 states and 572 transitions. [2021-03-10 21:43:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:43:31,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:31,525 INFO L225 Difference]: With dead ends: 214 [2021-03-10 21:43:31,525 INFO L226 Difference]: Without dead ends: 189 [2021-03-10 21:43:31,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:43:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-03-10 21:43:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 137. [2021-03-10 21:43:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.8970588235294117) internal successors, (394), 136 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 394 transitions. [2021-03-10 21:43:31,528 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 394 transitions. Word has length 15 [2021-03-10 21:43:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:31,528 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 394 transitions. [2021-03-10 21:43:31,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 394 transitions. [2021-03-10 21:43:31,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:31,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:31,529 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:31,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-10 21:43:31,739 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:31,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:31,739 INFO L82 PathProgramCache]: Analyzing trace with hash 981607308, now seen corresponding path program 22 times [2021-03-10 21:43:31,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:31,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409692272] [2021-03-10 21:43:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:31,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409692272] [2021-03-10 21:43:31,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969370121] [2021-03-10 21:43:31,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:43:31,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:31,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:31,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:31,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:31,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:31,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:31,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621181363] [2021-03-10 21:43:31,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:31,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:31,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:31,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:31,951 INFO L87 Difference]: Start difference. First operand 137 states and 394 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:32,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:32,203 INFO L93 Difference]: Finished difference Result 214 states and 591 transitions. [2021-03-10 21:43:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:32,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:32,204 INFO L225 Difference]: With dead ends: 214 [2021-03-10 21:43:32,204 INFO L226 Difference]: Without dead ends: 209 [2021-03-10 21:43:32,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 223.6ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-03-10 21:43:32,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 141. [2021-03-10 21:43:32,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.9285714285714284) internal successors, (410), 140 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 410 transitions. [2021-03-10 21:43:32,208 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 410 transitions. Word has length 15 [2021-03-10 21:43:32,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:32,208 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 410 transitions. [2021-03-10 21:43:32,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:32,208 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 410 transitions. [2021-03-10 21:43:32,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:32,209 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:32,209 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:32,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-03-10 21:43:32,411 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:32,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1951803882, now seen corresponding path program 23 times [2021-03-10 21:43:32,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:32,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991577404] [2021-03-10 21:43:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:32,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991577404] [2021-03-10 21:43:32,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818855640] [2021-03-10 21:43:32,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:32,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:32,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:32,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:32,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:32,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:32,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:32,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745356614] [2021-03-10 21:43:32,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:32,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:32,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:32,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:32,611 INFO L87 Difference]: Start difference. First operand 141 states and 410 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:32,850 INFO L93 Difference]: Finished difference Result 223 states and 605 transitions. [2021-03-10 21:43:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:32,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:32,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:32,851 INFO L225 Difference]: With dead ends: 223 [2021-03-10 21:43:32,851 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:43:32,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:43:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 140. [2021-03-10 21:43:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.9280575539568345) internal successors, (407), 139 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 407 transitions. [2021-03-10 21:43:32,854 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 407 transitions. Word has length 15 [2021-03-10 21:43:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:32,854 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 407 transitions. [2021-03-10 21:43:32,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 407 transitions. [2021-03-10 21:43:32,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:32,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:32,855 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:33,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:33,071 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:33,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1273184878, now seen corresponding path program 7 times [2021-03-10 21:43:33,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:33,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969376622] [2021-03-10 21:43:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:33,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969376622] [2021-03-10 21:43:33,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523049674] [2021-03-10 21:43:33,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:33,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:33,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:33,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 21:43:33,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395747121] [2021-03-10 21:43:33,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:33,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:33,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:33,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:33,203 INFO L87 Difference]: Start difference. First operand 140 states and 407 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:33,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:33,523 INFO L93 Difference]: Finished difference Result 227 states and 607 transitions. [2021-03-10 21:43:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:43:33,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:33,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:33,524 INFO L225 Difference]: With dead ends: 227 [2021-03-10 21:43:33,524 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 21:43:33,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 230.0ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 21:43:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 135. [2021-03-10 21:43:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8805970149253732) internal successors, (386), 134 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:33,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 386 transitions. [2021-03-10 21:43:33,527 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 386 transitions. Word has length 15 [2021-03-10 21:43:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:33,527 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 386 transitions. [2021-03-10 21:43:33,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 386 transitions. [2021-03-10 21:43:33,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:33,528 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:33,528 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:33,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-10 21:43:33,728 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:33,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1807933612, now seen corresponding path program 24 times [2021-03-10 21:43:33,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:33,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757017176] [2021-03-10 21:43:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:33,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757017176] [2021-03-10 21:43:33,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853612208] [2021-03-10 21:43:33,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:33,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:43:33,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:33,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:33,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:33,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:33,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:33,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140708138] [2021-03-10 21:43:33,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:33,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:33,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:33,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:33,888 INFO L87 Difference]: Start difference. First operand 135 states and 386 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:34,062 INFO L93 Difference]: Finished difference Result 190 states and 521 transitions. [2021-03-10 21:43:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:34,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:34,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:34,064 INFO L225 Difference]: With dead ends: 190 [2021-03-10 21:43:34,064 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 21:43:34,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:34,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 21:43:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-03-10 21:43:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.8666666666666667) internal successors, (387), 135 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 387 transitions. [2021-03-10 21:43:34,067 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 387 transitions. Word has length 15 [2021-03-10 21:43:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:34,067 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 387 transitions. [2021-03-10 21:43:34,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 387 transitions. [2021-03-10 21:43:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:34,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:34,068 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:34,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:34,275 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:34,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1042546422, now seen corresponding path program 8 times [2021-03-10 21:43:34,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:34,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092675031] [2021-03-10 21:43:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:34,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092675031] [2021-03-10 21:43:34,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627577419] [2021-03-10 21:43:34,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:34,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:34,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:34,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:34,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:34,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 21:43:34,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174983524] [2021-03-10 21:43:34,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:34,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:34,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:34,398 INFO L87 Difference]: Start difference. First operand 136 states and 387 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:34,833 INFO L93 Difference]: Finished difference Result 269 states and 705 transitions. [2021-03-10 21:43:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:43:34,834 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:34,835 INFO L225 Difference]: With dead ends: 269 [2021-03-10 21:43:34,835 INFO L226 Difference]: Without dead ends: 254 [2021-03-10 21:43:34,835 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:43:34,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-03-10 21:43:34,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 111. [2021-03-10 21:43:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.8727272727272726) internal successors, (316), 110 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 316 transitions. [2021-03-10 21:43:34,838 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 316 transitions. Word has length 15 [2021-03-10 21:43:34,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:34,838 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 316 transitions. [2021-03-10 21:43:34,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:34,838 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 316 transitions. [2021-03-10 21:43:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:34,838 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:34,838 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:35,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-10 21:43:35,043 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:35,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1544487814, now seen corresponding path program 25 times [2021-03-10 21:43:35,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:35,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066307243] [2021-03-10 21:43:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:35,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066307243] [2021-03-10 21:43:35,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130497330] [2021-03-10 21:43:35,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:35,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:35,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:35,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:35,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:35,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733487117] [2021-03-10 21:43:35,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:35,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:35,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:35,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:35,225 INFO L87 Difference]: Start difference. First operand 111 states and 316 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:35,402 INFO L93 Difference]: Finished difference Result 195 states and 547 transitions. [2021-03-10 21:43:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:35,404 INFO L225 Difference]: With dead ends: 195 [2021-03-10 21:43:35,404 INFO L226 Difference]: Without dead ends: 190 [2021-03-10 21:43:35,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-03-10 21:43:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 115. [2021-03-10 21:43:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.8771929824561404) internal successors, (328), 114 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 328 transitions. [2021-03-10 21:43:35,407 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 328 transitions. Word has length 15 [2021-03-10 21:43:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:35,407 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 328 transitions. [2021-03-10 21:43:35,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 328 transitions. [2021-03-10 21:43:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:35,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:35,408 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:35,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:35,628 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:35,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:35,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1323878784, now seen corresponding path program 26 times [2021-03-10 21:43:35,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:35,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556485946] [2021-03-10 21:43:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:35,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556485946] [2021-03-10 21:43:35,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052541561] [2021-03-10 21:43:35,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:43:35,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:35,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:35,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:35,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:35,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:35,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:35,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224739343] [2021-03-10 21:43:35,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:35,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:35,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:35,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:35,809 INFO L87 Difference]: Start difference. First operand 115 states and 328 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:36,084 INFO L93 Difference]: Finished difference Result 234 states and 644 transitions. [2021-03-10 21:43:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:36,085 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:36,086 INFO L225 Difference]: With dead ends: 234 [2021-03-10 21:43:36,086 INFO L226 Difference]: Without dead ends: 229 [2021-03-10 21:43:36,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-03-10 21:43:36,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 117. [2021-03-10 21:43:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.896551724137931) internal successors, (336), 116 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 336 transitions. [2021-03-10 21:43:36,092 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 336 transitions. Word has length 15 [2021-03-10 21:43:36,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:36,092 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 336 transitions. [2021-03-10 21:43:36,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:36,092 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 336 transitions. [2021-03-10 21:43:36,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:36,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:36,093 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:36,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:36,293 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:36,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:36,294 INFO L82 PathProgramCache]: Analyzing trace with hash 37677322, now seen corresponding path program 27 times [2021-03-10 21:43:36,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:36,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063716019] [2021-03-10 21:43:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:36,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063716019] [2021-03-10 21:43:36,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854748282] [2021-03-10 21:43:36,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:36,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:36,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:36,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:36,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:36,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:36,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:36,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590525644] [2021-03-10 21:43:36,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:36,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:36,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:36,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:36,481 INFO L87 Difference]: Start difference. First operand 117 states and 336 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:36,781 INFO L93 Difference]: Finished difference Result 207 states and 572 transitions. [2021-03-10 21:43:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:36,781 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:36,782 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:43:36,782 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 21:43:36,782 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:43:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 21:43:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 113. [2021-03-10 21:43:36,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.875) internal successors, (322), 112 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 322 transitions. [2021-03-10 21:43:36,785 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 322 transitions. Word has length 15 [2021-03-10 21:43:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:36,785 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 322 transitions. [2021-03-10 21:43:36,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 322 transitions. [2021-03-10 21:43:36,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:36,786 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:36,786 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:36,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-03-10 21:43:36,995 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1830225050, now seen corresponding path program 28 times [2021-03-10 21:43:36,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:36,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582280023] [2021-03-10 21:43:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:37,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582280023] [2021-03-10 21:43:37,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986136846] [2021-03-10 21:43:37,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:37,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:37,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:37,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:37,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:37,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:37,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:37,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552149629] [2021-03-10 21:43:37,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:37,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:37,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:37,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:37,169 INFO L87 Difference]: Start difference. First operand 113 states and 322 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:37,404 INFO L93 Difference]: Finished difference Result 185 states and 511 transitions. [2021-03-10 21:43:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:37,404 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:37,405 INFO L225 Difference]: With dead ends: 185 [2021-03-10 21:43:37,405 INFO L226 Difference]: Without dead ends: 180 [2021-03-10 21:43:37,405 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-03-10 21:43:37,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 117. [2021-03-10 21:43:37,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.913793103448276) internal successors, (338), 116 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 338 transitions. [2021-03-10 21:43:37,408 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 338 transitions. Word has length 15 [2021-03-10 21:43:37,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:37,408 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 338 transitions. [2021-03-10 21:43:37,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 338 transitions. [2021-03-10 21:43:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:37,409 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:37,409 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:37,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:37,610 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:37,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:37,610 INFO L82 PathProgramCache]: Analyzing trace with hash -468668944, now seen corresponding path program 29 times [2021-03-10 21:43:37,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:37,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786449472] [2021-03-10 21:43:37,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:37,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786449472] [2021-03-10 21:43:37,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676658257] [2021-03-10 21:43:37,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:37,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:37,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:37,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:37,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:37,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:37,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:37,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692055240] [2021-03-10 21:43:37,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:37,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:37,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:37,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:37,790 INFO L87 Difference]: Start difference. First operand 117 states and 338 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:38,041 INFO L93 Difference]: Finished difference Result 195 states and 528 transitions. [2021-03-10 21:43:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:38,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:38,043 INFO L225 Difference]: With dead ends: 195 [2021-03-10 21:43:38,043 INFO L226 Difference]: Without dead ends: 189 [2021-03-10 21:43:38,043 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:38,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-03-10 21:43:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 115. [2021-03-10 21:43:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.8947368421052633) internal successors, (330), 114 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 330 transitions. [2021-03-10 21:43:38,045 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 330 transitions. Word has length 15 [2021-03-10 21:43:38,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:38,045 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 330 transitions. [2021-03-10 21:43:38,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 330 transitions. [2021-03-10 21:43:38,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:43:38,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:38,046 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:38,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 21:43:38,255 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:38,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1003898746, now seen corresponding path program 30 times [2021-03-10 21:43:38,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:38,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843388382] [2021-03-10 21:43:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:38,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843388382] [2021-03-10 21:43:38,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691211145] [2021-03-10 21:43:38,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:43:38,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:43:38,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:43:38,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:38,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:38,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:38,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099682298] [2021-03-10 21:43:38,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:38,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:38,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:38,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:38,426 INFO L87 Difference]: Start difference. First operand 115 states and 330 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:38,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:38,675 INFO L93 Difference]: Finished difference Result 166 states and 460 transitions. [2021-03-10 21:43:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:38,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:43:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:38,676 INFO L225 Difference]: With dead ends: 166 [2021-03-10 21:43:38,676 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 21:43:38,676 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:38,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 21:43:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 113. [2021-03-10 21:43:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.875) internal successors, (322), 112 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:38,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 322 transitions. [2021-03-10 21:43:38,679 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 322 transitions. Word has length 15 [2021-03-10 21:43:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:38,679 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 322 transitions. [2021-03-10 21:43:38,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:38,679 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 322 transitions. [2021-03-10 21:43:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:38,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:38,679 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:38,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-03-10 21:43:38,880 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:38,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:38,880 INFO L82 PathProgramCache]: Analyzing trace with hash -639898996, now seen corresponding path program 1 times [2021-03-10 21:43:38,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:38,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599717600] [2021-03-10 21:43:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:38,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599717600] [2021-03-10 21:43:38,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925930783] [2021-03-10 21:43:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:38,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:38,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:38,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:38,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:43:38,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763362067] [2021-03-10 21:43:38,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:43:38,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:38,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:43:38,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:43:38,996 INFO L87 Difference]: Start difference. First operand 113 states and 322 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:39,084 INFO L93 Difference]: Finished difference Result 186 states and 521 transitions. [2021-03-10 21:43:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:39,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:39,085 INFO L225 Difference]: With dead ends: 186 [2021-03-10 21:43:39,085 INFO L226 Difference]: Without dead ends: 186 [2021-03-10 21:43:39,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-10 21:43:39,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 126. [2021-03-10 21:43:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.992) internal successors, (374), 125 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 374 transitions. [2021-03-10 21:43:39,088 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 374 transitions. Word has length 16 [2021-03-10 21:43:39,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:39,088 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 374 transitions. [2021-03-10 21:43:39,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 374 transitions. [2021-03-10 21:43:39,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:39,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:39,089 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:39,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:39,305 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:39,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:39,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1991072770, now seen corresponding path program 1 times [2021-03-10 21:43:39,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:39,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170296423] [2021-03-10 21:43:39,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:39,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170296423] [2021-03-10 21:43:39,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921571860] [2021-03-10 21:43:39,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:43:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:39,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:39,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:39,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:39,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:43:39,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704258997] [2021-03-10 21:43:39,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:39,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:39,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:39,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:39,437 INFO L87 Difference]: Start difference. First operand 126 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:39,541 INFO L93 Difference]: Finished difference Result 163 states and 462 transitions. [2021-03-10 21:43:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:39,542 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:39,542 INFO L225 Difference]: With dead ends: 163 [2021-03-10 21:43:39,542 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 21:43:39,543 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:39,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 21:43:39,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 126. [2021-03-10 21:43:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.952) internal successors, (369), 125 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 369 transitions. [2021-03-10 21:43:39,546 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 369 transitions. Word has length 16 [2021-03-10 21:43:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:39,546 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 369 transitions. [2021-03-10 21:43:39,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 369 transitions. [2021-03-10 21:43:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:39,546 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:39,547 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:39,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-03-10 21:43:39,755 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:39,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1652532542, now seen corresponding path program 2 times [2021-03-10 21:43:39,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:39,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346991657] [2021-03-10 21:43:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:39,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346991657] [2021-03-10 21:43:39,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704722643] [2021-03-10 21:43:39,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:39,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:39,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:39,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:39,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:39,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:39,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:43:39,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125380397] [2021-03-10 21:43:39,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:39,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:39,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:39,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:39,874 INFO L87 Difference]: Start difference. First operand 126 states and 369 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:39,986 INFO L93 Difference]: Finished difference Result 193 states and 538 transitions. [2021-03-10 21:43:39,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:39,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:39,988 INFO L225 Difference]: With dead ends: 193 [2021-03-10 21:43:39,988 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 21:43:39,988 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:39,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 21:43:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 129. [2021-03-10 21:43:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 3.0) internal successors, (384), 128 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 384 transitions. [2021-03-10 21:43:39,990 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 384 transitions. Word has length 16 [2021-03-10 21:43:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:39,990 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 384 transitions. [2021-03-10 21:43:39,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:39,990 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 384 transitions. [2021-03-10 21:43:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:39,991 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:39,991 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:40,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:40,212 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:40,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:40,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1447398580, now seen corresponding path program 2 times [2021-03-10 21:43:40,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:40,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175749530] [2021-03-10 21:43:40,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:40,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175749530] [2021-03-10 21:43:40,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574350808] [2021-03-10 21:43:40,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:40,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:40,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:40,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:40,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:40,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:40,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:40,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46543510] [2021-03-10 21:43:40,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:40,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:40,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:40,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:40,327 INFO L87 Difference]: Start difference. First operand 129 states and 384 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:40,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:40,457 INFO L93 Difference]: Finished difference Result 180 states and 505 transitions. [2021-03-10 21:43:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:40,458 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:40,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:40,459 INFO L225 Difference]: With dead ends: 180 [2021-03-10 21:43:40,459 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 21:43:40,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:40,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 21:43:40,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2021-03-10 21:43:40,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.9925925925925925) internal successors, (404), 135 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 404 transitions. [2021-03-10 21:43:40,462 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 404 transitions. Word has length 16 [2021-03-10 21:43:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:40,462 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 404 transitions. [2021-03-10 21:43:40,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 404 transitions. [2021-03-10 21:43:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:40,463 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:40,463 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:40,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:40,686 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:40,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:40,686 INFO L82 PathProgramCache]: Analyzing trace with hash -18443474, now seen corresponding path program 3 times [2021-03-10 21:43:40,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:40,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560675425] [2021-03-10 21:43:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:40,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560675425] [2021-03-10 21:43:40,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592685415] [2021-03-10 21:43:40,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:40,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:40,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:40,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:40,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:40,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:43:40,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558597123] [2021-03-10 21:43:40,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:40,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:40,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:40,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:40,820 INFO L87 Difference]: Start difference. First operand 136 states and 404 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:40,941 INFO L93 Difference]: Finished difference Result 176 states and 499 transitions. [2021-03-10 21:43:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:40,942 INFO L225 Difference]: With dead ends: 176 [2021-03-10 21:43:40,942 INFO L226 Difference]: Without dead ends: 173 [2021-03-10 21:43:40,942 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-03-10 21:43:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 136. [2021-03-10 21:43:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.9703703703703703) internal successors, (401), 135 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 401 transitions. [2021-03-10 21:43:40,945 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 401 transitions. Word has length 16 [2021-03-10 21:43:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:40,945 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 401 transitions. [2021-03-10 21:43:40,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 401 transitions. [2021-03-10 21:43:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:40,946 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:40,946 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:41,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:41,161 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash 907579970, now seen corresponding path program 3 times [2021-03-10 21:43:41,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:41,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607912936] [2021-03-10 21:43:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:41,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607912936] [2021-03-10 21:43:41,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951917343] [2021-03-10 21:43:41,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:41,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:41,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:41,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:41,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:41,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:41,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:41,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658653017] [2021-03-10 21:43:41,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:41,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:41,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:41,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:41,301 INFO L87 Difference]: Start difference. First operand 136 states and 401 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:41,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:41,413 INFO L93 Difference]: Finished difference Result 162 states and 468 transitions. [2021-03-10 21:43:41,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:41,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:41,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:41,414 INFO L225 Difference]: With dead ends: 162 [2021-03-10 21:43:41,414 INFO L226 Difference]: Without dead ends: 162 [2021-03-10 21:43:41,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-03-10 21:43:41,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-03-10 21:43:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.9770992366412212) internal successors, (390), 131 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 390 transitions. [2021-03-10 21:43:41,417 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 390 transitions. Word has length 16 [2021-03-10 21:43:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:41,417 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 390 transitions. [2021-03-10 21:43:41,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:41,418 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 390 transitions. [2021-03-10 21:43:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:41,418 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:41,418 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:41,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:41,623 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:41,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:41,623 INFO L82 PathProgramCache]: Analyzing trace with hash -408327260, now seen corresponding path program 4 times [2021-03-10 21:43:41,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:41,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298351444] [2021-03-10 21:43:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:41,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298351444] [2021-03-10 21:43:41,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790566054] [2021-03-10 21:43:41,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:41,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:41,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:41,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:41,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:41,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:41,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:41,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402174427] [2021-03-10 21:43:41,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:41,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:41,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:41,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:41,755 INFO L87 Difference]: Start difference. First operand 132 states and 390 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:41,862 INFO L93 Difference]: Finished difference Result 192 states and 545 transitions. [2021-03-10 21:43:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:41,864 INFO L225 Difference]: With dead ends: 192 [2021-03-10 21:43:41,864 INFO L226 Difference]: Without dead ends: 192 [2021-03-10 21:43:41,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-03-10 21:43:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 138. [2021-03-10 21:43:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0437956204379564) internal successors, (417), 137 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:41,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 417 transitions. [2021-03-10 21:43:41,866 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 417 transitions. Word has length 16 [2021-03-10 21:43:41,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:41,866 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 417 transitions. [2021-03-10 21:43:41,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 417 transitions. [2021-03-10 21:43:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:41,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:41,871 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:42,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-03-10 21:43:42,087 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:42,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:42,087 INFO L82 PathProgramCache]: Analyzing trace with hash 786708914, now seen corresponding path program 4 times [2021-03-10 21:43:42,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:42,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923896167] [2021-03-10 21:43:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:42,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923896167] [2021-03-10 21:43:42,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885688735] [2021-03-10 21:43:42,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:42,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:42,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:42,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:42,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:43:42,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040122899] [2021-03-10 21:43:42,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:42,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:42,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:42,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:42,209 INFO L87 Difference]: Start difference. First operand 138 states and 417 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:42,333 INFO L93 Difference]: Finished difference Result 198 states and 562 transitions. [2021-03-10 21:43:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:42,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:42,335 INFO L225 Difference]: With dead ends: 198 [2021-03-10 21:43:42,335 INFO L226 Difference]: Without dead ends: 194 [2021-03-10 21:43:42,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-03-10 21:43:42,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2021-03-10 21:43:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.054421768707483) internal successors, (449), 147 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 449 transitions. [2021-03-10 21:43:42,338 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 449 transitions. Word has length 16 [2021-03-10 21:43:42,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:42,339 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 449 transitions. [2021-03-10 21:43:42,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 449 transitions. [2021-03-10 21:43:42,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:42,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:42,339 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:42,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-03-10 21:43:42,540 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:42,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:42,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2079303276, now seen corresponding path program 5 times [2021-03-10 21:43:42,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:42,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566731430] [2021-03-10 21:43:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:42,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566731430] [2021-03-10 21:43:42,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872294019] [2021-03-10 21:43:42,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:43:42,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:42,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:42,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:42,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:42,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:42,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:42,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107437446] [2021-03-10 21:43:42,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:42,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:42,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:42,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:42,687 INFO L87 Difference]: Start difference. First operand 148 states and 449 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:42,781 INFO L93 Difference]: Finished difference Result 201 states and 572 transitions. [2021-03-10 21:43:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:42,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:42,782 INFO L225 Difference]: With dead ends: 201 [2021-03-10 21:43:42,782 INFO L226 Difference]: Without dead ends: 198 [2021-03-10 21:43:42,782 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-03-10 21:43:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2021-03-10 21:43:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.0340136054421767) internal successors, (446), 147 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 446 transitions. [2021-03-10 21:43:42,785 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 446 transitions. Word has length 16 [2021-03-10 21:43:42,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:42,785 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 446 transitions. [2021-03-10 21:43:42,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 446 transitions. [2021-03-10 21:43:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:42,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:42,785 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:42,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-03-10 21:43:42,991 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:42,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:42,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1153279832, now seen corresponding path program 5 times [2021-03-10 21:43:42,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:42,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727416415] [2021-03-10 21:43:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:43,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727416415] [2021-03-10 21:43:43,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328354020] [2021-03-10 21:43:43,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:43,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:43,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:43,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:43,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:43,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:43,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:43:43,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097232760] [2021-03-10 21:43:43,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:43,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:43,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:43,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:43,096 INFO L87 Difference]: Start difference. First operand 148 states and 446 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:43,199 INFO L93 Difference]: Finished difference Result 200 states and 570 transitions. [2021-03-10 21:43:43,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:43,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:43,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:43,200 INFO L225 Difference]: With dead ends: 200 [2021-03-10 21:43:43,200 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 21:43:43,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:43,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 21:43:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 145. [2021-03-10 21:43:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0347222222222223) internal successors, (437), 144 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 437 transitions. [2021-03-10 21:43:43,202 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 437 transitions. Word has length 16 [2021-03-10 21:43:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:43,202 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 437 transitions. [2021-03-10 21:43:43,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:43,202 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 437 transitions. [2021-03-10 21:43:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:43,203 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:43,203 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:43,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-03-10 21:43:43,403 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:43,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1341923340, now seen corresponding path program 6 times [2021-03-10 21:43:43,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:43,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055242090] [2021-03-10 21:43:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:43,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055242090] [2021-03-10 21:43:43,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684730146] [2021-03-10 21:43:43,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:43,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:43:43,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:43,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:43,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:43,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:43,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:43:43,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171823787] [2021-03-10 21:43:43,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:43,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:43,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:43,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:43,514 INFO L87 Difference]: Start difference. First operand 145 states and 437 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:43,622 INFO L93 Difference]: Finished difference Result 178 states and 518 transitions. [2021-03-10 21:43:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:43,622 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:43,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:43,623 INFO L225 Difference]: With dead ends: 178 [2021-03-10 21:43:43,623 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 21:43:43,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 21:43:43,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 145. [2021-03-10 21:43:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.013888888888889) internal successors, (434), 144 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 434 transitions. [2021-03-10 21:43:43,626 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 434 transitions. Word has length 16 [2021-03-10 21:43:43,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:43,626 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 434 transitions. [2021-03-10 21:43:43,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 434 transitions. [2021-03-10 21:43:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:43,627 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:43,627 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:43,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:43,843 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:43,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1171713858, now seen corresponding path program 6 times [2021-03-10 21:43:43,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:43,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891724112] [2021-03-10 21:43:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:43,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891724112] [2021-03-10 21:43:43,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053877821] [2021-03-10 21:43:43,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:43,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:43:43,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:43,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:43,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:43,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:43,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:43:43,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318559480] [2021-03-10 21:43:43,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:43:43,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:43,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:43:43,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:43:43,946 INFO L87 Difference]: Start difference. First operand 145 states and 434 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:44,043 INFO L93 Difference]: Finished difference Result 200 states and 574 transitions. [2021-03-10 21:43:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:44,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:44,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:44,044 INFO L225 Difference]: With dead ends: 200 [2021-03-10 21:43:44,044 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 21:43:44,044 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:44,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 21:43:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2021-03-10 21:43:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0) internal successors, (411), 137 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 411 transitions. [2021-03-10 21:43:44,050 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 411 transitions. Word has length 16 [2021-03-10 21:43:44,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:44,050 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 411 transitions. [2021-03-10 21:43:44,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:44,050 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 411 transitions. [2021-03-10 21:43:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:44,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:44,051 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:44,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-03-10 21:43:44,266 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:44,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:44,266 INFO L82 PathProgramCache]: Analyzing trace with hash 228804358, now seen corresponding path program 7 times [2021-03-10 21:43:44,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:44,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781246536] [2021-03-10 21:43:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:44,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781246536] [2021-03-10 21:43:44,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665252312] [2021-03-10 21:43:44,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:44,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:44,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:44,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:44,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-03-10 21:43:44,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71847610] [2021-03-10 21:43:44,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:43:44,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:44,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:43:44,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:44,427 INFO L87 Difference]: Start difference. First operand 138 states and 411 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:44,592 INFO L93 Difference]: Finished difference Result 314 states and 911 transitions. [2021-03-10 21:43:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:44,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:44,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:44,594 INFO L225 Difference]: With dead ends: 314 [2021-03-10 21:43:44,594 INFO L226 Difference]: Without dead ends: 314 [2021-03-10 21:43:44,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-03-10 21:43:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 152. [2021-03-10 21:43:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.0927152317880795) internal successors, (467), 151 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 467 transitions. [2021-03-10 21:43:44,598 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 467 transitions. Word has length 16 [2021-03-10 21:43:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:44,598 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 467 transitions. [2021-03-10 21:43:44,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 467 transitions. [2021-03-10 21:43:44,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:44,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:44,598 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:44,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:44,821 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1435191172, now seen corresponding path program 7 times [2021-03-10 21:43:44,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:44,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754579376] [2021-03-10 21:43:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:44,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754579376] [2021-03-10 21:43:44,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206528954] [2021-03-10 21:43:44,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:44,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:44,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:44,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:44,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:44,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436589757] [2021-03-10 21:43:44,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:44,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:44,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:44,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:44,951 INFO L87 Difference]: Start difference. First operand 152 states and 467 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:45,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:45,035 INFO L93 Difference]: Finished difference Result 257 states and 727 transitions. [2021-03-10 21:43:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:45,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:45,036 INFO L225 Difference]: With dead ends: 257 [2021-03-10 21:43:45,036 INFO L226 Difference]: Without dead ends: 247 [2021-03-10 21:43:45,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-03-10 21:43:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 152. [2021-03-10 21:43:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.0596026490066226) internal successors, (462), 151 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 462 transitions. [2021-03-10 21:43:45,039 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 462 transitions. Word has length 16 [2021-03-10 21:43:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:45,039 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 462 transitions. [2021-03-10 21:43:45,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 462 transitions. [2021-03-10 21:43:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:45,040 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:45,040 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:45,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-03-10 21:43:45,255 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:45,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:45,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1773731400, now seen corresponding path program 8 times [2021-03-10 21:43:45,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:45,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995745361] [2021-03-10 21:43:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:45,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995745361] [2021-03-10 21:43:45,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629816910] [2021-03-10 21:43:45,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:45,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:45,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:45,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:45,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:45,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:45,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-03-10 21:43:45,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108019995] [2021-03-10 21:43:45,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:43:45,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:45,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:43:45,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:45,413 INFO L87 Difference]: Start difference. First operand 152 states and 462 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:45,570 INFO L93 Difference]: Finished difference Result 311 states and 888 transitions. [2021-03-10 21:43:45,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:45,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:45,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:45,571 INFO L225 Difference]: With dead ends: 311 [2021-03-10 21:43:45,571 INFO L226 Difference]: Without dead ends: 311 [2021-03-10 21:43:45,571 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:45,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-03-10 21:43:45,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 158. [2021-03-10 21:43:45,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.1337579617834397) internal successors, (492), 157 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:45,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 492 transitions. [2021-03-10 21:43:45,574 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 492 transitions. Word has length 16 [2021-03-10 21:43:45,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:45,574 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 492 transitions. [2021-03-10 21:43:45,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:45,574 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 492 transitions. [2021-03-10 21:43:45,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:45,575 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:45,575 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:45,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:45,775 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:45,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:45,776 INFO L82 PathProgramCache]: Analyzing trace with hash -578695226, now seen corresponding path program 8 times [2021-03-10 21:43:45,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:45,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084614892] [2021-03-10 21:43:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:45,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084614892] [2021-03-10 21:43:45,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696672127] [2021-03-10 21:43:45,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:45,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:45,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:45,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:45,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:45,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:45,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:45,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815059871] [2021-03-10 21:43:45,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:45,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:45,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:45,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:45,903 INFO L87 Difference]: Start difference. First operand 158 states and 492 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:45,998 INFO L93 Difference]: Finished difference Result 283 states and 806 transitions. [2021-03-10 21:43:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:45,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:45,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:45,999 INFO L225 Difference]: With dead ends: 283 [2021-03-10 21:43:45,999 INFO L226 Difference]: Without dead ends: 279 [2021-03-10 21:43:45,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:45,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-03-10 21:43:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 165. [2021-03-10 21:43:46,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 3.1219512195121952) internal successors, (512), 164 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 512 transitions. [2021-03-10 21:43:46,002 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 512 transitions. Word has length 16 [2021-03-10 21:43:46,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:46,002 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 512 transitions. [2021-03-10 21:43:46,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 512 transitions. [2021-03-10 21:43:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:46,002 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:46,003 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:46,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-03-10 21:43:46,203 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:46,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:46,203 INFO L82 PathProgramCache]: Analyzing trace with hash 850259880, now seen corresponding path program 9 times [2021-03-10 21:43:46,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:46,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465805262] [2021-03-10 21:43:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:46,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465805262] [2021-03-10 21:43:46,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239050703] [2021-03-10 21:43:46,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:46,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:46,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:46,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:46,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:46,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:46,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-03-10 21:43:46,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938836619] [2021-03-10 21:43:46,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:43:46,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:46,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:43:46,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:46,355 INFO L87 Difference]: Start difference. First operand 165 states and 512 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:46,501 INFO L93 Difference]: Finished difference Result 294 states and 846 transitions. [2021-03-10 21:43:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:46,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:46,502 INFO L225 Difference]: With dead ends: 294 [2021-03-10 21:43:46,502 INFO L226 Difference]: Without dead ends: 291 [2021-03-10 21:43:46,502 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-03-10 21:43:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 168. [2021-03-10 21:43:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.0838323353293413) internal successors, (515), 167 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:46,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 515 transitions. [2021-03-10 21:43:46,506 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 515 transitions. Word has length 16 [2021-03-10 21:43:46,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:46,506 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 515 transitions. [2021-03-10 21:43:46,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:46,506 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 515 transitions. [2021-03-10 21:43:46,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:46,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:46,507 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:46,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:46,720 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:46,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1776283324, now seen corresponding path program 9 times [2021-03-10 21:43:46,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:46,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105177638] [2021-03-10 21:43:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:46,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105177638] [2021-03-10 21:43:46,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283190793] [2021-03-10 21:43:46,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:46,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:46,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:46,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:46,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:46,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:46,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:46,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652235044] [2021-03-10 21:43:46,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:46,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:46,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:46,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:46,850 INFO L87 Difference]: Start difference. First operand 168 states and 515 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:46,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:46,956 INFO L93 Difference]: Finished difference Result 271 states and 781 transitions. [2021-03-10 21:43:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:46,956 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:46,957 INFO L225 Difference]: With dead ends: 271 [2021-03-10 21:43:46,957 INFO L226 Difference]: Without dead ends: 271 [2021-03-10 21:43:46,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:43:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-03-10 21:43:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 153. [2021-03-10 21:43:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.0789473684210527) internal successors, (468), 152 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 468 transitions. [2021-03-10 21:43:46,961 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 468 transitions. Word has length 16 [2021-03-10 21:43:46,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:46,961 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 468 transitions. [2021-03-10 21:43:46,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:46,961 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 468 transitions. [2021-03-10 21:43:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:46,961 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:46,961 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:47,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-03-10 21:43:47,171 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:47,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:47,171 INFO L82 PathProgramCache]: Analyzing trace with hash -2036008658, now seen corresponding path program 10 times [2021-03-10 21:43:47,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:47,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87140339] [2021-03-10 21:43:47,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:47,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87140339] [2021-03-10 21:43:47,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961685977] [2021-03-10 21:43:47,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:47,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:47,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:47,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:47,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:47,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:47,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:43:47,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696227140] [2021-03-10 21:43:47,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:43:47,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:47,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:43:47,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:43:47,271 INFO L87 Difference]: Start difference. First operand 153 states and 468 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:47,370 INFO L93 Difference]: Finished difference Result 277 states and 782 transitions. [2021-03-10 21:43:47,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:47,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:47,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:47,371 INFO L225 Difference]: With dead ends: 277 [2021-03-10 21:43:47,371 INFO L226 Difference]: Without dead ends: 277 [2021-03-10 21:43:47,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-03-10 21:43:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 144. [2021-03-10 21:43:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 3.013986013986014) internal successors, (431), 143 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 431 transitions. [2021-03-10 21:43:47,374 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 431 transitions. Word has length 16 [2021-03-10 21:43:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:47,374 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 431 transitions. [2021-03-10 21:43:47,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 431 transitions. [2021-03-10 21:43:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:47,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:47,374 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:47,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:47,590 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:47,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:47,590 INFO L82 PathProgramCache]: Analyzing trace with hash 765941156, now seen corresponding path program 11 times [2021-03-10 21:43:47,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:47,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707916670] [2021-03-10 21:43:47,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:47,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707916670] [2021-03-10 21:43:47,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648222513] [2021-03-10 21:43:47,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:47,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:47,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:47,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:47,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:47,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:47,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:43:47,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267478037] [2021-03-10 21:43:47,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:47,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:47,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:47,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:47,695 INFO L87 Difference]: Start difference. First operand 144 states and 431 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:47,793 INFO L93 Difference]: Finished difference Result 252 states and 703 transitions. [2021-03-10 21:43:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:47,793 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:47,794 INFO L225 Difference]: With dead ends: 252 [2021-03-10 21:43:47,794 INFO L226 Difference]: Without dead ends: 252 [2021-03-10 21:43:47,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:47,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-03-10 21:43:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 146. [2021-03-10 21:43:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 3.027586206896552) internal successors, (439), 145 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 439 transitions. [2021-03-10 21:43:47,797 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 439 transitions. Word has length 16 [2021-03-10 21:43:47,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:47,797 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 439 transitions. [2021-03-10 21:43:47,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 439 transitions. [2021-03-10 21:43:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:47,797 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:47,797 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:47,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-03-10 21:43:47,998 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1376098404, now seen corresponding path program 12 times [2021-03-10 21:43:47,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:47,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852256757] [2021-03-10 21:43:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:43:48,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852256757] [2021-03-10 21:43:48,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228150283] [2021-03-10 21:43:48,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:48,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:43:48,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:48,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:48,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:48,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:48,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:48,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588940819] [2021-03-10 21:43:48,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:48,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:48,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:48,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:48,134 INFO L87 Difference]: Start difference. First operand 146 states and 439 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:48,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:48,360 INFO L93 Difference]: Finished difference Result 228 states and 645 transitions. [2021-03-10 21:43:48,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:48,360 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:48,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:48,361 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:43:48,361 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 21:43:48,361 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:43:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 21:43:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 143. [2021-03-10 21:43:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.035211267605634) internal successors, (431), 142 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 431 transitions. [2021-03-10 21:43:48,364 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 431 transitions. Word has length 16 [2021-03-10 21:43:48,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:48,365 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 431 transitions. [2021-03-10 21:43:48,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 431 transitions. [2021-03-10 21:43:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:48,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:48,365 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:48,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-03-10 21:43:48,587 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:48,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:48,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1350168710, now seen corresponding path program 10 times [2021-03-10 21:43:48,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:48,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782477175] [2021-03-10 21:43:48,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:48,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782477175] [2021-03-10 21:43:48,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:48,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:43:48,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268190887] [2021-03-10 21:43:48,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:48,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:48,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:48,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:48,621 INFO L87 Difference]: Start difference. First operand 143 states and 431 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:48,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:48,730 INFO L93 Difference]: Finished difference Result 204 states and 571 transitions. [2021-03-10 21:43:48,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:48,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:48,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:48,731 INFO L225 Difference]: With dead ends: 204 [2021-03-10 21:43:48,732 INFO L226 Difference]: Without dead ends: 194 [2021-03-10 21:43:48,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-03-10 21:43:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 145. [2021-03-10 21:43:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0069444444444446) internal successors, (433), 144 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:48,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 433 transitions. [2021-03-10 21:43:48,734 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 433 transitions. Word has length 16 [2021-03-10 21:43:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:48,734 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 433 transitions. [2021-03-10 21:43:48,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 433 transitions. [2021-03-10 21:43:48,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:48,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:48,734 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:48,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2021-03-10 21:43:48,735 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:48,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash -474092858, now seen corresponding path program 11 times [2021-03-10 21:43:48,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:48,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470586083] [2021-03-10 21:43:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:48,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470586083] [2021-03-10 21:43:48,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:48,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:43:48,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736462307] [2021-03-10 21:43:48,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:48,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:48,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:48,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:48,784 INFO L87 Difference]: Start difference. First operand 145 states and 433 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:48,929 INFO L93 Difference]: Finished difference Result 197 states and 551 transitions. [2021-03-10 21:43:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:48,939 INFO L225 Difference]: With dead ends: 197 [2021-03-10 21:43:48,939 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 21:43:48,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:48,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 21:43:48,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 151. [2021-03-10 21:43:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.966666666666667) internal successors, (445), 150 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 445 transitions. [2021-03-10 21:43:48,943 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 445 transitions. Word has length 16 [2021-03-10 21:43:48,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:48,943 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 445 transitions. [2021-03-10 21:43:48,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 445 transitions. [2021-03-10 21:43:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:48,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:48,943 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:48,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2021-03-10 21:43:48,944 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:48,944 INFO L82 PathProgramCache]: Analyzing trace with hash -547465338, now seen corresponding path program 12 times [2021-03-10 21:43:48,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:48,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600367672] [2021-03-10 21:43:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:48,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600367672] [2021-03-10 21:43:48,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:48,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:43:48,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984241774] [2021-03-10 21:43:48,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:48,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:48,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:48,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:48,981 INFO L87 Difference]: Start difference. First operand 151 states and 445 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:49,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:49,109 INFO L93 Difference]: Finished difference Result 182 states and 529 transitions. [2021-03-10 21:43:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:49,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:49,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:49,114 INFO L225 Difference]: With dead ends: 182 [2021-03-10 21:43:49,114 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 21:43:49,114 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:49,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 21:43:49,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 143. [2021-03-10 21:43:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.0211267605633805) internal successors, (429), 142 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 429 transitions. [2021-03-10 21:43:49,117 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 429 transitions. Word has length 16 [2021-03-10 21:43:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:49,117 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 429 transitions. [2021-03-10 21:43:49,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:49,117 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 429 transitions. [2021-03-10 21:43:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:49,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:49,118 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:49,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-03-10 21:43:49,118 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:49,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:49,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1766834084, now seen corresponding path program 13 times [2021-03-10 21:43:49,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:49,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871224054] [2021-03-10 21:43:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:49,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871224054] [2021-03-10 21:43:49,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563329688] [2021-03-10 21:43:49,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:49,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:49,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:49,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:49,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:49,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030844891] [2021-03-10 21:43:49,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:49,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:49,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:49,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:49,253 INFO L87 Difference]: Start difference. First operand 143 states and 429 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:49,352 INFO L93 Difference]: Finished difference Result 259 states and 737 transitions. [2021-03-10 21:43:49,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:49,352 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:49,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:49,353 INFO L225 Difference]: With dead ends: 259 [2021-03-10 21:43:49,353 INFO L226 Difference]: Without dead ends: 259 [2021-03-10 21:43:49,353 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:49,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-03-10 21:43:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 151. [2021-03-10 21:43:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 3.1266666666666665) internal successors, (469), 150 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 469 transitions. [2021-03-10 21:43:49,356 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 469 transitions. Word has length 16 [2021-03-10 21:43:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:49,356 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 469 transitions. [2021-03-10 21:43:49,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 469 transitions. [2021-03-10 21:43:49,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:49,356 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:49,356 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:49,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:49,557 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1333097038, now seen corresponding path program 13 times [2021-03-10 21:43:49,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:49,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629784291] [2021-03-10 21:43:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:49,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629784291] [2021-03-10 21:43:49,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043570061] [2021-03-10 21:43:49,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:49,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:49,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:49,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:49,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:49,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966455068] [2021-03-10 21:43:49,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:49,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:49,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:49,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:49,701 INFO L87 Difference]: Start difference. First operand 151 states and 469 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:49,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:49,794 INFO L93 Difference]: Finished difference Result 245 states and 702 transitions. [2021-03-10 21:43:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:49,794 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:49,795 INFO L225 Difference]: With dead ends: 245 [2021-03-10 21:43:49,795 INFO L226 Difference]: Without dead ends: 241 [2021-03-10 21:43:49,795 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-03-10 21:43:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 159. [2021-03-10 21:43:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.1265822784810124) internal successors, (494), 158 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 494 transitions. [2021-03-10 21:43:49,799 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 494 transitions. Word has length 16 [2021-03-10 21:43:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:49,799 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 494 transitions. [2021-03-10 21:43:49,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 494 transitions. [2021-03-10 21:43:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:49,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:49,799 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:50,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:50,007 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash 95858068, now seen corresponding path program 14 times [2021-03-10 21:43:50,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:50,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127365048] [2021-03-10 21:43:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:50,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127365048] [2021-03-10 21:43:50,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970826690] [2021-03-10 21:43:50,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:50,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:50,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:50,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:50,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:50,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:50,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:50,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621754448] [2021-03-10 21:43:50,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:50,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:50,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:50,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:50,120 INFO L87 Difference]: Start difference. First operand 159 states and 494 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:50,207 INFO L93 Difference]: Finished difference Result 256 states and 722 transitions. [2021-03-10 21:43:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:50,208 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:50,208 INFO L225 Difference]: With dead ends: 256 [2021-03-10 21:43:50,208 INFO L226 Difference]: Without dead ends: 253 [2021-03-10 21:43:50,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-03-10 21:43:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 162. [2021-03-10 21:43:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 3.0869565217391304) internal successors, (497), 161 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 497 transitions. [2021-03-10 21:43:50,212 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 497 transitions. Word has length 16 [2021-03-10 21:43:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:50,212 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 497 transitions. [2021-03-10 21:43:50,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 497 transitions. [2021-03-10 21:43:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:50,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:50,213 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:50,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-03-10 21:43:50,427 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:50,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:50,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1021881512, now seen corresponding path program 14 times [2021-03-10 21:43:50,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:50,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436311800] [2021-03-10 21:43:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:50,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436311800] [2021-03-10 21:43:50,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877285348] [2021-03-10 21:43:50,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:50,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:50,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:50,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:50,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:50,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:50,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761204126] [2021-03-10 21:43:50,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:50,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:50,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:50,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:50,572 INFO L87 Difference]: Start difference. First operand 162 states and 497 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:50,667 INFO L93 Difference]: Finished difference Result 260 states and 746 transitions. [2021-03-10 21:43:50,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:50,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:50,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:50,668 INFO L225 Difference]: With dead ends: 260 [2021-03-10 21:43:50,668 INFO L226 Difference]: Without dead ends: 260 [2021-03-10 21:43:50,668 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:50,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-03-10 21:43:50,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 159. [2021-03-10 21:43:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.088607594936709) internal successors, (488), 158 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 488 transitions. [2021-03-10 21:43:50,671 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 488 transitions. Word has length 16 [2021-03-10 21:43:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:50,671 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 488 transitions. [2021-03-10 21:43:50,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 488 transitions. [2021-03-10 21:43:50,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:50,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:50,671 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:50,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:50,872 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:50,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:50,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2109417596, now seen corresponding path program 15 times [2021-03-10 21:43:50,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:50,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479975757] [2021-03-10 21:43:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:50,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479975757] [2021-03-10 21:43:50,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313197552] [2021-03-10 21:43:50,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:50,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:43:50,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:50,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:50,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:50,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:50,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:50,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160202928] [2021-03-10 21:43:50,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:50,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:51,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:51,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:51,000 INFO L87 Difference]: Start difference. First operand 159 states and 488 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:51,097 INFO L93 Difference]: Finished difference Result 256 states and 720 transitions. [2021-03-10 21:43:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:51,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:51,098 INFO L225 Difference]: With dead ends: 256 [2021-03-10 21:43:51,098 INFO L226 Difference]: Without dead ends: 256 [2021-03-10 21:43:51,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-03-10 21:43:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 154. [2021-03-10 21:43:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 3.0718954248366015) internal successors, (470), 153 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:51,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 470 transitions. [2021-03-10 21:43:51,101 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 470 transitions. Word has length 16 [2021-03-10 21:43:51,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:51,101 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 470 transitions. [2021-03-10 21:43:51,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:51,101 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 470 transitions. [2021-03-10 21:43:51,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:51,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:51,101 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:51,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-03-10 21:43:51,302 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:51,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:51,302 INFO L82 PathProgramCache]: Analyzing trace with hash -213836346, now seen corresponding path program 16 times [2021-03-10 21:43:51,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:51,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49814605] [2021-03-10 21:43:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:43:51,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49814605] [2021-03-10 21:43:51,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804929404] [2021-03-10 21:43:51,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:51,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:51,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:51,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:51,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:51,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:51,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:51,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251298570] [2021-03-10 21:43:51,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:51,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:51,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:51,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:51,465 INFO L87 Difference]: Start difference. First operand 154 states and 470 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:51,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:51,710 INFO L93 Difference]: Finished difference Result 234 states and 666 transitions. [2021-03-10 21:43:51,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:51,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:51,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:51,711 INFO L225 Difference]: With dead ends: 234 [2021-03-10 21:43:51,711 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:43:51,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:43:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:43:51,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 152. [2021-03-10 21:43:51,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.0596026490066226) internal successors, (462), 151 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:51,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 462 transitions. [2021-03-10 21:43:51,713 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 462 transitions. Word has length 16 [2021-03-10 21:43:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:51,713 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 462 transitions. [2021-03-10 21:43:51,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:51,714 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 462 transitions. [2021-03-10 21:43:51,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:51,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:51,714 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:51,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:51,930 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:51,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2074530712, now seen corresponding path program 15 times [2021-03-10 21:43:51,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:51,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863439430] [2021-03-10 21:43:51,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:51,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863439430] [2021-03-10 21:43:51,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:51,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:43:51,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185222198] [2021-03-10 21:43:51,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:51,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:51,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:51,968 INFO L87 Difference]: Start difference. First operand 152 states and 462 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:52,090 INFO L93 Difference]: Finished difference Result 229 states and 636 transitions. [2021-03-10 21:43:52,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:52,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:52,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:52,091 INFO L225 Difference]: With dead ends: 229 [2021-03-10 21:43:52,091 INFO L226 Difference]: Without dead ends: 225 [2021-03-10 21:43:52,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-03-10 21:43:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 154. [2021-03-10 21:43:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 3.045751633986928) internal successors, (466), 153 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 466 transitions. [2021-03-10 21:43:52,094 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 466 transitions. Word has length 16 [2021-03-10 21:43:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:52,095 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 466 transitions. [2021-03-10 21:43:52,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 466 transitions. [2021-03-10 21:43:52,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:52,095 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:52,095 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:52,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2021-03-10 21:43:52,095 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:52,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2147064104, now seen corresponding path program 16 times [2021-03-10 21:43:52,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:52,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972624920] [2021-03-10 21:43:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:52,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972624920] [2021-03-10 21:43:52,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:52,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:43:52,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015144703] [2021-03-10 21:43:52,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:52,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:52,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:52,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:52,133 INFO L87 Difference]: Start difference. First operand 154 states and 466 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:52,264 INFO L93 Difference]: Finished difference Result 212 states and 610 transitions. [2021-03-10 21:43:52,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:52,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:52,265 INFO L225 Difference]: With dead ends: 212 [2021-03-10 21:43:52,265 INFO L226 Difference]: Without dead ends: 209 [2021-03-10 21:43:52,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-03-10 21:43:52,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 153. [2021-03-10 21:43:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.0460526315789473) internal successors, (463), 152 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 463 transitions. [2021-03-10 21:43:52,269 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 463 transitions. Word has length 16 [2021-03-10 21:43:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:52,269 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 463 transitions. [2021-03-10 21:43:52,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,269 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 463 transitions. [2021-03-10 21:43:52,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:52,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:52,269 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:52,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2021-03-10 21:43:52,269 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:52,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:52,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1481357318, now seen corresponding path program 17 times [2021-03-10 21:43:52,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:52,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859440523] [2021-03-10 21:43:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:52,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859440523] [2021-03-10 21:43:52,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:52,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:43:52,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911400797] [2021-03-10 21:43:52,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:52,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:52,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:52,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:52,304 INFO L87 Difference]: Start difference. First operand 153 states and 463 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:52,388 INFO L93 Difference]: Finished difference Result 222 states and 625 transitions. [2021-03-10 21:43:52,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:52,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:52,389 INFO L225 Difference]: With dead ends: 222 [2021-03-10 21:43:52,389 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:43:52,389 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:43:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 158. [2021-03-10 21:43:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.0127388535031847) internal successors, (473), 157 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 473 transitions. [2021-03-10 21:43:52,392 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 473 transitions. Word has length 16 [2021-03-10 21:43:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:52,392 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 473 transitions. [2021-03-10 21:43:52,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 473 transitions. [2021-03-10 21:43:52,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:52,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:52,392 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:52,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2021-03-10 21:43:52,392 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:52,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:52,392 INFO L82 PathProgramCache]: Analyzing trace with hash 384029742, now seen corresponding path program 18 times [2021-03-10 21:43:52,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:52,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973788213] [2021-03-10 21:43:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:52,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973788213] [2021-03-10 21:43:52,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:52,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:43:52,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871267835] [2021-03-10 21:43:52,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:52,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:52,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:52,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:52,432 INFO L87 Difference]: Start difference. First operand 158 states and 473 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:52,505 INFO L93 Difference]: Finished difference Result 209 states and 606 transitions. [2021-03-10 21:43:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:52,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:52,505 INFO L225 Difference]: With dead ends: 209 [2021-03-10 21:43:52,505 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 21:43:52,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 21:43:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 153. [2021-03-10 21:43:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.039473684210526) internal successors, (462), 152 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 462 transitions. [2021-03-10 21:43:52,508 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 462 transitions. Word has length 16 [2021-03-10 21:43:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:52,508 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 462 transitions. [2021-03-10 21:43:52,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 462 transitions. [2021-03-10 21:43:52,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:52,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:52,508 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:52,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2021-03-10 21:43:52,508 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:52,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:52,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1323363576, now seen corresponding path program 17 times [2021-03-10 21:43:52,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:52,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749207930] [2021-03-10 21:43:52,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:52,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749207930] [2021-03-10 21:43:52,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324688835] [2021-03-10 21:43:52,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:52,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:43:52,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:52,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:52,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:52,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:52,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:52,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415985627] [2021-03-10 21:43:52,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:52,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:52,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:52,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:52,641 INFO L87 Difference]: Start difference. First operand 153 states and 462 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:52,752 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-03-10 21:43:52,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:52,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:52,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:52,753 INFO L225 Difference]: With dead ends: 214 [2021-03-10 21:43:52,753 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 21:43:52,753 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:52,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 21:43:52,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 151. [2021-03-10 21:43:52,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 3.0) internal successors, (450), 150 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 450 transitions. [2021-03-10 21:43:52,756 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 450 transitions. Word has length 16 [2021-03-10 21:43:52,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:52,756 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 450 transitions. [2021-03-10 21:43:52,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:52,756 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 450 transitions. [2021-03-10 21:43:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:52,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:52,756 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:52,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-03-10 21:43:52,957 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:52,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:52,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1610047614, now seen corresponding path program 18 times [2021-03-10 21:43:52,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:52,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007889195] [2021-03-10 21:43:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:52,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007889195] [2021-03-10 21:43:52,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:52,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:43:52,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973932688] [2021-03-10 21:43:52,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:52,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:52,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:52,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:52,998 INFO L87 Difference]: Start difference. First operand 151 states and 450 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:53,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:53,112 INFO L93 Difference]: Finished difference Result 191 states and 561 transitions. [2021-03-10 21:43:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:53,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:53,112 INFO L225 Difference]: With dead ends: 191 [2021-03-10 21:43:53,112 INFO L226 Difference]: Without dead ends: 189 [2021-03-10 21:43:53,113 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-03-10 21:43:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 145. [2021-03-10 21:43:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0277777777777777) internal successors, (436), 144 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 436 transitions. [2021-03-10 21:43:53,115 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 436 transitions. Word has length 16 [2021-03-10 21:43:53,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:53,115 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 436 transitions. [2021-03-10 21:43:53,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:53,115 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 436 transitions. [2021-03-10 21:43:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:53,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:53,116 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:53,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2021-03-10 21:43:53,116 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:53,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:53,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1975020344, now seen corresponding path program 19 times [2021-03-10 21:43:53,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:53,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349058746] [2021-03-10 21:43:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:53,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349058746] [2021-03-10 21:43:53,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409870964] [2021-03-10 21:43:53,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:53,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:53,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:53,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:53,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-03-10 21:43:53,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219220175] [2021-03-10 21:43:53,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:43:53,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:53,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:43:53,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:53,298 INFO L87 Difference]: Start difference. First operand 145 states and 436 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:53,511 INFO L93 Difference]: Finished difference Result 260 states and 749 transitions. [2021-03-10 21:43:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:53,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:53,512 INFO L225 Difference]: With dead ends: 260 [2021-03-10 21:43:53,512 INFO L226 Difference]: Without dead ends: 260 [2021-03-10 21:43:53,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-03-10 21:43:53,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 152. [2021-03-10 21:43:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.0927152317880795) internal successors, (467), 151 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 467 transitions. [2021-03-10 21:43:53,514 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 467 transitions. Word has length 16 [2021-03-10 21:43:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:53,514 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 467 transitions. [2021-03-10 21:43:53,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 467 transitions. [2021-03-10 21:43:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:53,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:53,516 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:53,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:53,716 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:53,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1124910778, now seen corresponding path program 19 times [2021-03-10 21:43:53,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:53,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409097728] [2021-03-10 21:43:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:53,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409097728] [2021-03-10 21:43:53,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949270462] [2021-03-10 21:43:53,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:43:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:53,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:53,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:53,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:53,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:43:53,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693101738] [2021-03-10 21:43:53,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:53,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:53,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:53,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:53,851 INFO L87 Difference]: Start difference. First operand 152 states and 467 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:53,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:53,954 INFO L93 Difference]: Finished difference Result 273 states and 794 transitions. [2021-03-10 21:43:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:53,954 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:53,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:53,955 INFO L225 Difference]: With dead ends: 273 [2021-03-10 21:43:53,955 INFO L226 Difference]: Without dead ends: 269 [2021-03-10 21:43:53,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:53,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-03-10 21:43:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 163. [2021-03-10 21:43:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.1049382716049383) internal successors, (503), 162 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:53,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 503 transitions. [2021-03-10 21:43:53,957 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 503 transitions. Word has length 16 [2021-03-10 21:43:53,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:53,957 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 503 transitions. [2021-03-10 21:43:53,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:53,957 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 503 transitions. [2021-03-10 21:43:53,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:53,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:53,958 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:54,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:54,163 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:54,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:54,163 INFO L82 PathProgramCache]: Analyzing trace with hash 304044328, now seen corresponding path program 20 times [2021-03-10 21:43:54,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:54,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059132496] [2021-03-10 21:43:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:54,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059132496] [2021-03-10 21:43:54,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860511234] [2021-03-10 21:43:54,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:54,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:54,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:54,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:54,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:54,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:54,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-03-10 21:43:54,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605093597] [2021-03-10 21:43:54,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:43:54,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:54,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:43:54,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:54,316 INFO L87 Difference]: Start difference. First operand 163 states and 503 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:54,504 INFO L93 Difference]: Finished difference Result 263 states and 760 transitions. [2021-03-10 21:43:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:54,505 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:54,505 INFO L225 Difference]: With dead ends: 263 [2021-03-10 21:43:54,505 INFO L226 Difference]: Without dead ends: 260 [2021-03-10 21:43:54,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:54,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-03-10 21:43:54,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 163. [2021-03-10 21:43:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.0864197530864197) internal successors, (500), 162 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 500 transitions. [2021-03-10 21:43:54,509 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 500 transitions. Word has length 16 [2021-03-10 21:43:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:54,509 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 500 transitions. [2021-03-10 21:43:54,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 500 transitions. [2021-03-10 21:43:54,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:54,509 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:54,510 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:54,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:54,723 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:54,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:54,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1230067772, now seen corresponding path program 20 times [2021-03-10 21:43:54,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:54,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36707394] [2021-03-10 21:43:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:54,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36707394] [2021-03-10 21:43:54,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616043547] [2021-03-10 21:43:54,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:54,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:54,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:54,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:54,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:54,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:54,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:43:54,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249403110] [2021-03-10 21:43:54,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:43:54,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:54,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:43:54,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:43:54,848 INFO L87 Difference]: Start difference. First operand 163 states and 500 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:54,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:54,978 INFO L93 Difference]: Finished difference Result 281 states and 820 transitions. [2021-03-10 21:43:54,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:54,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:54,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:54,979 INFO L225 Difference]: With dead ends: 281 [2021-03-10 21:43:54,979 INFO L226 Difference]: Without dead ends: 281 [2021-03-10 21:43:54,979 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:54,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-03-10 21:43:54,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 160. [2021-03-10 21:43:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.088050314465409) internal successors, (491), 159 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 491 transitions. [2021-03-10 21:43:54,983 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 491 transitions. Word has length 16 [2021-03-10 21:43:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:54,983 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 491 transitions. [2021-03-10 21:43:54,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 491 transitions. [2021-03-10 21:43:54,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:54,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:54,983 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:55,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-03-10 21:43:55,199 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:55,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:55,199 INFO L82 PathProgramCache]: Analyzing trace with hash -569696352, now seen corresponding path program 21 times [2021-03-10 21:43:55,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:55,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515392749] [2021-03-10 21:43:55,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:55,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515392749] [2021-03-10 21:43:55,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253951246] [2021-03-10 21:43:55,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:55,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:55,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:55,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:55,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:55,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:55,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-03-10 21:43:55,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120709809] [2021-03-10 21:43:55,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:43:55,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:55,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:43:55,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:55,351 INFO L87 Difference]: Start difference. First operand 160 states and 491 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:55,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:55,553 INFO L93 Difference]: Finished difference Result 253 states and 725 transitions. [2021-03-10 21:43:55,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:55,554 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:55,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:55,554 INFO L225 Difference]: With dead ends: 253 [2021-03-10 21:43:55,554 INFO L226 Difference]: Without dead ends: 247 [2021-03-10 21:43:55,554 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:43:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-03-10 21:43:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 160. [2021-03-10 21:43:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.069182389937107) internal successors, (488), 159 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 488 transitions. [2021-03-10 21:43:55,557 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 488 transitions. Word has length 16 [2021-03-10 21:43:55,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:55,557 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 488 transitions. [2021-03-10 21:43:55,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:55,557 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 488 transitions. [2021-03-10 21:43:55,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:55,558 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:55,558 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:55,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-03-10 21:43:55,759 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:55,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1211633746, now seen corresponding path program 21 times [2021-03-10 21:43:55,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:55,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259580736] [2021-03-10 21:43:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:55,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259580736] [2021-03-10 21:43:55,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288349141] [2021-03-10 21:43:55,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:55,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:43:55,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:55,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:55,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:55,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:55,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:43:55,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555320070] [2021-03-10 21:43:55,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:43:55,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:55,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:43:55,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:43:55,851 INFO L87 Difference]: Start difference. First operand 160 states and 488 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:55,975 INFO L93 Difference]: Finished difference Result 294 states and 862 transitions. [2021-03-10 21:43:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:55,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:55,977 INFO L225 Difference]: With dead ends: 294 [2021-03-10 21:43:55,977 INFO L226 Difference]: Without dead ends: 294 [2021-03-10 21:43:55,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-03-10 21:43:55,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 157. [2021-03-10 21:43:55,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 3.0705128205128207) internal successors, (479), 156 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:55,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 479 transitions. [2021-03-10 21:43:55,980 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 479 transitions. Word has length 16 [2021-03-10 21:43:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:55,981 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 479 transitions. [2021-03-10 21:43:55,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 479 transitions. [2021-03-10 21:43:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:55,981 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:55,981 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:56,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:56,191 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:56,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1044998274, now seen corresponding path program 22 times [2021-03-10 21:43:56,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:56,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148543461] [2021-03-10 21:43:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:56,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148543461] [2021-03-10 21:43:56,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327758138] [2021-03-10 21:43:56,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:56,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:56,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:56,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:56,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:56,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:56,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928602269] [2021-03-10 21:43:56,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:56,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:56,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:56,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:56,316 INFO L87 Difference]: Start difference. First operand 157 states and 479 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:56,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:56,411 INFO L93 Difference]: Finished difference Result 282 states and 801 transitions. [2021-03-10 21:43:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:56,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:56,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:56,412 INFO L225 Difference]: With dead ends: 282 [2021-03-10 21:43:56,412 INFO L226 Difference]: Without dead ends: 282 [2021-03-10 21:43:56,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-03-10 21:43:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 165. [2021-03-10 21:43:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 3.1646341463414633) internal successors, (519), 164 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 519 transitions. [2021-03-10 21:43:56,415 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 519 transitions. Word has length 16 [2021-03-10 21:43:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:56,415 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 519 transitions. [2021-03-10 21:43:56,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 519 transitions. [2021-03-10 21:43:56,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:56,416 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:56,416 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:56,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:56,632 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:56,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:56,632 INFO L82 PathProgramCache]: Analyzing trace with hash 150037900, now seen corresponding path program 22 times [2021-03-10 21:43:56,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:56,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595951466] [2021-03-10 21:43:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:56,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595951466] [2021-03-10 21:43:56,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007412306] [2021-03-10 21:43:56,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:43:56,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:43:56,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:56,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:56,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:56,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:56,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:56,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129134671] [2021-03-10 21:43:56,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:56,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:56,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:56,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:56,801 INFO L87 Difference]: Start difference. First operand 165 states and 519 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:56,894 INFO L93 Difference]: Finished difference Result 288 states and 815 transitions. [2021-03-10 21:43:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:56,895 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:56,895 INFO L225 Difference]: With dead ends: 288 [2021-03-10 21:43:56,895 INFO L226 Difference]: Without dead ends: 284 [2021-03-10 21:43:56,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:56,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-03-10 21:43:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 169. [2021-03-10 21:43:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.1904761904761907) internal successors, (536), 168 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 536 transitions. [2021-03-10 21:43:56,898 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 536 transitions. Word has length 16 [2021-03-10 21:43:56,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:56,898 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 536 transitions. [2021-03-10 21:43:56,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 536 transitions. [2021-03-10 21:43:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:56,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:56,903 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:57,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:57,121 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1578993006, now seen corresponding path program 23 times [2021-03-10 21:43:57,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:57,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354274825] [2021-03-10 21:43:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:57,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354274825] [2021-03-10 21:43:57,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366447268] [2021-03-10 21:43:57,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:43:57,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:57,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:57,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:57,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:57,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:57,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:57,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170379472] [2021-03-10 21:43:57,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:57,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:57,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:57,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:57,273 INFO L87 Difference]: Start difference. First operand 169 states and 536 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:57,386 INFO L93 Difference]: Finished difference Result 275 states and 778 transitions. [2021-03-10 21:43:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:57,386 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:57,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:57,387 INFO L225 Difference]: With dead ends: 275 [2021-03-10 21:43:57,387 INFO L226 Difference]: Without dead ends: 272 [2021-03-10 21:43:57,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-03-10 21:43:57,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 172. [2021-03-10 21:43:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 3.152046783625731) internal successors, (539), 171 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 539 transitions. [2021-03-10 21:43:57,391 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 539 transitions. Word has length 16 [2021-03-10 21:43:57,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:57,391 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 539 transitions. [2021-03-10 21:43:57,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:57,391 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 539 transitions. [2021-03-10 21:43:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:57,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:57,392 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:57,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:57,607 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:57,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1789950846, now seen corresponding path program 23 times [2021-03-10 21:43:57,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:57,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6201901] [2021-03-10 21:43:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:57,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6201901] [2021-03-10 21:43:57,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265796291] [2021-03-10 21:43:57,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:57,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:57,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:57,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:57,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:57,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:57,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427957477] [2021-03-10 21:43:57,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:57,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:57,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:57,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:57,738 INFO L87 Difference]: Start difference. First operand 172 states and 539 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:57,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:57,854 INFO L93 Difference]: Finished difference Result 295 states and 843 transitions. [2021-03-10 21:43:57,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:57,854 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:57,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:57,855 INFO L225 Difference]: With dead ends: 295 [2021-03-10 21:43:57,855 INFO L226 Difference]: Without dead ends: 295 [2021-03-10 21:43:57,855 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-03-10 21:43:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 166. [2021-03-10 21:43:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.121212121212121) internal successors, (515), 165 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 515 transitions. [2021-03-10 21:43:57,858 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 515 transitions. Word has length 16 [2021-03-10 21:43:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:57,858 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 515 transitions. [2021-03-10 21:43:57,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 515 transitions. [2021-03-10 21:43:57,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:57,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:57,858 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:58,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-03-10 21:43:58,063 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:58,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:58,063 INFO L82 PathProgramCache]: Analyzing trace with hash -702414762, now seen corresponding path program 24 times [2021-03-10 21:43:58,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:58,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128506652] [2021-03-10 21:43:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:58,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128506652] [2021-03-10 21:43:58,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024604817] [2021-03-10 21:43:58,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:58,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:43:58,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:58,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:58,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:58,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:58,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:43:58,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536330992] [2021-03-10 21:43:58,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:43:58,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:58,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:43:58,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:58,204 INFO L87 Difference]: Start difference. First operand 166 states and 515 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:58,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:58,343 INFO L93 Difference]: Finished difference Result 254 states and 721 transitions. [2021-03-10 21:43:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:58,344 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:58,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:58,344 INFO L225 Difference]: With dead ends: 254 [2021-03-10 21:43:58,344 INFO L226 Difference]: Without dead ends: 254 [2021-03-10 21:43:58,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:43:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-03-10 21:43:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 161. [2021-03-10 21:43:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.10625) internal successors, (497), 160 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 497 transitions. [2021-03-10 21:43:58,347 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 497 transitions. Word has length 16 [2021-03-10 21:43:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:58,347 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 497 transitions. [2021-03-10 21:43:58,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:58,347 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 497 transitions. [2021-03-10 21:43:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:58,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:58,348 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:58,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:58,548 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:58,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:58,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1269298592, now seen corresponding path program 25 times [2021-03-10 21:43:58,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:58,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910312097] [2021-03-10 21:43:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:43:58,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910312097] [2021-03-10 21:43:58,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502148332] [2021-03-10 21:43:58,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:58,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:58,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:58,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:58,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:43:58,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873243471] [2021-03-10 21:43:58,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:43:58,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:58,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:43:58,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:43:58,731 INFO L87 Difference]: Start difference. First operand 161 states and 497 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:58,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:58,954 INFO L93 Difference]: Finished difference Result 232 states and 667 transitions. [2021-03-10 21:43:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:58,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:58,956 INFO L225 Difference]: With dead ends: 232 [2021-03-10 21:43:58,956 INFO L226 Difference]: Without dead ends: 230 [2021-03-10 21:43:58,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:43:58,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-03-10 21:43:58,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 159. [2021-03-10 21:43:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.0949367088607596) internal successors, (489), 158 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 489 transitions. [2021-03-10 21:43:58,959 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 489 transitions. Word has length 16 [2021-03-10 21:43:58,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:58,959 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 489 transitions. [2021-03-10 21:43:58,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:58,959 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 489 transitions. [2021-03-10 21:43:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:58,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:58,960 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:59,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-03-10 21:43:59,181 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:59,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:59,182 INFO L82 PathProgramCache]: Analyzing trace with hash -591395774, now seen corresponding path program 24 times [2021-03-10 21:43:59,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:59,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700982746] [2021-03-10 21:43:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:59,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700982746] [2021-03-10 21:43:59,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:59,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:43:59,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031887580] [2021-03-10 21:43:59,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:59,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:59,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:59,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:59,217 INFO L87 Difference]: Start difference. First operand 159 states and 489 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:59,320 INFO L93 Difference]: Finished difference Result 244 states and 679 transitions. [2021-03-10 21:43:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:59,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:59,321 INFO L225 Difference]: With dead ends: 244 [2021-03-10 21:43:59,321 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:43:59,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:43:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 161. [2021-03-10 21:43:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.08125) internal successors, (493), 160 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 493 transitions. [2021-03-10 21:43:59,325 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 493 transitions. Word has length 16 [2021-03-10 21:43:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:59,325 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 493 transitions. [2021-03-10 21:43:59,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 493 transitions. [2021-03-10 21:43:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:59,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:59,325 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:59,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273 [2021-03-10 21:43:59,325 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:59,326 INFO L82 PathProgramCache]: Analyzing trace with hash -664768254, now seen corresponding path program 25 times [2021-03-10 21:43:59,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:59,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632607510] [2021-03-10 21:43:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:59,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632607510] [2021-03-10 21:43:59,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:59,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:43:59,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828937467] [2021-03-10 21:43:59,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:59,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:59,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:59,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:59,360 INFO L87 Difference]: Start difference. First operand 161 states and 493 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:59,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:59,463 INFO L93 Difference]: Finished difference Result 227 states and 653 transitions. [2021-03-10 21:43:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:59,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:59,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:59,464 INFO L225 Difference]: With dead ends: 227 [2021-03-10 21:43:59,464 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 21:43:59,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:59,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 21:43:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 160. [2021-03-10 21:43:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0817610062893084) internal successors, (490), 159 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 490 transitions. [2021-03-10 21:43:59,471 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 490 transitions. Word has length 16 [2021-03-10 21:43:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:59,471 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 490 transitions. [2021-03-10 21:43:59,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 490 transitions. [2021-03-10 21:43:59,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:59,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:59,472 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:59,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2021-03-10 21:43:59,472 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:59,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:59,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1330475040, now seen corresponding path program 26 times [2021-03-10 21:43:59,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:59,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407748692] [2021-03-10 21:43:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:59,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407748692] [2021-03-10 21:43:59,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:59,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:43:59,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413980314] [2021-03-10 21:43:59,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:59,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:59,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:59,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:59,509 INFO L87 Difference]: Start difference. First operand 160 states and 490 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:59,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:59,637 INFO L93 Difference]: Finished difference Result 242 states and 676 transitions. [2021-03-10 21:43:59,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:59,638 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:59,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:59,638 INFO L225 Difference]: With dead ends: 242 [2021-03-10 21:43:59,638 INFO L226 Difference]: Without dead ends: 239 [2021-03-10 21:43:59,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-03-10 21:43:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 165. [2021-03-10 21:43:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 3.048780487804878) internal successors, (500), 164 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 500 transitions. [2021-03-10 21:43:59,642 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 500 transitions. Word has length 16 [2021-03-10 21:43:59,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:59,642 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 500 transitions. [2021-03-10 21:43:59,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 500 transitions. [2021-03-10 21:43:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:59,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:59,642 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:59,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275 [2021-03-10 21:43:59,642 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:59,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:59,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1867164680, now seen corresponding path program 27 times [2021-03-10 21:43:59,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:59,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78689496] [2021-03-10 21:43:59,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:59,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78689496] [2021-03-10 21:43:59,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:43:59,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:43:59,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899537069] [2021-03-10 21:43:59,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:43:59,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:59,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:43:59,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:43:59,687 INFO L87 Difference]: Start difference. First operand 165 states and 500 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:59,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:43:59,818 INFO L93 Difference]: Finished difference Result 229 states and 657 transitions. [2021-03-10 21:43:59,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:43:59,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:43:59,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:43:59,819 INFO L225 Difference]: With dead ends: 229 [2021-03-10 21:43:59,819 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 21:43:59,819 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:43:59,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 21:43:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 160. [2021-03-10 21:43:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0754716981132075) internal successors, (489), 159 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 489 transitions. [2021-03-10 21:43:59,822 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 489 transitions. Word has length 16 [2021-03-10 21:43:59,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:43:59,822 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 489 transitions. [2021-03-10 21:43:59,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:43:59,822 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 489 transitions. [2021-03-10 21:43:59,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:43:59,823 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:43:59,823 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:43:59,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2021-03-10 21:43:59,823 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:43:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:43:59,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1488468782, now seen corresponding path program 26 times [2021-03-10 21:43:59,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:43:59,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105128492] [2021-03-10 21:43:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:43:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:43:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:59,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105128492] [2021-03-10 21:43:59,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968819743] [2021-03-10 21:43:59,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:43:59,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:43:59,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:43:59,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:43:59,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:43:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:43:59,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:43:59,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:43:59,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166203102] [2021-03-10 21:43:59,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:43:59,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:43:59,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:43:59,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:43:59,962 INFO L87 Difference]: Start difference. First operand 160 states and 489 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:00,060 INFO L93 Difference]: Finished difference Result 257 states and 727 transitions. [2021-03-10 21:44:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:00,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:00,061 INFO L225 Difference]: With dead ends: 257 [2021-03-10 21:44:00,061 INFO L226 Difference]: Without dead ends: 257 [2021-03-10 21:44:00,061 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:00,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-03-10 21:44:00,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 162. [2021-03-10 21:44:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 3.0869565217391304) internal successors, (497), 161 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 497 transitions. [2021-03-10 21:44:00,064 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 497 transitions. Word has length 16 [2021-03-10 21:44:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:00,064 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 497 transitions. [2021-03-10 21:44:00,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 497 transitions. [2021-03-10 21:44:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:00,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:00,064 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:00,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-03-10 21:44:00,265 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:00,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:00,265 INFO L82 PathProgramCache]: Analyzing trace with hash -126912676, now seen corresponding path program 27 times [2021-03-10 21:44:00,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:00,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918529696] [2021-03-10 21:44:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:00,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918529696] [2021-03-10 21:44:00,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:00,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:00,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923442023] [2021-03-10 21:44:00,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:00,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:00,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:00,312 INFO L87 Difference]: Start difference. First operand 162 states and 497 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:00,430 INFO L93 Difference]: Finished difference Result 234 states and 674 transitions. [2021-03-10 21:44:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:00,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:00,432 INFO L225 Difference]: With dead ends: 234 [2021-03-10 21:44:00,432 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:44:00,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:44:00,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 159. [2021-03-10 21:44:00,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.0759493670886076) internal successors, (486), 158 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 486 transitions. [2021-03-10 21:44:00,435 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 486 transitions. Word has length 16 [2021-03-10 21:44:00,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:00,435 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 486 transitions. [2021-03-10 21:44:00,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,435 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 486 transitions. [2021-03-10 21:44:00,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:00,435 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:00,435 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:00,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278 [2021-03-10 21:44:00,436 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:00,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:00,436 INFO L82 PathProgramCache]: Analyzing trace with hash -568892562, now seen corresponding path program 28 times [2021-03-10 21:44:00,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:00,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066631772] [2021-03-10 21:44:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:00,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066631772] [2021-03-10 21:44:00,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:00,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:00,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144898724] [2021-03-10 21:44:00,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:00,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:00,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:00,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:00,474 INFO L87 Difference]: Start difference. First operand 159 states and 486 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:00,599 INFO L93 Difference]: Finished difference Result 213 states and 612 transitions. [2021-03-10 21:44:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:00,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:00,600 INFO L225 Difference]: With dead ends: 213 [2021-03-10 21:44:00,600 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 21:44:00,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 21:44:00,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 160. [2021-03-10 21:44:00,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0628930817610063) internal successors, (487), 159 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 487 transitions. [2021-03-10 21:44:00,603 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 487 transitions. Word has length 16 [2021-03-10 21:44:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:00,603 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 487 transitions. [2021-03-10 21:44:00,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,603 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 487 transitions. [2021-03-10 21:44:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:00,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:00,605 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:00,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2021-03-10 21:44:00,606 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:00,606 INFO L82 PathProgramCache]: Analyzing trace with hash 857708136, now seen corresponding path program 29 times [2021-03-10 21:44:00,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:00,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834775815] [2021-03-10 21:44:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:00,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834775815] [2021-03-10 21:44:00,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:00,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:00,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527897503] [2021-03-10 21:44:00,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:00,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:00,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:00,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:00,646 INFO L87 Difference]: Start difference. First operand 160 states and 487 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:00,792 INFO L93 Difference]: Finished difference Result 210 states and 602 transitions. [2021-03-10 21:44:00,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:00,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:00,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:00,793 INFO L225 Difference]: With dead ends: 210 [2021-03-10 21:44:00,793 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 21:44:00,793 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 21:44:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 165. [2021-03-10 21:44:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 3.0304878048780486) internal successors, (497), 164 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 497 transitions. [2021-03-10 21:44:00,798 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 497 transitions. Word has length 16 [2021-03-10 21:44:00,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:00,798 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 497 transitions. [2021-03-10 21:44:00,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,798 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 497 transitions. [2021-03-10 21:44:00,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:00,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:00,799 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:00,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280 [2021-03-10 21:44:00,799 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:00,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:00,799 INFO L82 PathProgramCache]: Analyzing trace with hash -239619440, now seen corresponding path program 30 times [2021-03-10 21:44:00,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:00,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143186545] [2021-03-10 21:44:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:00,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143186545] [2021-03-10 21:44:00,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:00,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:00,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497587004] [2021-03-10 21:44:00,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:00,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:00,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:00,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:00,839 INFO L87 Difference]: Start difference. First operand 165 states and 497 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:00,968 INFO L93 Difference]: Finished difference Result 197 states and 583 transitions. [2021-03-10 21:44:00,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:00,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:00,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:00,969 INFO L225 Difference]: With dead ends: 197 [2021-03-10 21:44:00,969 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 21:44:00,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 21:44:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 159. [2021-03-10 21:44:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.069620253164557) internal successors, (485), 158 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 485 transitions. [2021-03-10 21:44:00,972 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 485 transitions. Word has length 16 [2021-03-10 21:44:00,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:00,972 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 485 transitions. [2021-03-10 21:44:00,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 485 transitions. [2021-03-10 21:44:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:00,973 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:00,973 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:00,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281 [2021-03-10 21:44:00,973 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1967643138, now seen corresponding path program 28 times [2021-03-10 21:44:00,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:00,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538341307] [2021-03-10 21:44:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:01,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538341307] [2021-03-10 21:44:01,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847131863] [2021-03-10 21:44:01,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:01,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:01,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:01,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:01,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:01,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:01,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:44:01,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578069607] [2021-03-10 21:44:01,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:44:01,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:01,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:44:01,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:44:01,087 INFO L87 Difference]: Start difference. First operand 159 states and 485 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:01,199 INFO L93 Difference]: Finished difference Result 266 states and 770 transitions. [2021-03-10 21:44:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:01,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:01,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:01,201 INFO L225 Difference]: With dead ends: 266 [2021-03-10 21:44:01,201 INFO L226 Difference]: Without dead ends: 266 [2021-03-10 21:44:01,201 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:01,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-03-10 21:44:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 157. [2021-03-10 21:44:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 3.0448717948717947) internal successors, (475), 156 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 475 transitions. [2021-03-10 21:44:01,204 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 475 transitions. Word has length 16 [2021-03-10 21:44:01,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:01,204 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 475 transitions. [2021-03-10 21:44:01,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 475 transitions. [2021-03-10 21:44:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:01,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:01,205 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:01,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-03-10 21:44:01,426 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:01,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:01,426 INFO L82 PathProgramCache]: Analyzing trace with hash -900723460, now seen corresponding path program 29 times [2021-03-10 21:44:01,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:01,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544807939] [2021-03-10 21:44:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:44:01,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544807939] [2021-03-10 21:44:01,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204503484] [2021-03-10 21:44:01,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:01,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:44:01,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:01,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:01,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:01,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:01,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:44:01,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935755244] [2021-03-10 21:44:01,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:01,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:01,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:01,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:01,594 INFO L87 Difference]: Start difference. First operand 157 states and 475 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:01,890 INFO L93 Difference]: Finished difference Result 243 states and 691 transitions. [2021-03-10 21:44:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:44:01,890 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:01,891 INFO L225 Difference]: With dead ends: 243 [2021-03-10 21:44:01,891 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:44:01,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:44:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:44:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 147. [2021-03-10 21:44:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.0342465753424657) internal successors, (443), 146 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 443 transitions. [2021-03-10 21:44:01,893 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 443 transitions. Word has length 16 [2021-03-10 21:44:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:01,893 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 443 transitions. [2021-03-10 21:44:01,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 443 transitions. [2021-03-10 21:44:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:01,894 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:01,894 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:02,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:02,094 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:02,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:02,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1038652820, now seen corresponding path program 31 times [2021-03-10 21:44:02,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:02,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147395312] [2021-03-10 21:44:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:02,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147395312] [2021-03-10 21:44:02,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122259514] [2021-03-10 21:44:02,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:02,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:02,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:02,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:02,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-10 21:44:02,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596002873] [2021-03-10 21:44:02,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:02,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:02,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:02,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:02,257 INFO L87 Difference]: Start difference. First operand 147 states and 443 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:02,435 INFO L93 Difference]: Finished difference Result 224 states and 647 transitions. [2021-03-10 21:44:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:02,435 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:02,435 INFO L225 Difference]: With dead ends: 224 [2021-03-10 21:44:02,436 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 21:44:02,436 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:44:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 21:44:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 147. [2021-03-10 21:44:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.0342465753424657) internal successors, (443), 146 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 443 transitions. [2021-03-10 21:44:02,438 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 443 transitions. Word has length 16 [2021-03-10 21:44:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:02,438 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 443 transitions. [2021-03-10 21:44:02,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 443 transitions. [2021-03-10 21:44:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:02,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:02,438 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:02,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:02,639 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1592318946, now seen corresponding path program 30 times [2021-03-10 21:44:02,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:02,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771179526] [2021-03-10 21:44:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:02,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771179526] [2021-03-10 21:44:02,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204019001] [2021-03-10 21:44:02,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:02,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:44:02,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:02,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:02,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:02,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:02,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:44:02,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936096416] [2021-03-10 21:44:02,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:44:02,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:02,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:44:02,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:02,771 INFO L87 Difference]: Start difference. First operand 147 states and 443 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:02,857 INFO L93 Difference]: Finished difference Result 244 states and 672 transitions. [2021-03-10 21:44:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:02,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:02,858 INFO L225 Difference]: With dead ends: 244 [2021-03-10 21:44:02,858 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 21:44:02,858 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:02,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 21:44:02,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 147. [2021-03-10 21:44:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.0) internal successors, (438), 146 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 438 transitions. [2021-03-10 21:44:02,861 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 438 transitions. Word has length 16 [2021-03-10 21:44:02,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:02,861 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 438 transitions. [2021-03-10 21:44:02,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:02,861 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 438 transitions. [2021-03-10 21:44:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:02,861 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:02,861 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:03,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:03,081 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:03,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:03,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1253778718, now seen corresponding path program 32 times [2021-03-10 21:44:03,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:03,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103457296] [2021-03-10 21:44:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:03,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103457296] [2021-03-10 21:44:03,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095983375] [2021-03-10 21:44:03,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:03,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:03,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:03,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:03,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:03,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:03,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-10 21:44:03,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100496547] [2021-03-10 21:44:03,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:03,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:03,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:03,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:03,221 INFO L87 Difference]: Start difference. First operand 147 states and 438 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:03,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:03,382 INFO L93 Difference]: Finished difference Result 248 states and 707 transitions. [2021-03-10 21:44:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:03,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:03,383 INFO L225 Difference]: With dead ends: 248 [2021-03-10 21:44:03,384 INFO L226 Difference]: Without dead ends: 248 [2021-03-10 21:44:03,384 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:44:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-03-10 21:44:03,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 153. [2021-03-10 21:44:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.0789473684210527) internal successors, (468), 152 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 468 transitions. [2021-03-10 21:44:03,388 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 468 transitions. Word has length 16 [2021-03-10 21:44:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:03,388 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 468 transitions. [2021-03-10 21:44:03,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 468 transitions. [2021-03-10 21:44:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:03,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:03,388 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:03,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-03-10 21:44:03,611 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:03,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:03,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1846152404, now seen corresponding path program 31 times [2021-03-10 21:44:03,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:03,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452485949] [2021-03-10 21:44:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:03,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452485949] [2021-03-10 21:44:03,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623607261] [2021-03-10 21:44:03,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:03,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:03,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:03,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:03,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:03,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425430730] [2021-03-10 21:44:03,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:03,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:03,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:03,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:03,772 INFO L87 Difference]: Start difference. First operand 153 states and 468 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:03,859 INFO L93 Difference]: Finished difference Result 264 states and 730 transitions. [2021-03-10 21:44:03,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:03,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:03,860 INFO L225 Difference]: With dead ends: 264 [2021-03-10 21:44:03,860 INFO L226 Difference]: Without dead ends: 260 [2021-03-10 21:44:03,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:03,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-03-10 21:44:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 160. [2021-03-10 21:44:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.069182389937107) internal successors, (488), 159 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 488 transitions. [2021-03-10 21:44:03,862 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 488 transitions. Word has length 16 [2021-03-10 21:44:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:03,863 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 488 transitions. [2021-03-10 21:44:03,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:03,863 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 488 transitions. [2021-03-10 21:44:03,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:03,863 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:03,863 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:04,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-03-10 21:44:04,064 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:04,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:04,064 INFO L82 PathProgramCache]: Analyzing trace with hash -417197298, now seen corresponding path program 33 times [2021-03-10 21:44:04,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:04,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510262011] [2021-03-10 21:44:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:04,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510262011] [2021-03-10 21:44:04,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947377011] [2021-03-10 21:44:04,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:04,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:44:04,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:04,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:04,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:04,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:04,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-10 21:44:04,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706519668] [2021-03-10 21:44:04,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:04,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:04,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:04,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:04,205 INFO L87 Difference]: Start difference. First operand 160 states and 488 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:04,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:04,340 INFO L93 Difference]: Finished difference Result 231 states and 665 transitions. [2021-03-10 21:44:04,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:04,340 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:04,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:04,340 INFO L225 Difference]: With dead ends: 231 [2021-03-10 21:44:04,341 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 21:44:04,341 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:44:04,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 21:44:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 163. [2021-03-10 21:44:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.0308641975308643) internal successors, (491), 162 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 491 transitions. [2021-03-10 21:44:04,343 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 491 transitions. Word has length 16 [2021-03-10 21:44:04,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:04,343 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 491 transitions. [2021-03-10 21:44:04,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 491 transitions. [2021-03-10 21:44:04,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:04,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:04,343 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:04,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:04,544 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:04,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:04,544 INFO L82 PathProgramCache]: Analyzing trace with hash 508826146, now seen corresponding path program 32 times [2021-03-10 21:44:04,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:04,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042045231] [2021-03-10 21:44:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:04,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042045231] [2021-03-10 21:44:04,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682305215] [2021-03-10 21:44:04,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:04,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:04,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:04,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:04,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:04,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:04,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:04,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67604735] [2021-03-10 21:44:04,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:04,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:04,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:04,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:04,671 INFO L87 Difference]: Start difference. First operand 163 states and 491 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:04,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:04,770 INFO L93 Difference]: Finished difference Result 249 states and 699 transitions. [2021-03-10 21:44:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:04,771 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:04,771 INFO L225 Difference]: With dead ends: 249 [2021-03-10 21:44:04,771 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 21:44:04,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:04,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 21:44:04,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 148. [2021-03-10 21:44:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.020408163265306) internal successors, (444), 147 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 444 transitions. [2021-03-10 21:44:04,773 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 444 transitions. Word has length 16 [2021-03-10 21:44:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:04,774 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 444 transitions. [2021-03-10 21:44:04,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 444 transitions. [2021-03-10 21:44:04,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:04,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:04,774 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:04,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:04,974 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:04,975 INFO L82 PathProgramCache]: Analyzing trace with hash 991501460, now seen corresponding path program 34 times [2021-03-10 21:44:04,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:04,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933535331] [2021-03-10 21:44:04,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:05,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933535331] [2021-03-10 21:44:05,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932392856] [2021-03-10 21:44:05,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:05,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:05,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:05,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:05,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:05,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:05,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:44:05,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570755839] [2021-03-10 21:44:05,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:44:05,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:05,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:44:05,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:44:05,080 INFO L87 Difference]: Start difference. First operand 148 states and 444 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:05,172 INFO L93 Difference]: Finished difference Result 304 states and 875 transitions. [2021-03-10 21:44:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:05,172 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:05,173 INFO L225 Difference]: With dead ends: 304 [2021-03-10 21:44:05,173 INFO L226 Difference]: Without dead ends: 304 [2021-03-10 21:44:05,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-03-10 21:44:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 152. [2021-03-10 21:44:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.019867549668874) internal successors, (456), 151 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 456 transitions. [2021-03-10 21:44:05,175 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 456 transitions. Word has length 16 [2021-03-10 21:44:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:05,175 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 456 transitions. [2021-03-10 21:44:05,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 456 transitions. [2021-03-10 21:44:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:05,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:05,176 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:05,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:05,376 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:05,377 INFO L82 PathProgramCache]: Analyzing trace with hash -501516022, now seen corresponding path program 35 times [2021-03-10 21:44:05,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:05,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461445890] [2021-03-10 21:44:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:05,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461445890] [2021-03-10 21:44:05,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862881644] [2021-03-10 21:44:05,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:05,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:05,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:05,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:05,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:44:05,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979362755] [2021-03-10 21:44:05,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:44:05,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:05,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:44:05,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:44:05,479 INFO L87 Difference]: Start difference. First operand 152 states and 456 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:05,596 INFO L93 Difference]: Finished difference Result 279 states and 796 transitions. [2021-03-10 21:44:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:05,597 INFO L225 Difference]: With dead ends: 279 [2021-03-10 21:44:05,597 INFO L226 Difference]: Without dead ends: 279 [2021-03-10 21:44:05,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:05,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-03-10 21:44:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 154. [2021-03-10 21:44:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 3.0326797385620914) internal successors, (464), 153 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 464 transitions. [2021-03-10 21:44:05,601 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 464 transitions. Word has length 16 [2021-03-10 21:44:05,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:05,601 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 464 transitions. [2021-03-10 21:44:05,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:05,601 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 464 transitions. [2021-03-10 21:44:05,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:05,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:05,602 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:05,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:05,815 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:05,815 INFO L82 PathProgramCache]: Analyzing trace with hash 108641226, now seen corresponding path program 36 times [2021-03-10 21:44:05,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:05,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261725574] [2021-03-10 21:44:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:05,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261725574] [2021-03-10 21:44:05,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325674343] [2021-03-10 21:44:05,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:05,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:44:05,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:05,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:05,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:05,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:05,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:44:05,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424584499] [2021-03-10 21:44:05,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:44:05,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:05,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:44:05,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:44:05,959 INFO L87 Difference]: Start difference. First operand 154 states and 464 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:06,097 INFO L93 Difference]: Finished difference Result 255 states and 738 transitions. [2021-03-10 21:44:06,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:06,097 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:06,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:06,098 INFO L225 Difference]: With dead ends: 255 [2021-03-10 21:44:06,098 INFO L226 Difference]: Without dead ends: 253 [2021-03-10 21:44:06,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:06,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-03-10 21:44:06,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 148. [2021-03-10 21:44:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.020408163265306) internal successors, (444), 147 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 444 transitions. [2021-03-10 21:44:06,101 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 444 transitions. Word has length 16 [2021-03-10 21:44:06,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:06,101 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 444 transitions. [2021-03-10 21:44:06,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 444 transitions. [2021-03-10 21:44:06,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:06,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:06,102 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:06,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-03-10 21:44:06,320 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:06,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:06,320 INFO L82 PathProgramCache]: Analyzing trace with hash 82711532, now seen corresponding path program 33 times [2021-03-10 21:44:06,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:06,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79542487] [2021-03-10 21:44:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:06,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79542487] [2021-03-10 21:44:06,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:06,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:06,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439728969] [2021-03-10 21:44:06,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:06,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:06,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:06,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:06,354 INFO L87 Difference]: Start difference. First operand 148 states and 444 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:06,433 INFO L93 Difference]: Finished difference Result 276 states and 746 transitions. [2021-03-10 21:44:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:06,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:06,434 INFO L225 Difference]: With dead ends: 276 [2021-03-10 21:44:06,434 INFO L226 Difference]: Without dead ends: 266 [2021-03-10 21:44:06,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:06,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-03-10 21:44:06,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 150. [2021-03-10 21:44:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.9932885906040267) internal successors, (446), 149 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 446 transitions. [2021-03-10 21:44:06,436 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 446 transitions. Word has length 16 [2021-03-10 21:44:06,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:06,436 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 446 transitions. [2021-03-10 21:44:06,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,436 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 446 transitions. [2021-03-10 21:44:06,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:06,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:06,436 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:06,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301 [2021-03-10 21:44:06,436 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:06,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1741550036, now seen corresponding path program 34 times [2021-03-10 21:44:06,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:06,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984882311] [2021-03-10 21:44:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:06,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984882311] [2021-03-10 21:44:06,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:06,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:06,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703657227] [2021-03-10 21:44:06,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:06,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:06,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:06,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:06,479 INFO L87 Difference]: Start difference. First operand 150 states and 446 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:06,584 INFO L93 Difference]: Finished difference Result 269 states and 726 transitions. [2021-03-10 21:44:06,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:06,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:06,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:06,585 INFO L225 Difference]: With dead ends: 269 [2021-03-10 21:44:06,585 INFO L226 Difference]: Without dead ends: 265 [2021-03-10 21:44:06,585 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-03-10 21:44:06,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 156. [2021-03-10 21:44:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9548387096774196) internal successors, (458), 155 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 458 transitions. [2021-03-10 21:44:06,588 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 458 transitions. Word has length 16 [2021-03-10 21:44:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:06,588 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 458 transitions. [2021-03-10 21:44:06,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,588 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 458 transitions. [2021-03-10 21:44:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:06,588 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:06,589 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:06,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302 [2021-03-10 21:44:06,589 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1814922516, now seen corresponding path program 35 times [2021-03-10 21:44:06,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:06,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296874610] [2021-03-10 21:44:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:06,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296874610] [2021-03-10 21:44:06,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:06,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:06,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949566703] [2021-03-10 21:44:06,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:06,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:06,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:06,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:06,625 INFO L87 Difference]: Start difference. First operand 156 states and 458 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:06,712 INFO L93 Difference]: Finished difference Result 254 states and 704 transitions. [2021-03-10 21:44:06,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:06,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:06,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:06,714 INFO L225 Difference]: With dead ends: 254 [2021-03-10 21:44:06,714 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 21:44:06,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 21:44:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 148. [2021-03-10 21:44:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.006802721088435) internal successors, (442), 147 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 442 transitions. [2021-03-10 21:44:06,717 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 442 transitions. Word has length 16 [2021-03-10 21:44:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:06,717 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 442 transitions. [2021-03-10 21:44:06,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 442 transitions. [2021-03-10 21:44:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:06,717 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:06,717 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:06,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2021-03-10 21:44:06,717 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:06,718 INFO L82 PathProgramCache]: Analyzing trace with hash 499376906, now seen corresponding path program 37 times [2021-03-10 21:44:06,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:06,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014347427] [2021-03-10 21:44:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:06,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014347427] [2021-03-10 21:44:06,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731212678] [2021-03-10 21:44:06,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:06,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:06,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:06,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:06,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:44:06,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622765853] [2021-03-10 21:44:06,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:44:06,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:06,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:44:06,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:06,854 INFO L87 Difference]: Start difference. First operand 148 states and 442 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:06,971 INFO L93 Difference]: Finished difference Result 297 states and 849 transitions. [2021-03-10 21:44:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:06,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:06,972 INFO L225 Difference]: With dead ends: 297 [2021-03-10 21:44:06,972 INFO L226 Difference]: Without dead ends: 297 [2021-03-10 21:44:06,972 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-03-10 21:44:06,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 156. [2021-03-10 21:44:06,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 3.109677419354839) internal successors, (482), 155 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 482 transitions. [2021-03-10 21:44:06,974 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 482 transitions. Word has length 16 [2021-03-10 21:44:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:06,974 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 482 transitions. [2021-03-10 21:44:06,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:06,974 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 482 transitions. [2021-03-10 21:44:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:06,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:06,975 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:07,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-03-10 21:44:07,175 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:07,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:07,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1694413080, now seen corresponding path program 36 times [2021-03-10 21:44:07,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:07,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22658885] [2021-03-10 21:44:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:07,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22658885] [2021-03-10 21:44:07,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089539356] [2021-03-10 21:44:07,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:07,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:44:07,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:07,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:07,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:07,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:07,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:07,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156502599] [2021-03-10 21:44:07,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:07,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:07,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:07,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:07,299 INFO L87 Difference]: Start difference. First operand 156 states and 482 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:07,397 INFO L93 Difference]: Finished difference Result 308 states and 850 transitions. [2021-03-10 21:44:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:07,397 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:07,397 INFO L225 Difference]: With dead ends: 308 [2021-03-10 21:44:07,398 INFO L226 Difference]: Without dead ends: 304 [2021-03-10 21:44:07,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-03-10 21:44:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 164. [2021-03-10 21:44:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 3.1104294478527605) internal successors, (507), 163 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 507 transitions. [2021-03-10 21:44:07,400 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 507 transitions. Word has length 16 [2021-03-10 21:44:07,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:07,400 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 507 transitions. [2021-03-10 21:44:07,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:07,400 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 507 transitions. [2021-03-10 21:44:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:07,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:07,401 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:07,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:07,601 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:07,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1171599110, now seen corresponding path program 38 times [2021-03-10 21:44:07,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:07,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94947239] [2021-03-10 21:44:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:07,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94947239] [2021-03-10 21:44:07,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190168970] [2021-03-10 21:44:07,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:07,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:07,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:07,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:07,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:07,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:07,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:44:07,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438637966] [2021-03-10 21:44:07,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:44:07,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:07,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:44:07,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:07,725 INFO L87 Difference]: Start difference. First operand 164 states and 507 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:07,806 INFO L93 Difference]: Finished difference Result 297 states and 840 transitions. [2021-03-10 21:44:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:07,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:07,807 INFO L225 Difference]: With dead ends: 297 [2021-03-10 21:44:07,807 INFO L226 Difference]: Without dead ends: 294 [2021-03-10 21:44:07,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-03-10 21:44:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 161. [2021-03-10 21:44:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.05625) internal successors, (489), 160 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 489 transitions. [2021-03-10 21:44:07,811 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 489 transitions. Word has length 16 [2021-03-10 21:44:07,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:07,811 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 489 transitions. [2021-03-10 21:44:07,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 489 transitions. [2021-03-10 21:44:07,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:07,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:07,812 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:08,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-03-10 21:44:08,035 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:08,035 INFO L82 PathProgramCache]: Analyzing trace with hash -245575666, now seen corresponding path program 37 times [2021-03-10 21:44:08,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:08,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698860924] [2021-03-10 21:44:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:08,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698860924] [2021-03-10 21:44:08,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183405702] [2021-03-10 21:44:08,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:08,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:08,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:08,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:08,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:08,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712690830] [2021-03-10 21:44:08,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:08,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:08,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:08,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:08,175 INFO L87 Difference]: Start difference. First operand 161 states and 489 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:08,274 INFO L93 Difference]: Finished difference Result 317 states and 873 transitions. [2021-03-10 21:44:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:08,275 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:08,276 INFO L225 Difference]: With dead ends: 317 [2021-03-10 21:44:08,276 INFO L226 Difference]: Without dead ends: 317 [2021-03-10 21:44:08,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:08,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-03-10 21:44:08,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 158. [2021-03-10 21:44:08,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.0573248407643314) internal successors, (480), 157 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 480 transitions. [2021-03-10 21:44:08,279 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 480 transitions. Word has length 16 [2021-03-10 21:44:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:08,279 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 480 transitions. [2021-03-10 21:44:08,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 480 transitions. [2021-03-10 21:44:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:08,280 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:08,280 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:08,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-03-10 21:44:08,501 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:08,501 INFO L82 PathProgramCache]: Analyzing trace with hash 841960418, now seen corresponding path program 39 times [2021-03-10 21:44:08,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:08,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707824433] [2021-03-10 21:44:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:08,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707824433] [2021-03-10 21:44:08,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656749297] [2021-03-10 21:44:08,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:08,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:08,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:08,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:08,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:08,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:08,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:44:08,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196281128] [2021-03-10 21:44:08,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:44:08,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:08,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:44:08,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:08,636 INFO L87 Difference]: Start difference. First operand 158 states and 480 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:08,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:08,740 INFO L93 Difference]: Finished difference Result 295 states and 832 transitions. [2021-03-10 21:44:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:08,740 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:08,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:08,741 INFO L225 Difference]: With dead ends: 295 [2021-03-10 21:44:08,741 INFO L226 Difference]: Without dead ends: 295 [2021-03-10 21:44:08,741 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-03-10 21:44:08,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 160. [2021-03-10 21:44:08,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.069182389937107) internal successors, (488), 159 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 488 transitions. [2021-03-10 21:44:08,744 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 488 transitions. Word has length 16 [2021-03-10 21:44:08,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:08,744 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 488 transitions. [2021-03-10 21:44:08,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 488 transitions. [2021-03-10 21:44:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:08,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:08,744 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:08,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-03-10 21:44:08,951 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:08,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:08,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1481293524, now seen corresponding path program 40 times [2021-03-10 21:44:08,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:08,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100352586] [2021-03-10 21:44:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:08,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100352586] [2021-03-10 21:44:08,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429840999] [2021-03-10 21:44:08,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:09,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:09,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:09,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:09,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:44:09,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203263533] [2021-03-10 21:44:09,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:44:09,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:09,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:44:09,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:09,106 INFO L87 Difference]: Start difference. First operand 160 states and 488 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:09,201 INFO L93 Difference]: Finished difference Result 273 states and 778 transitions. [2021-03-10 21:44:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:09,201 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:09,201 INFO L225 Difference]: With dead ends: 273 [2021-03-10 21:44:09,201 INFO L226 Difference]: Without dead ends: 271 [2021-03-10 21:44:09,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-03-10 21:44:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 158. [2021-03-10 21:44:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.0573248407643314) internal successors, (480), 157 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 480 transitions. [2021-03-10 21:44:09,204 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 480 transitions. Word has length 16 [2021-03-10 21:44:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:09,204 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 480 transitions. [2021-03-10 21:44:09,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,205 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 480 transitions. [2021-03-10 21:44:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:09,205 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:09,206 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:09,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:09,415 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash 952979406, now seen corresponding path program 38 times [2021-03-10 21:44:09,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:09,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279053659] [2021-03-10 21:44:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:09,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279053659] [2021-03-10 21:44:09,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:09,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:09,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774493963] [2021-03-10 21:44:09,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:09,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:09,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:09,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:09,457 INFO L87 Difference]: Start difference. First operand 158 states and 480 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:09,536 INFO L93 Difference]: Finished difference Result 296 states and 795 transitions. [2021-03-10 21:44:09,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:09,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:09,537 INFO L225 Difference]: With dead ends: 296 [2021-03-10 21:44:09,537 INFO L226 Difference]: Without dead ends: 292 [2021-03-10 21:44:09,538 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:09,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-03-10 21:44:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 160. [2021-03-10 21:44:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0440251572327046) internal successors, (484), 159 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 484 transitions. [2021-03-10 21:44:09,541 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 484 transitions. Word has length 16 [2021-03-10 21:44:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:09,541 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 484 transitions. [2021-03-10 21:44:09,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 484 transitions. [2021-03-10 21:44:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:09,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:09,541 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:09,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316 [2021-03-10 21:44:09,542 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:09,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:09,542 INFO L82 PathProgramCache]: Analyzing trace with hash 879606926, now seen corresponding path program 39 times [2021-03-10 21:44:09,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:09,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330197641] [2021-03-10 21:44:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:09,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330197641] [2021-03-10 21:44:09,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:09,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:09,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762001527] [2021-03-10 21:44:09,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:09,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:09,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:09,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:09,578 INFO L87 Difference]: Start difference. First operand 160 states and 484 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:09,661 INFO L93 Difference]: Finished difference Result 279 states and 769 transitions. [2021-03-10 21:44:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:09,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:09,662 INFO L225 Difference]: With dead ends: 279 [2021-03-10 21:44:09,662 INFO L226 Difference]: Without dead ends: 276 [2021-03-10 21:44:09,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:09,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-03-10 21:44:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 159. [2021-03-10 21:44:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.0443037974683542) internal successors, (481), 158 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 481 transitions. [2021-03-10 21:44:09,664 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 481 transitions. Word has length 16 [2021-03-10 21:44:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:09,664 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 481 transitions. [2021-03-10 21:44:09,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 481 transitions. [2021-03-10 21:44:09,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:09,665 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:09,665 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:09,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317 [2021-03-10 21:44:09,665 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash 213900140, now seen corresponding path program 41 times [2021-03-10 21:44:09,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:09,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68266165] [2021-03-10 21:44:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:09,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68266165] [2021-03-10 21:44:09,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:09,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:09,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603165437] [2021-03-10 21:44:09,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:09,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:09,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:09,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:09,696 INFO L87 Difference]: Start difference. First operand 159 states and 481 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:09,783 INFO L93 Difference]: Finished difference Result 259 states and 730 transitions. [2021-03-10 21:44:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:09,784 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:09,784 INFO L225 Difference]: With dead ends: 259 [2021-03-10 21:44:09,784 INFO L226 Difference]: Without dead ends: 256 [2021-03-10 21:44:09,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-03-10 21:44:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 161. [2021-03-10 21:44:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.03125) internal successors, (485), 160 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 485 transitions. [2021-03-10 21:44:09,787 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 485 transitions. Word has length 16 [2021-03-10 21:44:09,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:09,787 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 485 transitions. [2021-03-10 21:44:09,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,787 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 485 transitions. [2021-03-10 21:44:09,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:09,787 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:09,787 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:09,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318 [2021-03-10 21:44:09,787 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:09,787 INFO L82 PathProgramCache]: Analyzing trace with hash -883427436, now seen corresponding path program 42 times [2021-03-10 21:44:09,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:09,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401737421] [2021-03-10 21:44:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:09,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401737421] [2021-03-10 21:44:09,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:09,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:09,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854644343] [2021-03-10 21:44:09,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:09,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:09,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:09,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:09,818 INFO L87 Difference]: Start difference. First operand 161 states and 485 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:09,908 INFO L93 Difference]: Finished difference Result 245 states and 709 transitions. [2021-03-10 21:44:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:09,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:09,909 INFO L225 Difference]: With dead ends: 245 [2021-03-10 21:44:09,909 INFO L226 Difference]: Without dead ends: 242 [2021-03-10 21:44:09,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:09,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-03-10 21:44:09,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 160. [2021-03-10 21:44:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0314465408805034) internal successors, (482), 159 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 482 transitions. [2021-03-10 21:44:09,911 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 482 transitions. Word has length 16 [2021-03-10 21:44:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:09,911 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 482 transitions. [2021-03-10 21:44:09,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:09,912 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 482 transitions. [2021-03-10 21:44:09,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:09,912 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:09,912 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:09,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319 [2021-03-10 21:44:09,912 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:09,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:09,912 INFO L82 PathProgramCache]: Analyzing trace with hash 55906398, now seen corresponding path program 40 times [2021-03-10 21:44:09,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:09,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701603787] [2021-03-10 21:44:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:09,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701603787] [2021-03-10 21:44:09,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600547892] [2021-03-10 21:44:09,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:09,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:09,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:09,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:09,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:10,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:10,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:10,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752317962] [2021-03-10 21:44:10,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:10,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:10,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:10,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:10,045 INFO L87 Difference]: Start difference. First operand 160 states and 482 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:10,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:10,144 INFO L93 Difference]: Finished difference Result 285 states and 786 transitions. [2021-03-10 21:44:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:10,144 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:10,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:10,145 INFO L225 Difference]: With dead ends: 285 [2021-03-10 21:44:10,145 INFO L226 Difference]: Without dead ends: 285 [2021-03-10 21:44:10,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:10,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-03-10 21:44:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 158. [2021-03-10 21:44:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.9936305732484074) internal successors, (470), 157 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 470 transitions. [2021-03-10 21:44:10,147 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 470 transitions. Word has length 16 [2021-03-10 21:44:10,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:10,147 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 470 transitions. [2021-03-10 21:44:10,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 470 transitions. [2021-03-10 21:44:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:10,147 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:10,147 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:10,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-03-10 21:44:10,348 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:10,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:10,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1417462504, now seen corresponding path program 41 times [2021-03-10 21:44:10,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:10,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835392847] [2021-03-10 21:44:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:10,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835392847] [2021-03-10 21:44:10,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:10,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:10,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249600242] [2021-03-10 21:44:10,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:10,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:10,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:10,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:10,381 INFO L87 Difference]: Start difference. First operand 158 states and 470 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:10,468 INFO L93 Difference]: Finished difference Result 259 states and 722 transitions. [2021-03-10 21:44:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:10,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:10,469 INFO L225 Difference]: With dead ends: 259 [2021-03-10 21:44:10,469 INFO L226 Difference]: Without dead ends: 257 [2021-03-10 21:44:10,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:10,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-03-10 21:44:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 148. [2021-03-10 21:44:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.0136054421768708) internal successors, (443), 147 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 443 transitions. [2021-03-10 21:44:10,471 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 443 transitions. Word has length 16 [2021-03-10 21:44:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:10,472 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 443 transitions. [2021-03-10 21:44:10,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 443 transitions. [2021-03-10 21:44:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:10,472 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:10,472 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:10,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321 [2021-03-10 21:44:10,472 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:10,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:10,472 INFO L82 PathProgramCache]: Analyzing trace with hash 105703180, now seen corresponding path program 43 times [2021-03-10 21:44:10,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:10,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414945507] [2021-03-10 21:44:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:10,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414945507] [2021-03-10 21:44:10,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72732650] [2021-03-10 21:44:10,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:10,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:10,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:10,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:10,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:44:10,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313396014] [2021-03-10 21:44:10,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:44:10,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:10,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:44:10,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:44:10,566 INFO L87 Difference]: Start difference. First operand 148 states and 443 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:10,665 INFO L93 Difference]: Finished difference Result 245 states and 701 transitions. [2021-03-10 21:44:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:10,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:10,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:10,665 INFO L225 Difference]: With dead ends: 245 [2021-03-10 21:44:10,665 INFO L226 Difference]: Without dead ends: 245 [2021-03-10 21:44:10,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:10,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-03-10 21:44:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 137. [2021-03-10 21:44:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.0220588235294117) internal successors, (411), 136 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 411 transitions. [2021-03-10 21:44:10,668 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 411 transitions. Word has length 16 [2021-03-10 21:44:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:10,668 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 411 transitions. [2021-03-10 21:44:10,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 411 transitions. [2021-03-10 21:44:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:10,668 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:10,668 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:10,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-03-10 21:44:10,875 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:10,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1387314302, now seen corresponding path program 44 times [2021-03-10 21:44:10,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:10,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181099147] [2021-03-10 21:44:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:10,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181099147] [2021-03-10 21:44:10,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456979446] [2021-03-10 21:44:10,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:10,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:10,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:10,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:10,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:11,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:11,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:44:11,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18043074] [2021-03-10 21:44:11,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:44:11,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:11,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:44:11,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:44:11,011 INFO L87 Difference]: Start difference. First operand 137 states and 411 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:11,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:11,135 INFO L93 Difference]: Finished difference Result 240 states and 665 transitions. [2021-03-10 21:44:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:11,135 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:11,135 INFO L225 Difference]: With dead ends: 240 [2021-03-10 21:44:11,135 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:44:11,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:44:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 135. [2021-03-10 21:44:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.9776119402985075) internal successors, (399), 134 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 399 transitions. [2021-03-10 21:44:11,138 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 399 transitions. Word has length 16 [2021-03-10 21:44:11,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:11,138 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 399 transitions. [2021-03-10 21:44:11,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 399 transitions. [2021-03-10 21:44:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:11,138 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:11,138 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:11,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-03-10 21:44:11,339 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:11,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:11,339 INFO L82 PathProgramCache]: Analyzing trace with hash -777157054, now seen corresponding path program 45 times [2021-03-10 21:44:11,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:11,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043815188] [2021-03-10 21:44:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:11,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043815188] [2021-03-10 21:44:11,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025492887] [2021-03-10 21:44:11,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:11,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:44:11,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:11,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:11,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:11,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:11,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:44:11,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49125624] [2021-03-10 21:44:11,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:44:11,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:11,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:44:11,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:44:11,451 INFO L87 Difference]: Start difference. First operand 135 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:11,575 INFO L93 Difference]: Finished difference Result 216 states and 610 transitions. [2021-03-10 21:44:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:11,575 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:11,576 INFO L225 Difference]: With dead ends: 216 [2021-03-10 21:44:11,576 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 21:44:11,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 21:44:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 125. [2021-03-10 21:44:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.9919354838709675) internal successors, (371), 124 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 371 transitions. [2021-03-10 21:44:11,578 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 371 transitions. Word has length 16 [2021-03-10 21:44:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:11,578 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 371 transitions. [2021-03-10 21:44:11,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 371 transitions. [2021-03-10 21:44:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:11,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:11,578 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:11,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:11,783 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:11,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:11,783 INFO L82 PathProgramCache]: Analyzing trace with hash 276142176, now seen corresponding path program 46 times [2021-03-10 21:44:11,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:11,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192083909] [2021-03-10 21:44:11,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:11,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192083909] [2021-03-10 21:44:11,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014954247] [2021-03-10 21:44:11,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:11,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:11,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:11,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:11,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:11,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:11,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:44:11,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321526781] [2021-03-10 21:44:11,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:44:11,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:11,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:44:11,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:11,915 INFO L87 Difference]: Start difference. First operand 125 states and 371 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:12,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:12,027 INFO L93 Difference]: Finished difference Result 197 states and 550 transitions. [2021-03-10 21:44:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:12,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:12,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:12,028 INFO L225 Difference]: With dead ends: 197 [2021-03-10 21:44:12,028 INFO L226 Difference]: Without dead ends: 197 [2021-03-10 21:44:12,028 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:12,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-03-10 21:44:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 129. [2021-03-10 21:44:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 3.0234375) internal successors, (387), 128 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 387 transitions. [2021-03-10 21:44:12,030 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 387 transitions. Word has length 16 [2021-03-10 21:44:12,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:12,030 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 387 transitions. [2021-03-10 21:44:12,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:12,030 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 387 transitions. [2021-03-10 21:44:12,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:12,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:12,030 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:12,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-03-10 21:44:12,231 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:12,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:12,231 INFO L82 PathProgramCache]: Analyzing trace with hash 886299424, now seen corresponding path program 47 times [2021-03-10 21:44:12,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:12,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910893588] [2021-03-10 21:44:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:12,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910893588] [2021-03-10 21:44:12,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694032419] [2021-03-10 21:44:12,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:12,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:12,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:12,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:12,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:12,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:12,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:44:12,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841953626] [2021-03-10 21:44:12,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:44:12,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:12,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:44:12,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:12,349 INFO L87 Difference]: Start difference. First operand 129 states and 387 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:12,447 INFO L93 Difference]: Finished difference Result 199 states and 552 transitions. [2021-03-10 21:44:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:12,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:12,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:12,448 INFO L225 Difference]: With dead ends: 199 [2021-03-10 21:44:12,448 INFO L226 Difference]: Without dead ends: 197 [2021-03-10 21:44:12,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:12,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-03-10 21:44:12,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2021-03-10 21:44:12,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 3.007936507936508) internal successors, (379), 126 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:12,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 379 transitions. [2021-03-10 21:44:12,450 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 379 transitions. Word has length 16 [2021-03-10 21:44:12,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:12,450 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 379 transitions. [2021-03-10 21:44:12,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:12,450 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 379 transitions. [2021-03-10 21:44:12,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:12,450 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:12,451 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:12,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:12,651 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:12,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:12,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1804249614, now seen corresponding path program 48 times [2021-03-10 21:44:12,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:12,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314156387] [2021-03-10 21:44:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:12,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314156387] [2021-03-10 21:44:12,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051812507] [2021-03-10 21:44:12,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:12,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:44:12,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:12,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:12,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:12,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:12,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:44:12,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800579491] [2021-03-10 21:44:12,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:44:12,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:12,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:44:12,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:44:12,756 INFO L87 Difference]: Start difference. First operand 127 states and 379 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:12,854 INFO L93 Difference]: Finished difference Result 178 states and 504 transitions. [2021-03-10 21:44:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:12,855 INFO L225 Difference]: With dead ends: 178 [2021-03-10 21:44:12,855 INFO L226 Difference]: Without dead ends: 174 [2021-03-10 21:44:12,855 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-03-10 21:44:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2021-03-10 21:44:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 3.016260162601626) internal successors, (371), 123 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 371 transitions. [2021-03-10 21:44:12,857 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 371 transitions. Word has length 16 [2021-03-10 21:44:12,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:12,857 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 371 transitions. [2021-03-10 21:44:12,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 371 transitions. [2021-03-10 21:44:12,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:12,857 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:12,857 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:13,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-03-10 21:44:13,057 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:13,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1122947330, now seen corresponding path program 42 times [2021-03-10 21:44:13,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:13,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690824173] [2021-03-10 21:44:13,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:13,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690824173] [2021-03-10 21:44:13,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:13,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:13,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899622493] [2021-03-10 21:44:13,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:13,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:13,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:13,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:13,086 INFO L87 Difference]: Start difference. First operand 124 states and 371 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:13,166 INFO L93 Difference]: Finished difference Result 187 states and 507 transitions. [2021-03-10 21:44:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:13,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:13,166 INFO L225 Difference]: With dead ends: 187 [2021-03-10 21:44:13,167 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 21:44:13,167 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 21:44:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 128. [2021-03-10 21:44:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.968503937007874) internal successors, (377), 127 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 377 transitions. [2021-03-10 21:44:13,168 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 377 transitions. Word has length 16 [2021-03-10 21:44:13,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:13,168 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 377 transitions. [2021-03-10 21:44:13,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 377 transitions. [2021-03-10 21:44:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:13,169 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:13,169 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:13,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334 [2021-03-10 21:44:13,169 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:13,169 INFO L82 PathProgramCache]: Analyzing trace with hash -701314238, now seen corresponding path program 43 times [2021-03-10 21:44:13,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:13,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024378939] [2021-03-10 21:44:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:13,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024378939] [2021-03-10 21:44:13,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:13,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:13,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531615594] [2021-03-10 21:44:13,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:13,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:13,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:13,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:13,222 INFO L87 Difference]: Start difference. First operand 128 states and 377 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:13,340 INFO L93 Difference]: Finished difference Result 195 states and 514 transitions. [2021-03-10 21:44:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:13,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:13,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:13,341 INFO L225 Difference]: With dead ends: 195 [2021-03-10 21:44:13,341 INFO L226 Difference]: Without dead ends: 191 [2021-03-10 21:44:13,341 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:13,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-03-10 21:44:13,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 134. [2021-03-10 21:44:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.924812030075188) internal successors, (389), 133 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 389 transitions. [2021-03-10 21:44:13,343 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 389 transitions. Word has length 16 [2021-03-10 21:44:13,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:13,343 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 389 transitions. [2021-03-10 21:44:13,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 389 transitions. [2021-03-10 21:44:13,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:13,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:13,344 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:13,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335 [2021-03-10 21:44:13,344 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:13,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:13,344 INFO L82 PathProgramCache]: Analyzing trace with hash -774686718, now seen corresponding path program 44 times [2021-03-10 21:44:13,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:13,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882844844] [2021-03-10 21:44:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:13,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882844844] [2021-03-10 21:44:13,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:13,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:13,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995433267] [2021-03-10 21:44:13,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:13,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:13,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:13,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:13,375 INFO L87 Difference]: Start difference. First operand 134 states and 389 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:13,480 INFO L93 Difference]: Finished difference Result 180 states and 492 transitions. [2021-03-10 21:44:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:13,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:13,481 INFO L225 Difference]: With dead ends: 180 [2021-03-10 21:44:13,481 INFO L226 Difference]: Without dead ends: 175 [2021-03-10 21:44:13,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:13,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-03-10 21:44:13,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 126. [2021-03-10 21:44:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.984) internal successors, (373), 125 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 373 transitions. [2021-03-10 21:44:13,482 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 373 transitions. Word has length 16 [2021-03-10 21:44:13,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:13,483 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 373 transitions. [2021-03-10 21:44:13,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 373 transitions. [2021-03-10 21:44:13,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:13,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:13,483 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:13,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336 [2021-03-10 21:44:13,483 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:13,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:13,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1714006770, now seen corresponding path program 45 times [2021-03-10 21:44:13,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:13,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21158485] [2021-03-10 21:44:13,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:13,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21158485] [2021-03-10 21:44:13,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:13,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:13,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273447288] [2021-03-10 21:44:13,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:13,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:13,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:13,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:13,516 INFO L87 Difference]: Start difference. First operand 126 states and 373 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:13,619 INFO L93 Difference]: Finished difference Result 178 states and 483 transitions. [2021-03-10 21:44:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:13,620 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:13,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:13,620 INFO L225 Difference]: With dead ends: 178 [2021-03-10 21:44:13,620 INFO L226 Difference]: Without dead ends: 174 [2021-03-10 21:44:13,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:13,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-03-10 21:44:13,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 134. [2021-03-10 21:44:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.9323308270676693) internal successors, (390), 133 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 390 transitions. [2021-03-10 21:44:13,622 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 390 transitions. Word has length 16 [2021-03-10 21:44:13,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:13,622 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 390 transitions. [2021-03-10 21:44:13,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,622 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 390 transitions. [2021-03-10 21:44:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:13,622 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:13,622 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:13,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337 [2021-03-10 21:44:13,622 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:13,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:13,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1787379250, now seen corresponding path program 46 times [2021-03-10 21:44:13,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:13,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256913500] [2021-03-10 21:44:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:13,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256913500] [2021-03-10 21:44:13,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:13,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:13,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769901408] [2021-03-10 21:44:13,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:13,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:13,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:13,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:13,655 INFO L87 Difference]: Start difference. First operand 134 states and 390 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:13,779 INFO L93 Difference]: Finished difference Result 176 states and 480 transitions. [2021-03-10 21:44:13,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:13,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:13,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:13,780 INFO L225 Difference]: With dead ends: 176 [2021-03-10 21:44:13,780 INFO L226 Difference]: Without dead ends: 173 [2021-03-10 21:44:13,780 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-03-10 21:44:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 133. [2021-03-10 21:44:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.9318181818181817) internal successors, (387), 132 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 387 transitions. [2021-03-10 21:44:13,782 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 387 transitions. Word has length 16 [2021-03-10 21:44:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:13,782 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 387 transitions. [2021-03-10 21:44:13,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 387 transitions. [2021-03-10 21:44:13,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:13,782 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:13,782 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:13,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338 [2021-03-10 21:44:13,782 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:13,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:13,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1784753474, now seen corresponding path program 47 times [2021-03-10 21:44:13,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:13,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129766099] [2021-03-10 21:44:13,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:13,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129766099] [2021-03-10 21:44:13,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:13,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:13,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967852341] [2021-03-10 21:44:13,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:13,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:13,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:13,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:13,822 INFO L87 Difference]: Start difference. First operand 133 states and 387 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:13,906 INFO L93 Difference]: Finished difference Result 162 states and 458 transitions. [2021-03-10 21:44:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:13,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:13,906 INFO L225 Difference]: With dead ends: 162 [2021-03-10 21:44:13,906 INFO L226 Difference]: Without dead ends: 155 [2021-03-10 21:44:13,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-03-10 21:44:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 124. [2021-03-10 21:44:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 3.0) internal successors, (369), 123 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 369 transitions. [2021-03-10 21:44:13,908 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 369 transitions. Word has length 16 [2021-03-10 21:44:13,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:13,908 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 369 transitions. [2021-03-10 21:44:13,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:13,908 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 369 transitions. [2021-03-10 21:44:13,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:13,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:13,908 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:13,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339 [2021-03-10 21:44:13,908 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:13,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:13,909 INFO L82 PathProgramCache]: Analyzing trace with hash -829320514, now seen corresponding path program 49 times [2021-03-10 21:44:13,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:13,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403862323] [2021-03-10 21:44:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:13,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403862323] [2021-03-10 21:44:13,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156965835] [2021-03-10 21:44:13,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:14,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:14,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:14,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:14,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-10 21:44:14,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881309457] [2021-03-10 21:44:14,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:14,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:14,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:14,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:14,095 INFO L87 Difference]: Start difference. First operand 124 states and 369 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:14,338 INFO L93 Difference]: Finished difference Result 206 states and 593 transitions. [2021-03-10 21:44:14,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:14,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:14,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:14,344 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:44:14,344 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 21:44:14,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 204.5ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:14,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 21:44:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 134. [2021-03-10 21:44:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 3.1503759398496243) internal successors, (419), 133 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 419 transitions. [2021-03-10 21:44:14,346 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 419 transitions. Word has length 16 [2021-03-10 21:44:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:14,347 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 419 transitions. [2021-03-10 21:44:14,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 419 transitions. [2021-03-10 21:44:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:14,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:14,347 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:14,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:14,555 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:14,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:14,555 INFO L82 PathProgramCache]: Analyzing trace with hash 365715660, now seen corresponding path program 48 times [2021-03-10 21:44:14,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:14,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975672090] [2021-03-10 21:44:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:14,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975672090] [2021-03-10 21:44:14,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028015576] [2021-03-10 21:44:14,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:14,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:44:14,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:14,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:14,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:14,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:14,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:14,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883746214] [2021-03-10 21:44:14,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:14,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:14,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:14,688 INFO L87 Difference]: Start difference. First operand 134 states and 419 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:14,770 INFO L93 Difference]: Finished difference Result 228 states and 642 transitions. [2021-03-10 21:44:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:14,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:14,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:14,771 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:44:14,771 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 21:44:14,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:14,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 21:44:14,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 143. [2021-03-10 21:44:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.1619718309859155) internal successors, (449), 142 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 449 transitions. [2021-03-10 21:44:14,773 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 449 transitions. Word has length 16 [2021-03-10 21:44:14,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:14,773 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 449 transitions. [2021-03-10 21:44:14,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 449 transitions. [2021-03-10 21:44:14,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:14,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:14,773 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:14,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2021-03-10 21:44:14,995 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:14,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:14,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1794670766, now seen corresponding path program 50 times [2021-03-10 21:44:14,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:14,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186247577] [2021-03-10 21:44:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:15,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186247577] [2021-03-10 21:44:15,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231049242] [2021-03-10 21:44:15,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:15,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:15,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:15,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:15,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:15,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:15,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-10 21:44:15,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755820081] [2021-03-10 21:44:15,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:15,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:15,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:15,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:15,139 INFO L87 Difference]: Start difference. First operand 143 states and 449 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:15,290 INFO L93 Difference]: Finished difference Result 204 states and 583 transitions. [2021-03-10 21:44:15,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:15,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:15,291 INFO L225 Difference]: With dead ends: 204 [2021-03-10 21:44:15,291 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 21:44:15,291 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 21:44:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 146. [2021-03-10 21:44:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 3.117241379310345) internal successors, (452), 145 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 452 transitions. [2021-03-10 21:44:15,293 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 452 transitions. Word has length 16 [2021-03-10 21:44:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:15,293 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 452 transitions. [2021-03-10 21:44:15,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 452 transitions. [2021-03-10 21:44:15,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:15,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:15,294 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:15,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-03-10 21:44:15,494 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:15,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:15,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1574273086, now seen corresponding path program 49 times [2021-03-10 21:44:15,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:15,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363511488] [2021-03-10 21:44:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:15,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363511488] [2021-03-10 21:44:15,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174781520] [2021-03-10 21:44:15,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:15,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:15,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:15,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:15,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:15,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571615491] [2021-03-10 21:44:15,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:15,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:15,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:15,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:15,620 INFO L87 Difference]: Start difference. First operand 146 states and 452 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:15,712 INFO L93 Difference]: Finished difference Result 237 states and 668 transitions. [2021-03-10 21:44:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:15,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:15,713 INFO L225 Difference]: With dead ends: 237 [2021-03-10 21:44:15,713 INFO L226 Difference]: Without dead ends: 237 [2021-03-10 21:44:15,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:15,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-03-10 21:44:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 143. [2021-03-10 21:44:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.119718309859155) internal successors, (443), 142 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 443 transitions. [2021-03-10 21:44:15,715 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 443 transitions. Word has length 16 [2021-03-10 21:44:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:15,715 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 443 transitions. [2021-03-10 21:44:15,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:15,715 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 443 transitions. [2021-03-10 21:44:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:15,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:15,716 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:15,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-03-10 21:44:15,916 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:15,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:15,916 INFO L82 PathProgramCache]: Analyzing trace with hash -486737002, now seen corresponding path program 51 times [2021-03-10 21:44:15,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:15,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705835511] [2021-03-10 21:44:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:15,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705835511] [2021-03-10 21:44:15,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638809296] [2021-03-10 21:44:15,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:15,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:15,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:15,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:15,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:16,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:16,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:16,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052178387] [2021-03-10 21:44:16,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:16,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:16,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:16,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:16,047 INFO L87 Difference]: Start difference. First operand 143 states and 443 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:16,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:16,161 INFO L93 Difference]: Finished difference Result 241 states and 680 transitions. [2021-03-10 21:44:16,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:16,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:16,162 INFO L225 Difference]: With dead ends: 241 [2021-03-10 21:44:16,162 INFO L226 Difference]: Without dead ends: 241 [2021-03-10 21:44:16,162 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-03-10 21:44:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 145. [2021-03-10 21:44:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.1319444444444446) internal successors, (451), 144 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 451 transitions. [2021-03-10 21:44:16,164 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 451 transitions. Word has length 16 [2021-03-10 21:44:16,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:16,164 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 451 transitions. [2021-03-10 21:44:16,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:16,164 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 451 transitions. [2021-03-10 21:44:16,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:16,164 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:16,164 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:16,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:16,365 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:16,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1484976352, now seen corresponding path program 52 times [2021-03-10 21:44:16,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:16,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315910589] [2021-03-10 21:44:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:16,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315910589] [2021-03-10 21:44:16,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37265326] [2021-03-10 21:44:16,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:16,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:16,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:16,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:16,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:16,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:16,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:16,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898988855] [2021-03-10 21:44:16,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:16,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:16,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:16,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:16,492 INFO L87 Difference]: Start difference. First operand 145 states and 451 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:16,594 INFO L93 Difference]: Finished difference Result 219 states and 626 transitions. [2021-03-10 21:44:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:16,594 INFO L225 Difference]: With dead ends: 219 [2021-03-10 21:44:16,594 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:44:16,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:44:16,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 143. [2021-03-10 21:44:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.119718309859155) internal successors, (443), 142 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 443 transitions. [2021-03-10 21:44:16,597 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 443 transitions. Word has length 16 [2021-03-10 21:44:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:16,597 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 443 transitions. [2021-03-10 21:44:16,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 443 transitions. [2021-03-10 21:44:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:16,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:16,598 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:16,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-03-10 21:44:16,811 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:16,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:16,811 INFO L82 PathProgramCache]: Analyzing trace with hash -375718014, now seen corresponding path program 50 times [2021-03-10 21:44:16,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:16,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961044206] [2021-03-10 21:44:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:16,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961044206] [2021-03-10 21:44:16,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:16,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:16,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505636222] [2021-03-10 21:44:16,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:16,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:16,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:16,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:16,844 INFO L87 Difference]: Start difference. First operand 143 states and 443 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:16,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:16,926 INFO L93 Difference]: Finished difference Result 252 states and 683 transitions. [2021-03-10 21:44:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:16,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:16,927 INFO L225 Difference]: With dead ends: 252 [2021-03-10 21:44:16,927 INFO L226 Difference]: Without dead ends: 248 [2021-03-10 21:44:16,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-03-10 21:44:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 145. [2021-03-10 21:44:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.1041666666666665) internal successors, (447), 144 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 447 transitions. [2021-03-10 21:44:16,929 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 447 transitions. Word has length 16 [2021-03-10 21:44:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:16,929 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 447 transitions. [2021-03-10 21:44:16,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 447 transitions. [2021-03-10 21:44:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:16,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:16,930 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:16,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352 [2021-03-10 21:44:16,930 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:16,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:16,930 INFO L82 PathProgramCache]: Analyzing trace with hash -449090494, now seen corresponding path program 51 times [2021-03-10 21:44:16,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:16,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285312241] [2021-03-10 21:44:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:16,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285312241] [2021-03-10 21:44:16,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:16,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:16,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813375736] [2021-03-10 21:44:16,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:16,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:16,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:16,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:16,963 INFO L87 Difference]: Start difference. First operand 145 states and 447 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:17,041 INFO L93 Difference]: Finished difference Result 235 states and 657 transitions. [2021-03-10 21:44:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:17,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:17,042 INFO L225 Difference]: With dead ends: 235 [2021-03-10 21:44:17,042 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:44:17,042 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:17,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:44:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 144. [2021-03-10 21:44:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 3.104895104895105) internal successors, (444), 143 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 444 transitions. [2021-03-10 21:44:17,044 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 444 transitions. Word has length 16 [2021-03-10 21:44:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:17,045 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 444 transitions. [2021-03-10 21:44:17,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 444 transitions. [2021-03-10 21:44:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:17,045 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:17,045 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:17,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353 [2021-03-10 21:44:17,045 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:17,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1114797280, now seen corresponding path program 53 times [2021-03-10 21:44:17,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:17,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698954270] [2021-03-10 21:44:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:17,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698954270] [2021-03-10 21:44:17,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:17,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:17,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086695907] [2021-03-10 21:44:17,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:17,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:17,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:17,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:17,086 INFO L87 Difference]: Start difference. First operand 144 states and 444 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:17,195 INFO L93 Difference]: Finished difference Result 221 states and 606 transitions. [2021-03-10 21:44:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:17,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:17,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:17,196 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:44:17,196 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 21:44:17,196 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 21:44:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 146. [2021-03-10 21:44:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 3.089655172413793) internal successors, (448), 145 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 448 transitions. [2021-03-10 21:44:17,198 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 448 transitions. Word has length 16 [2021-03-10 21:44:17,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:17,198 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 448 transitions. [2021-03-10 21:44:17,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,198 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 448 transitions. [2021-03-10 21:44:17,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:17,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:17,198 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:17,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354 [2021-03-10 21:44:17,198 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:17,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2082842440, now seen corresponding path program 54 times [2021-03-10 21:44:17,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:17,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770283533] [2021-03-10 21:44:17,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:17,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770283533] [2021-03-10 21:44:17,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:17,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:17,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778022197] [2021-03-10 21:44:17,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:17,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:17,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:17,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:17,241 INFO L87 Difference]: Start difference. First operand 146 states and 448 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:17,350 INFO L93 Difference]: Finished difference Result 207 states and 585 transitions. [2021-03-10 21:44:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:17,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:17,351 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:44:17,351 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:44:17,351 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:17,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:44:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 145. [2021-03-10 21:44:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0902777777777777) internal successors, (445), 144 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 445 transitions. [2021-03-10 21:44:17,353 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 445 transitions. Word has length 16 [2021-03-10 21:44:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:17,353 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 445 transitions. [2021-03-10 21:44:17,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,353 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 445 transitions. [2021-03-10 21:44:17,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:17,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:17,353 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:17,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355 [2021-03-10 21:44:17,354 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:17,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:17,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1272791022, now seen corresponding path program 52 times [2021-03-10 21:44:17,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:17,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265019396] [2021-03-10 21:44:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:17,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265019396] [2021-03-10 21:44:17,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689410831] [2021-03-10 21:44:17,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:17,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:17,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:17,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:17,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:17,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:17,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:17,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933377616] [2021-03-10 21:44:17,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:17,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:17,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:17,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:17,487 INFO L87 Difference]: Start difference. First operand 145 states and 445 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:17,586 INFO L93 Difference]: Finished difference Result 271 states and 747 transitions. [2021-03-10 21:44:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:17,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:17,587 INFO L225 Difference]: With dead ends: 271 [2021-03-10 21:44:17,587 INFO L226 Difference]: Without dead ends: 271 [2021-03-10 21:44:17,587 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-03-10 21:44:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 147. [2021-03-10 21:44:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.1027397260273974) internal successors, (453), 146 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 453 transitions. [2021-03-10 21:44:17,590 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 453 transitions. Word has length 16 [2021-03-10 21:44:17,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:17,590 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 453 transitions. [2021-03-10 21:44:17,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,590 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 453 transitions. [2021-03-10 21:44:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:17,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:17,590 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:17,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-03-10 21:44:17,803 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:17,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:17,803 INFO L82 PathProgramCache]: Analyzing trace with hash 88765084, now seen corresponding path program 53 times [2021-03-10 21:44:17,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:17,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999758281] [2021-03-10 21:44:17,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:17,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999758281] [2021-03-10 21:44:17,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:17,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:17,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081518787] [2021-03-10 21:44:17,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:17,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:17,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:17,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:17,840 INFO L87 Difference]: Start difference. First operand 147 states and 453 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:17,929 INFO L93 Difference]: Finished difference Result 245 states and 683 transitions. [2021-03-10 21:44:17,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:17,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:17,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:17,929 INFO L225 Difference]: With dead ends: 245 [2021-03-10 21:44:17,929 INFO L226 Difference]: Without dead ends: 243 [2021-03-10 21:44:17,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:17,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-03-10 21:44:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 144. [2021-03-10 21:44:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 3.090909090909091) internal successors, (442), 143 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 442 transitions. [2021-03-10 21:44:17,932 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 442 transitions. Word has length 16 [2021-03-10 21:44:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:17,932 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 442 transitions. [2021-03-10 21:44:17,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 442 transitions. [2021-03-10 21:44:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:17,932 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:17,932 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:17,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357 [2021-03-10 21:44:17,932 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:17,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1701446174, now seen corresponding path program 55 times [2021-03-10 21:44:17,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:17,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958571324] [2021-03-10 21:44:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:17,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958571324] [2021-03-10 21:44:17,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354175788] [2021-03-10 21:44:17,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:17,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:17,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:18,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:18,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:18,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87325893] [2021-03-10 21:44:18,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:18,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:18,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:18,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:18,080 INFO L87 Difference]: Start difference. First operand 144 states and 442 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:18,182 INFO L93 Difference]: Finished difference Result 215 states and 605 transitions. [2021-03-10 21:44:18,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:18,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:18,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:18,183 INFO L225 Difference]: With dead ends: 215 [2021-03-10 21:44:18,183 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 21:44:18,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:18,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 21:44:18,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 143. [2021-03-10 21:44:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.0492957746478875) internal successors, (433), 142 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 433 transitions. [2021-03-10 21:44:18,185 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 433 transitions. Word has length 16 [2021-03-10 21:44:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:18,185 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 433 transitions. [2021-03-10 21:44:18,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 433 transitions. [2021-03-10 21:44:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:18,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:18,185 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:18,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:18,386 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:18,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:18,386 INFO L82 PathProgramCache]: Analyzing trace with hash -621807768, now seen corresponding path program 56 times [2021-03-10 21:44:18,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:18,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303937067] [2021-03-10 21:44:18,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:18,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303937067] [2021-03-10 21:44:18,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423212680] [2021-03-10 21:44:18,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:18,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:18,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:18,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:18,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:18,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:18,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:18,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362174896] [2021-03-10 21:44:18,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:18,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:18,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:18,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:18,531 INFO L87 Difference]: Start difference. First operand 143 states and 433 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:18,636 INFO L93 Difference]: Finished difference Result 206 states and 578 transitions. [2021-03-10 21:44:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:18,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:18,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:18,637 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:44:18,637 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:44:18,637 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:18,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:44:18,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 137. [2021-03-10 21:44:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.0661764705882355) internal successors, (417), 136 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 417 transitions. [2021-03-10 21:44:18,638 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 417 transitions. Word has length 16 [2021-03-10 21:44:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:18,639 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 417 transitions. [2021-03-10 21:44:18,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 417 transitions. [2021-03-10 21:44:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:18,639 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:18,639 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:18,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-03-10 21:44:18,839 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:18,840 INFO L82 PathProgramCache]: Analyzing trace with hash -239087380, now seen corresponding path program 57 times [2021-03-10 21:44:18,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:18,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690514538] [2021-03-10 21:44:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:18,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690514538] [2021-03-10 21:44:18,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244702202] [2021-03-10 21:44:18,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:18,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:44:18,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:18,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:18,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:18,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:18,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:44:18,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324569997] [2021-03-10 21:44:18,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:44:18,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:18,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:44:18,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:18,941 INFO L87 Difference]: Start difference. First operand 137 states and 417 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:19,019 INFO L93 Difference]: Finished difference Result 185 states and 529 transitions. [2021-03-10 21:44:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:19,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:19,020 INFO L225 Difference]: With dead ends: 185 [2021-03-10 21:44:19,020 INFO L226 Difference]: Without dead ends: 181 [2021-03-10 21:44:19,020 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-03-10 21:44:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 135. [2021-03-10 21:44:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 3.0522388059701493) internal successors, (409), 134 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 409 transitions. [2021-03-10 21:44:19,021 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 409 transitions. Word has length 16 [2021-03-10 21:44:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:19,021 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 409 transitions. [2021-03-10 21:44:19,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,022 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 409 transitions. [2021-03-10 21:44:19,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:19,022 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:19,022 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:19,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:19,222 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:19,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:19,223 INFO L82 PathProgramCache]: Analyzing trace with hash 212027308, now seen corresponding path program 54 times [2021-03-10 21:44:19,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:19,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101006235] [2021-03-10 21:44:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:19,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101006235] [2021-03-10 21:44:19,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:19,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:19,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174396678] [2021-03-10 21:44:19,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:19,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:19,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:19,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:19,259 INFO L87 Difference]: Start difference. First operand 135 states and 409 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:19,337 INFO L93 Difference]: Finished difference Result 213 states and 580 transitions. [2021-03-10 21:44:19,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:19,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:19,338 INFO L225 Difference]: With dead ends: 213 [2021-03-10 21:44:19,338 INFO L226 Difference]: Without dead ends: 209 [2021-03-10 21:44:19,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-03-10 21:44:19,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 139. [2021-03-10 21:44:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.028985507246377) internal successors, (418), 138 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 418 transitions. [2021-03-10 21:44:19,340 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 418 transitions. Word has length 16 [2021-03-10 21:44:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:19,340 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 418 transitions. [2021-03-10 21:44:19,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,340 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 418 transitions. [2021-03-10 21:44:19,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:19,340 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:19,340 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:19,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365 [2021-03-10 21:44:19,340 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:19,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:19,340 INFO L82 PathProgramCache]: Analyzing trace with hash 138654828, now seen corresponding path program 55 times [2021-03-10 21:44:19,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:19,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537119682] [2021-03-10 21:44:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:19,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537119682] [2021-03-10 21:44:19,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:19,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:19,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852438988] [2021-03-10 21:44:19,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:19,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:19,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:19,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:19,373 INFO L87 Difference]: Start difference. First operand 139 states and 418 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:19,457 INFO L93 Difference]: Finished difference Result 211 states and 577 transitions. [2021-03-10 21:44:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:19,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:19,458 INFO L225 Difference]: With dead ends: 211 [2021-03-10 21:44:19,458 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 21:44:19,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 21:44:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 137. [2021-03-10 21:44:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.036764705882353) internal successors, (413), 136 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 413 transitions. [2021-03-10 21:44:19,460 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 413 transitions. Word has length 16 [2021-03-10 21:44:19,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:19,460 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 413 transitions. [2021-03-10 21:44:19,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,460 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 413 transitions. [2021-03-10 21:44:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:19,460 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:19,460 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:19,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366 [2021-03-10 21:44:19,460 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:19,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:19,461 INFO L82 PathProgramCache]: Analyzing trace with hash 141280604, now seen corresponding path program 56 times [2021-03-10 21:44:19,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:19,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197054320] [2021-03-10 21:44:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:19,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197054320] [2021-03-10 21:44:19,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:19,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:19,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376002808] [2021-03-10 21:44:19,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:19,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:19,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:19,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:19,503 INFO L87 Difference]: Start difference. First operand 137 states and 413 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:19,580 INFO L93 Difference]: Finished difference Result 199 states and 559 transitions. [2021-03-10 21:44:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:19,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:19,581 INFO L225 Difference]: With dead ends: 199 [2021-03-10 21:44:19,581 INFO L226 Difference]: Without dead ends: 194 [2021-03-10 21:44:19,581 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:19,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-03-10 21:44:19,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 136. [2021-03-10 21:44:19,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.037037037037037) internal successors, (410), 135 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 410 transitions. [2021-03-10 21:44:19,582 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 410 transitions. Word has length 16 [2021-03-10 21:44:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:19,583 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 410 transitions. [2021-03-10 21:44:19,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 410 transitions. [2021-03-10 21:44:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:19,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:19,583 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:19,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367 [2021-03-10 21:44:19,583 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash 567039630, now seen corresponding path program 58 times [2021-03-10 21:44:19,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:19,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104741744] [2021-03-10 21:44:19,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:19,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104741744] [2021-03-10 21:44:19,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:19,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:19,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111890031] [2021-03-10 21:44:19,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:19,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:19,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:19,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:19,617 INFO L87 Difference]: Start difference. First operand 136 states and 410 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:19,727 INFO L93 Difference]: Finished difference Result 169 states and 478 transitions. [2021-03-10 21:44:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:19,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:19,728 INFO L225 Difference]: With dead ends: 169 [2021-03-10 21:44:19,728 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 21:44:19,728 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 21:44:19,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 143. [2021-03-10 21:44:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.992957746478873) internal successors, (425), 142 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 425 transitions. [2021-03-10 21:44:19,729 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 425 transitions. Word has length 16 [2021-03-10 21:44:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:19,730 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 425 transitions. [2021-03-10 21:44:19,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 425 transitions. [2021-03-10 21:44:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:19,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:19,730 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:19,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368 [2021-03-10 21:44:19,730 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:19,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:19,730 INFO L82 PathProgramCache]: Analyzing trace with hash -530287946, now seen corresponding path program 59 times [2021-03-10 21:44:19,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:19,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562584762] [2021-03-10 21:44:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:19,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562584762] [2021-03-10 21:44:19,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:19,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:19,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457125905] [2021-03-10 21:44:19,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:19,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:19,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:19,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:19,762 INFO L87 Difference]: Start difference. First operand 143 states and 425 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:19,878 INFO L93 Difference]: Finished difference Result 168 states and 476 transitions. [2021-03-10 21:44:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:19,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:19,879 INFO L225 Difference]: With dead ends: 168 [2021-03-10 21:44:19,879 INFO L226 Difference]: Without dead ends: 165 [2021-03-10 21:44:19,879 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:19,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-03-10 21:44:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2021-03-10 21:44:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.99290780141844) internal successors, (422), 141 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 422 transitions. [2021-03-10 21:44:19,883 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 422 transitions. Word has length 16 [2021-03-10 21:44:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:19,883 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 422 transitions. [2021-03-10 21:44:19,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 422 transitions. [2021-03-10 21:44:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:19,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:19,883 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:19,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369 [2021-03-10 21:44:19,883 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:19,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1618508590, now seen corresponding path program 60 times [2021-03-10 21:44:19,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:19,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974970491] [2021-03-10 21:44:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:19,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974970491] [2021-03-10 21:44:19,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:19,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:19,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114906733] [2021-03-10 21:44:19,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:19,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:19,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:19,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:19,923 INFO L87 Difference]: Start difference. First operand 142 states and 422 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:20,020 INFO L93 Difference]: Finished difference Result 155 states and 456 transitions. [2021-03-10 21:44:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:20,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:20,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:20,021 INFO L225 Difference]: With dead ends: 155 [2021-03-10 21:44:20,021 INFO L226 Difference]: Without dead ends: 150 [2021-03-10 21:44:20,021 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:20,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-03-10 21:44:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2021-03-10 21:44:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.0296296296296297) internal successors, (409), 135 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 409 transitions. [2021-03-10 21:44:20,023 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 409 transitions. Word has length 16 [2021-03-10 21:44:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:20,023 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 409 transitions. [2021-03-10 21:44:20,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 409 transitions. [2021-03-10 21:44:20,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:20,023 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:20,023 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:20,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370 [2021-03-10 21:44:20,023 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:20,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:20,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1191391966, now seen corresponding path program 57 times [2021-03-10 21:44:20,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:20,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208316562] [2021-03-10 21:44:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:20,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208316562] [2021-03-10 21:44:20,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640626812] [2021-03-10 21:44:20,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:44:20,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:20,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:20,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:20,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:20,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:20,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:20,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255105400] [2021-03-10 21:44:20,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:20,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:20,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:20,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:20,188 INFO L87 Difference]: Start difference. First operand 136 states and 409 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:20,318 INFO L93 Difference]: Finished difference Result 201 states and 566 transitions. [2021-03-10 21:44:20,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:20,319 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:20,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:20,319 INFO L225 Difference]: With dead ends: 201 [2021-03-10 21:44:20,319 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 21:44:20,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:20,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 21:44:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 135. [2021-03-10 21:44:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.985074626865672) internal successors, (400), 134 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 400 transitions. [2021-03-10 21:44:20,321 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 400 transitions. Word has length 16 [2021-03-10 21:44:20,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:20,322 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 400 transitions. [2021-03-10 21:44:20,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,322 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 400 transitions. [2021-03-10 21:44:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:20,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:20,322 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:20,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:20,536 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:20,536 INFO L82 PathProgramCache]: Analyzing trace with hash 170164140, now seen corresponding path program 58 times [2021-03-10 21:44:20,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:20,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338717424] [2021-03-10 21:44:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:20,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338717424] [2021-03-10 21:44:20,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:20,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:20,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165410620] [2021-03-10 21:44:20,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:20,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:20,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:20,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:20,575 INFO L87 Difference]: Start difference. First operand 135 states and 400 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:20,684 INFO L93 Difference]: Finished difference Result 197 states and 549 transitions. [2021-03-10 21:44:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:20,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:20,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:20,685 INFO L225 Difference]: With dead ends: 197 [2021-03-10 21:44:20,685 INFO L226 Difference]: Without dead ends: 195 [2021-03-10 21:44:20,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-03-10 21:44:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 133. [2021-03-10 21:44:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.9696969696969697) internal successors, (392), 132 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 392 transitions. [2021-03-10 21:44:20,688 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 392 transitions. Word has length 16 [2021-03-10 21:44:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:20,688 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 392 transitions. [2021-03-10 21:44:20,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 392 transitions. [2021-03-10 21:44:20,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:20,688 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:20,688 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:20,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372 [2021-03-10 21:44:20,689 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:20,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:20,689 INFO L82 PathProgramCache]: Analyzing trace with hash -365065662, now seen corresponding path program 59 times [2021-03-10 21:44:20,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:20,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399672334] [2021-03-10 21:44:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:20,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399672334] [2021-03-10 21:44:20,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:20,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:20,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151619870] [2021-03-10 21:44:20,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:20,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:20,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:20,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:20,721 INFO L87 Difference]: Start difference. First operand 133 states and 392 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:20,793 INFO L93 Difference]: Finished difference Result 174 states and 499 transitions. [2021-03-10 21:44:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:20,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:20,794 INFO L225 Difference]: With dead ends: 174 [2021-03-10 21:44:20,794 INFO L226 Difference]: Without dead ends: 170 [2021-03-10 21:44:20,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-03-10 21:44:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 126. [2021-03-10 21:44:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.008) internal successors, (376), 125 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 376 transitions. [2021-03-10 21:44:20,796 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 376 transitions. Word has length 16 [2021-03-10 21:44:20,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:20,796 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 376 transitions. [2021-03-10 21:44:20,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:20,796 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 376 transitions. [2021-03-10 21:44:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:20,796 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:20,796 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:20,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373 [2021-03-10 21:44:20,796 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:20,796 INFO L82 PathProgramCache]: Analyzing trace with hash -559894012, now seen corresponding path program 61 times [2021-03-10 21:44:20,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:20,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824539388] [2021-03-10 21:44:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:20,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824539388] [2021-03-10 21:44:20,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072813591] [2021-03-10 21:44:20,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:20,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:20,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:20,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:20,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-10 21:44:20,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023583912] [2021-03-10 21:44:20,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:20,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:20,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:20,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:20,948 INFO L87 Difference]: Start difference. First operand 126 states and 376 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:21,108 INFO L93 Difference]: Finished difference Result 200 states and 564 transitions. [2021-03-10 21:44:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:21,108 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:21,109 INFO L225 Difference]: With dead ends: 200 [2021-03-10 21:44:21,109 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 21:44:21,109 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:44:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 21:44:21,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 129. [2021-03-10 21:44:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 3.0546875) internal successors, (391), 128 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 391 transitions. [2021-03-10 21:44:21,111 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 391 transitions. Word has length 16 [2021-03-10 21:44:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:21,111 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 391 transitions. [2021-03-10 21:44:21,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 391 transitions. [2021-03-10 21:44:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:21,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:21,111 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:21,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:21,312 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:21,312 INFO L82 PathProgramCache]: Analyzing trace with hash 635142162, now seen corresponding path program 60 times [2021-03-10 21:44:21,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:21,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701439148] [2021-03-10 21:44:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:21,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701439148] [2021-03-10 21:44:21,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260314117] [2021-03-10 21:44:21,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:21,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:44:21,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:21,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:21,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:21,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:21,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-10 21:44:21,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147877813] [2021-03-10 21:44:21,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:21,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:21,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:21,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:21,449 INFO L87 Difference]: Start difference. First operand 129 states and 391 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:21,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:21,604 INFO L93 Difference]: Finished difference Result 199 states and 565 transitions. [2021-03-10 21:44:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:21,604 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:21,605 INFO L225 Difference]: With dead ends: 199 [2021-03-10 21:44:21,605 INFO L226 Difference]: Without dead ends: 195 [2021-03-10 21:44:21,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:44:21,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-03-10 21:44:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 136. [2021-03-10 21:44:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.0444444444444443) internal successors, (411), 135 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 411 transitions. [2021-03-10 21:44:21,607 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 411 transitions. Word has length 16 [2021-03-10 21:44:21,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:21,607 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 411 transitions. [2021-03-10 21:44:21,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:21,607 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 411 transitions. [2021-03-10 21:44:21,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:21,607 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:21,607 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:21,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:21,822 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:21,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:21,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2064097268, now seen corresponding path program 62 times [2021-03-10 21:44:21,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:21,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273347485] [2021-03-10 21:44:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:21,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273347485] [2021-03-10 21:44:21,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047440079] [2021-03-10 21:44:21,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:21,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:21,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:21,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:21,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:21,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:21,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-10 21:44:21,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635793364] [2021-03-10 21:44:21,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:21,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:21,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:21,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:21,968 INFO L87 Difference]: Start difference. First operand 136 states and 411 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:22,109 INFO L93 Difference]: Finished difference Result 206 states and 579 transitions. [2021-03-10 21:44:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:22,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:22,110 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:44:22,110 INFO L226 Difference]: Without dead ends: 203 [2021-03-10 21:44:22,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:44:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-03-10 21:44:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 136. [2021-03-10 21:44:22,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.022222222222222) internal successors, (408), 135 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:22,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 408 transitions. [2021-03-10 21:44:22,112 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 408 transitions. Word has length 16 [2021-03-10 21:44:22,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:22,112 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 408 transitions. [2021-03-10 21:44:22,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:22,112 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 408 transitions. [2021-03-10 21:44:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:22,112 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:22,112 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:22,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-03-10 21:44:22,313 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:22,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:22,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1304846584, now seen corresponding path program 61 times [2021-03-10 21:44:22,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:22,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044738544] [2021-03-10 21:44:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:22,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044738544] [2021-03-10 21:44:22,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314888774] [2021-03-10 21:44:22,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:22,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:22,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:22,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:22,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-10 21:44:22,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109093173] [2021-03-10 21:44:22,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:22,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:22,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:22,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:22,461 INFO L87 Difference]: Start difference. First operand 136 states and 408 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:22,604 INFO L93 Difference]: Finished difference Result 201 states and 573 transitions. [2021-03-10 21:44:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:22,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:22,605 INFO L225 Difference]: With dead ends: 201 [2021-03-10 21:44:22,605 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 21:44:22,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:44:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 21:44:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 133. [2021-03-10 21:44:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.022727272727273) internal successors, (399), 132 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 399 transitions. [2021-03-10 21:44:22,607 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 399 transitions. Word has length 16 [2021-03-10 21:44:22,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:22,607 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 399 transitions. [2021-03-10 21:44:22,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:22,607 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 399 transitions. [2021-03-10 21:44:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:22,607 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:22,607 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:22,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:22,825 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:22,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:22,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1190356588, now seen corresponding path program 63 times [2021-03-10 21:44:22,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:22,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685127148] [2021-03-10 21:44:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:22,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685127148] [2021-03-10 21:44:22,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938522585] [2021-03-10 21:44:22,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:22,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:44:22,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:22,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:22,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:22,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:22,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-10 21:44:22,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547172123] [2021-03-10 21:44:22,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:22,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:22,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:22,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:22,959 INFO L87 Difference]: Start difference. First operand 133 states and 399 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:23,077 INFO L93 Difference]: Finished difference Result 199 states and 553 transitions. [2021-03-10 21:44:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:23,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:23,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:23,078 INFO L225 Difference]: With dead ends: 199 [2021-03-10 21:44:23,078 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 21:44:23,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:44:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 21:44:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 133. [2021-03-10 21:44:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.0) internal successors, (396), 132 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 396 transitions. [2021-03-10 21:44:23,080 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 396 transitions. Word has length 16 [2021-03-10 21:44:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:23,080 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 396 transitions. [2021-03-10 21:44:23,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 396 transitions. [2021-03-10 21:44:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:23,080 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:23,080 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:23,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:23,289 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:23,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:23,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1323280610, now seen corresponding path program 62 times [2021-03-10 21:44:23,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:23,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453439155] [2021-03-10 21:44:23,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:23,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453439155] [2021-03-10 21:44:23,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324197439] [2021-03-10 21:44:23,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:23,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:23,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:23,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:23,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:23,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-10 21:44:23,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46993862] [2021-03-10 21:44:23,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:23,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:23,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:23,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:23,452 INFO L87 Difference]: Start difference. First operand 133 states and 396 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:23,607 INFO L93 Difference]: Finished difference Result 220 states and 636 transitions. [2021-03-10 21:44:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:23,608 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:23,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:23,608 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:44:23,608 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 21:44:23,608 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:44:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 21:44:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 130. [2021-03-10 21:44:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 3.0) internal successors, (387), 129 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 387 transitions. [2021-03-10 21:44:23,610 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 387 transitions. Word has length 16 [2021-03-10 21:44:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:23,610 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 387 transitions. [2021-03-10 21:44:23,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 387 transitions. [2021-03-10 21:44:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:23,611 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:23,611 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:23,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:23,811 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash 715054666, now seen corresponding path program 64 times [2021-03-10 21:44:23,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:23,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018911399] [2021-03-10 21:44:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:23,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018911399] [2021-03-10 21:44:23,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175282731] [2021-03-10 21:44:23,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:23,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:23,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:23,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:23,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:23,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:23,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:23,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376695144] [2021-03-10 21:44:23,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:23,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:23,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:23,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:23,947 INFO L87 Difference]: Start difference. First operand 130 states and 387 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:24,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:24,064 INFO L93 Difference]: Finished difference Result 267 states and 740 transitions. [2021-03-10 21:44:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:24,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:24,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:24,065 INFO L225 Difference]: With dead ends: 267 [2021-03-10 21:44:24,065 INFO L226 Difference]: Without dead ends: 267 [2021-03-10 21:44:24,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-03-10 21:44:24,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 138. [2021-03-10 21:44:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.116788321167883) internal successors, (427), 137 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 427 transitions. [2021-03-10 21:44:24,068 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 427 transitions. Word has length 16 [2021-03-10 21:44:24,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:24,069 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 427 transitions. [2021-03-10 21:44:24,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:24,069 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 427 transitions. [2021-03-10 21:44:24,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:24,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:24,069 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:24,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-03-10 21:44:24,283 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:24,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1910090840, now seen corresponding path program 63 times [2021-03-10 21:44:24,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:24,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418264280] [2021-03-10 21:44:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:24,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418264280] [2021-03-10 21:44:24,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482998351] [2021-03-10 21:44:24,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:24,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:44:24,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:24,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:24,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:24,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:24,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:44:24,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625571141] [2021-03-10 21:44:24,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:44:24,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:24,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:44:24,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:24,404 INFO L87 Difference]: Start difference. First operand 138 states and 427 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:24,488 INFO L93 Difference]: Finished difference Result 271 states and 760 transitions. [2021-03-10 21:44:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:24,488 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:24,489 INFO L225 Difference]: With dead ends: 271 [2021-03-10 21:44:24,489 INFO L226 Difference]: Without dead ends: 267 [2021-03-10 21:44:24,489 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-03-10 21:44:24,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 142. [2021-03-10 21:44:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.148936170212766) internal successors, (444), 141 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:24,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 444 transitions. [2021-03-10 21:44:24,491 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 444 transitions. Word has length 16 [2021-03-10 21:44:24,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:24,491 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 444 transitions. [2021-03-10 21:44:24,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:24,491 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 444 transitions. [2021-03-10 21:44:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:24,491 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:24,491 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:24,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-03-10 21:44:24,692 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:24,692 INFO L82 PathProgramCache]: Analyzing trace with hash -955921350, now seen corresponding path program 65 times [2021-03-10 21:44:24,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:24,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498317647] [2021-03-10 21:44:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:24,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498317647] [2021-03-10 21:44:24,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102870451] [2021-03-10 21:44:24,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:24,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:24,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:24,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:24,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:24,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406184540] [2021-03-10 21:44:24,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:24,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:24,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:24,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:24,815 INFO L87 Difference]: Start difference. First operand 142 states and 444 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:24,920 INFO L93 Difference]: Finished difference Result 260 states and 717 transitions. [2021-03-10 21:44:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:24,920 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:24,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:24,921 INFO L225 Difference]: With dead ends: 260 [2021-03-10 21:44:24,921 INFO L226 Difference]: Without dead ends: 257 [2021-03-10 21:44:24,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-03-10 21:44:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 145. [2021-03-10 21:44:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.1041666666666665) internal successors, (447), 144 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 447 transitions. [2021-03-10 21:44:24,923 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 447 transitions. Word has length 16 [2021-03-10 21:44:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:24,923 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 447 transitions. [2021-03-10 21:44:24,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 447 transitions. [2021-03-10 21:44:24,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:24,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:24,923 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:25,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:25,124 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:25,124 INFO L82 PathProgramCache]: Analyzing trace with hash -29897906, now seen corresponding path program 64 times [2021-03-10 21:44:25,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:25,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641603649] [2021-03-10 21:44:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:25,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641603649] [2021-03-10 21:44:25,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369811239] [2021-03-10 21:44:25,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:25,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:25,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:25,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:25,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:25,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:25,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:44:25,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23209417] [2021-03-10 21:44:25,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:44:25,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:25,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:44:25,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:25,242 INFO L87 Difference]: Start difference. First operand 145 states and 447 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:25,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:25,366 INFO L93 Difference]: Finished difference Result 278 states and 788 transitions. [2021-03-10 21:44:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:25,366 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:25,367 INFO L225 Difference]: With dead ends: 278 [2021-03-10 21:44:25,367 INFO L226 Difference]: Without dead ends: 278 [2021-03-10 21:44:25,367 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-03-10 21:44:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 139. [2021-03-10 21:44:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.0652173913043477) internal successors, (423), 138 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 423 transitions. [2021-03-10 21:44:25,369 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 423 transitions. Word has length 16 [2021-03-10 21:44:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:25,369 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 423 transitions. [2021-03-10 21:44:25,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 423 transitions. [2021-03-10 21:44:25,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:25,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:25,369 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:25,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:25,570 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:25,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:25,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1057638178, now seen corresponding path program 66 times [2021-03-10 21:44:25,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:25,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703995051] [2021-03-10 21:44:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:25,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703995051] [2021-03-10 21:44:25,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066755381] [2021-03-10 21:44:25,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:25,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:44:25,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:25,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:25,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:25,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:25,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:25,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785361591] [2021-03-10 21:44:25,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:25,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:25,700 INFO L87 Difference]: Start difference. First operand 139 states and 423 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:25,806 INFO L93 Difference]: Finished difference Result 239 states and 660 transitions. [2021-03-10 21:44:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:25,806 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:25,807 INFO L225 Difference]: With dead ends: 239 [2021-03-10 21:44:25,807 INFO L226 Difference]: Without dead ends: 239 [2021-03-10 21:44:25,807 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-03-10 21:44:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 134. [2021-03-10 21:44:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 3.045112781954887) internal successors, (405), 133 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 405 transitions. [2021-03-10 21:44:25,810 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 405 transitions. Word has length 16 [2021-03-10 21:44:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:25,810 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 405 transitions. [2021-03-10 21:44:25,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:25,810 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 405 transitions. [2021-03-10 21:44:25,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:25,810 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:25,810 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:26,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:26,023 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:26,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1265615764, now seen corresponding path program 67 times [2021-03-10 21:44:26,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:26,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727118934] [2021-03-10 21:44:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:26,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727118934] [2021-03-10 21:44:26,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623575976] [2021-03-10 21:44:26,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:26,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:26,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:26,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:26,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:26,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821038830] [2021-03-10 21:44:26,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:26,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:26,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:26,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:26,144 INFO L87 Difference]: Start difference. First operand 134 states and 405 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:26,249 INFO L93 Difference]: Finished difference Result 217 states and 606 transitions. [2021-03-10 21:44:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:26,250 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:26,250 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:44:26,250 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 21:44:26,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 21:44:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 132. [2021-03-10 21:44:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.030534351145038) internal successors, (397), 131 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 397 transitions. [2021-03-10 21:44:26,252 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 397 transitions. Word has length 16 [2021-03-10 21:44:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:26,252 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 397 transitions. [2021-03-10 21:44:26,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 397 transitions. [2021-03-10 21:44:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:26,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:26,252 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:26,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable395 [2021-03-10 21:44:26,453 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1168657166, now seen corresponding path program 65 times [2021-03-10 21:44:26,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:26,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304935413] [2021-03-10 21:44:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:26,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304935413] [2021-03-10 21:44:26,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:26,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:26,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773173936] [2021-03-10 21:44:26,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:26,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:26,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:26,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:26,483 INFO L87 Difference]: Start difference. First operand 132 states and 397 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:26,568 INFO L93 Difference]: Finished difference Result 227 states and 624 transitions. [2021-03-10 21:44:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:26,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:26,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:26,569 INFO L225 Difference]: With dead ends: 227 [2021-03-10 21:44:26,569 INFO L226 Difference]: Without dead ends: 223 [2021-03-10 21:44:26,569 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:26,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-03-10 21:44:26,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 134. [2021-03-10 21:44:26,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 3.0150375939849625) internal successors, (401), 133 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 401 transitions. [2021-03-10 21:44:26,571 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 401 transitions. Word has length 16 [2021-03-10 21:44:26,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:26,571 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 401 transitions. [2021-03-10 21:44:26,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,571 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 401 transitions. [2021-03-10 21:44:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:26,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:26,572 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:26,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398 [2021-03-10 21:44:26,572 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:26,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1095284686, now seen corresponding path program 66 times [2021-03-10 21:44:26,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:26,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620126655] [2021-03-10 21:44:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:26,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620126655] [2021-03-10 21:44:26,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:26,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:26,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643312795] [2021-03-10 21:44:26,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:26,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:26,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:26,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:26,606 INFO L87 Difference]: Start difference. First operand 134 states and 401 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:26,711 INFO L93 Difference]: Finished difference Result 210 states and 598 transitions. [2021-03-10 21:44:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:26,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:26,711 INFO L225 Difference]: With dead ends: 210 [2021-03-10 21:44:26,711 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 21:44:26,712 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 21:44:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 133. [2021-03-10 21:44:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.015151515151515) internal successors, (398), 132 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 398 transitions. [2021-03-10 21:44:26,713 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 398 transitions. Word has length 16 [2021-03-10 21:44:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:26,713 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 398 transitions. [2021-03-10 21:44:26,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 398 transitions. [2021-03-10 21:44:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:26,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:26,714 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:26,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399 [2021-03-10 21:44:26,714 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:26,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:26,714 INFO L82 PathProgramCache]: Analyzing trace with hash 429577900, now seen corresponding path program 68 times [2021-03-10 21:44:26,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:26,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565068604] [2021-03-10 21:44:26,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:26,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565068604] [2021-03-10 21:44:26,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:26,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:26,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139488373] [2021-03-10 21:44:26,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:26,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:26,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:26,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:26,748 INFO L87 Difference]: Start difference. First operand 133 states and 398 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:26,846 INFO L93 Difference]: Finished difference Result 227 states and 615 transitions. [2021-03-10 21:44:26,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:26,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:26,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:26,847 INFO L225 Difference]: With dead ends: 227 [2021-03-10 21:44:26,847 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 21:44:26,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 21:44:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 138. [2021-03-10 21:44:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.978102189781022) internal successors, (408), 137 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 408 transitions. [2021-03-10 21:44:26,849 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 408 transitions. Word has length 16 [2021-03-10 21:44:26,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:26,849 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 408 transitions. [2021-03-10 21:44:26,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,849 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 408 transitions. [2021-03-10 21:44:26,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:26,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:26,850 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:26,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400 [2021-03-10 21:44:26,850 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:26,850 INFO L82 PathProgramCache]: Analyzing trace with hash -667749676, now seen corresponding path program 69 times [2021-03-10 21:44:26,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:26,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28800411] [2021-03-10 21:44:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:26,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28800411] [2021-03-10 21:44:26,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:26,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:26,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544736235] [2021-03-10 21:44:26,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:26,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:26,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:26,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:26,884 INFO L87 Difference]: Start difference. First operand 138 states and 408 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:26,970 INFO L93 Difference]: Finished difference Result 214 states and 596 transitions. [2021-03-10 21:44:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:26,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:26,971 INFO L225 Difference]: With dead ends: 214 [2021-03-10 21:44:26,971 INFO L226 Difference]: Without dead ends: 211 [2021-03-10 21:44:26,971 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-10 21:44:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 133. [2021-03-10 21:44:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.007575757575758) internal successors, (397), 132 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 397 transitions. [2021-03-10 21:44:26,973 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 397 transitions. Word has length 16 [2021-03-10 21:44:26,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:26,973 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 397 transitions. [2021-03-10 21:44:26,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:26,973 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 397 transitions. [2021-03-10 21:44:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:26,973 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:26,973 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:26,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401 [2021-03-10 21:44:26,973 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:26,974 INFO L82 PathProgramCache]: Analyzing trace with hash 271584158, now seen corresponding path program 67 times [2021-03-10 21:44:26,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:26,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229858165] [2021-03-10 21:44:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:27,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229858165] [2021-03-10 21:44:27,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739497588] [2021-03-10 21:44:27,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:44:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:27,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:27,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:27,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:44:27,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299207821] [2021-03-10 21:44:27,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:44:27,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:27,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:44:27,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:27,116 INFO L87 Difference]: Start difference. First operand 133 states and 397 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:27,226 INFO L93 Difference]: Finished difference Result 240 states and 672 transitions. [2021-03-10 21:44:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:27,227 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:27,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:27,227 INFO L225 Difference]: With dead ends: 240 [2021-03-10 21:44:27,227 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:44:27,227 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:27,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:44:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 135. [2021-03-10 21:44:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 3.0223880597014925) internal successors, (405), 134 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 405 transitions. [2021-03-10 21:44:27,230 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 405 transitions. Word has length 16 [2021-03-10 21:44:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:27,230 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 405 transitions. [2021-03-10 21:44:27,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 405 transitions. [2021-03-10 21:44:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:27,230 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:27,230 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:27,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-03-10 21:44:27,431 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:27,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:27,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1633140264, now seen corresponding path program 68 times [2021-03-10 21:44:27,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:27,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154767137] [2021-03-10 21:44:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:27,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154767137] [2021-03-10 21:44:27,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:27,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:27,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934988099] [2021-03-10 21:44:27,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:27,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:27,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:27,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:27,463 INFO L87 Difference]: Start difference. First operand 135 states and 405 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:27,557 INFO L93 Difference]: Finished difference Result 217 states and 619 transitions. [2021-03-10 21:44:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:27,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:27,557 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:44:27,557 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 21:44:27,558 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 21:44:27,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 132. [2021-03-10 21:44:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.0076335877862594) internal successors, (394), 131 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 394 transitions. [2021-03-10 21:44:27,559 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 394 transitions. Word has length 16 [2021-03-10 21:44:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:27,559 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 394 transitions. [2021-03-10 21:44:27,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 394 transitions. [2021-03-10 21:44:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:27,560 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:27,560 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:27,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403 [2021-03-10 21:44:27,560 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:27,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1191160378, now seen corresponding path program 70 times [2021-03-10 21:44:27,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:27,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575025833] [2021-03-10 21:44:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:27,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575025833] [2021-03-10 21:44:27,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:27,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:27,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649260003] [2021-03-10 21:44:27,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:27,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:27,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:27,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:27,589 INFO L87 Difference]: Start difference. First operand 132 states and 394 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:27,665 INFO L93 Difference]: Finished difference Result 218 states and 587 transitions. [2021-03-10 21:44:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:27,665 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:27,665 INFO L225 Difference]: With dead ends: 218 [2021-03-10 21:44:27,665 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 21:44:27,665 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:27,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 21:44:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 133. [2021-03-10 21:44:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.992424242424242) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 395 transitions. [2021-03-10 21:44:27,667 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 395 transitions. Word has length 16 [2021-03-10 21:44:27,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:27,667 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 395 transitions. [2021-03-10 21:44:27,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,667 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 395 transitions. [2021-03-10 21:44:27,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:27,668 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:27,668 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:27,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404 [2021-03-10 21:44:27,668 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:27,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:27,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1677206220, now seen corresponding path program 71 times [2021-03-10 21:44:27,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:27,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191779453] [2021-03-10 21:44:27,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:27,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191779453] [2021-03-10 21:44:27,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:27,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:27,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136741552] [2021-03-10 21:44:27,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:27,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:27,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:27,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:27,700 INFO L87 Difference]: Start difference. First operand 133 states and 395 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:27,785 INFO L93 Difference]: Finished difference Result 215 states and 577 transitions. [2021-03-10 21:44:27,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:27,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:27,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:27,786 INFO L225 Difference]: With dead ends: 215 [2021-03-10 21:44:27,786 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 21:44:27,786 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:27,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 21:44:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 138. [2021-03-10 21:44:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.9562043795620436) internal successors, (405), 137 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 405 transitions. [2021-03-10 21:44:27,788 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 405 transitions. Word has length 16 [2021-03-10 21:44:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:27,788 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 405 transitions. [2021-03-10 21:44:27,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,788 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 405 transitions. [2021-03-10 21:44:27,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:27,788 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:27,788 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:27,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405 [2021-03-10 21:44:27,788 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:27,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1520433500, now seen corresponding path program 72 times [2021-03-10 21:44:27,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:27,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560085861] [2021-03-10 21:44:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:27,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560085861] [2021-03-10 21:44:27,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:27,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:27,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315948993] [2021-03-10 21:44:27,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:27,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:27,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:27,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:27,820 INFO L87 Difference]: Start difference. First operand 138 states and 405 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:27,906 INFO L93 Difference]: Finished difference Result 202 states and 558 transitions. [2021-03-10 21:44:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:27,907 INFO L225 Difference]: With dead ends: 202 [2021-03-10 21:44:27,907 INFO L226 Difference]: Without dead ends: 198 [2021-03-10 21:44:27,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-03-10 21:44:27,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 132. [2021-03-10 21:44:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.0) internal successors, (393), 131 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 393 transitions. [2021-03-10 21:44:27,908 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 393 transitions. Word has length 16 [2021-03-10 21:44:27,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:27,909 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 393 transitions. [2021-03-10 21:44:27,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 393 transitions. [2021-03-10 21:44:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:27,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:27,909 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:27,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406 [2021-03-10 21:44:27,909 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:27,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:27,909 INFO L82 PathProgramCache]: Analyzing trace with hash -567271218, now seen corresponding path program 69 times [2021-03-10 21:44:27,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:27,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574351823] [2021-03-10 21:44:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:27,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574351823] [2021-03-10 21:44:27,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154762918] [2021-03-10 21:44:27,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:27,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:27,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:27,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:27,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:28,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:28,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:44:28,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549706] [2021-03-10 21:44:28,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:44:28,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:28,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:44:28,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:44:28,003 INFO L87 Difference]: Start difference. First operand 132 states and 393 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:28,096 INFO L93 Difference]: Finished difference Result 274 states and 793 transitions. [2021-03-10 21:44:28,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:28,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:28,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:28,097 INFO L225 Difference]: With dead ends: 274 [2021-03-10 21:44:28,097 INFO L226 Difference]: Without dead ends: 274 [2021-03-10 21:44:28,097 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:28,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-03-10 21:44:28,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 134. [2021-03-10 21:44:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 3.0) internal successors, (399), 133 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 399 transitions. [2021-03-10 21:44:28,099 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 399 transitions. Word has length 16 [2021-03-10 21:44:28,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:28,099 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 399 transitions. [2021-03-10 21:44:28,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 399 transitions. [2021-03-10 21:44:28,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:28,100 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:28,100 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:28,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:28,303 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:28,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:28,303 INFO L82 PathProgramCache]: Analyzing trace with hash 859329480, now seen corresponding path program 70 times [2021-03-10 21:44:28,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:28,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076878219] [2021-03-10 21:44:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:28,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076878219] [2021-03-10 21:44:28,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134456760] [2021-03-10 21:44:28,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:28,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:28,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:28,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:28,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:28,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:28,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:44:28,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834101279] [2021-03-10 21:44:28,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:44:28,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:28,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:44:28,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:44:28,411 INFO L87 Difference]: Start difference. First operand 134 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:28,523 INFO L93 Difference]: Finished difference Result 253 states and 716 transitions. [2021-03-10 21:44:28,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:28,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:28,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:28,524 INFO L225 Difference]: With dead ends: 253 [2021-03-10 21:44:28,524 INFO L226 Difference]: Without dead ends: 253 [2021-03-10 21:44:28,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:28,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-03-10 21:44:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 136. [2021-03-10 21:44:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.0148148148148146) internal successors, (407), 135 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 407 transitions. [2021-03-10 21:44:28,527 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 407 transitions. Word has length 16 [2021-03-10 21:44:28,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:28,527 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 407 transitions. [2021-03-10 21:44:28,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:28,527 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 407 transitions. [2021-03-10 21:44:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:28,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:28,527 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:28,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-03-10 21:44:28,743 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:28,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2074081710, now seen corresponding path program 71 times [2021-03-10 21:44:28,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:28,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077741331] [2021-03-10 21:44:28,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:28,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077741331] [2021-03-10 21:44:28,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:28,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:28,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034606693] [2021-03-10 21:44:28,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:28,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:28,780 INFO L87 Difference]: Start difference. First operand 136 states and 407 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:28,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:28,873 INFO L93 Difference]: Finished difference Result 230 states and 663 transitions. [2021-03-10 21:44:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:28,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:28,874 INFO L225 Difference]: With dead ends: 230 [2021-03-10 21:44:28,874 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 21:44:28,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 21:44:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 131. [2021-03-10 21:44:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 3.0) internal successors, (390), 130 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 390 transitions. [2021-03-10 21:44:28,876 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 390 transitions. Word has length 16 [2021-03-10 21:44:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:28,876 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 390 transitions. [2021-03-10 21:44:28,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 390 transitions. [2021-03-10 21:44:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:28,877 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:28,877 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:28,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409 [2021-03-10 21:44:28,877 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:28,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash -2096777692, now seen corresponding path program 73 times [2021-03-10 21:44:28,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:28,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315300483] [2021-03-10 21:44:28,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:28,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315300483] [2021-03-10 21:44:28,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316862354] [2021-03-10 21:44:28,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:28,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:28,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:29,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:29,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-10 21:44:29,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150199815] [2021-03-10 21:44:29,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:29,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:29,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:29,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:29,025 INFO L87 Difference]: Start difference. First operand 131 states and 390 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:29,208 INFO L93 Difference]: Finished difference Result 217 states and 589 transitions. [2021-03-10 21:44:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:29,208 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:29,209 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:44:29,209 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:44:29,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:44:29,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 136. [2021-03-10 21:44:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.074074074074074) internal successors, (415), 135 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 415 transitions. [2021-03-10 21:44:29,211 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 415 transitions. Word has length 16 [2021-03-10 21:44:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:29,211 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 415 transitions. [2021-03-10 21:44:29,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 415 transitions. [2021-03-10 21:44:29,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:29,212 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:29,212 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:29,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-03-10 21:44:29,432 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:29,432 INFO L82 PathProgramCache]: Analyzing trace with hash -901741518, now seen corresponding path program 72 times [2021-03-10 21:44:29,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:29,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031231469] [2021-03-10 21:44:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:29,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031231469] [2021-03-10 21:44:29,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091273341] [2021-03-10 21:44:29,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:29,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:44:29,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:29,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:29,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:29,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:29,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:29,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597112607] [2021-03-10 21:44:29,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:29,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:29,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:29,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:29,566 INFO L87 Difference]: Start difference. First operand 136 states and 415 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:29,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:29,656 INFO L93 Difference]: Finished difference Result 211 states and 579 transitions. [2021-03-10 21:44:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:29,657 INFO L225 Difference]: With dead ends: 211 [2021-03-10 21:44:29,657 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 21:44:29,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 21:44:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2021-03-10 21:44:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.1214285714285714) internal successors, (437), 140 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 437 transitions. [2021-03-10 21:44:29,659 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 437 transitions. Word has length 16 [2021-03-10 21:44:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:29,659 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 437 transitions. [2021-03-10 21:44:29,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 437 transitions. [2021-03-10 21:44:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:29,659 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:29,659 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:29,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-03-10 21:44:29,859 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:29,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:29,860 INFO L82 PathProgramCache]: Analyzing trace with hash 527213588, now seen corresponding path program 74 times [2021-03-10 21:44:29,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:29,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252426527] [2021-03-10 21:44:29,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:29,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252426527] [2021-03-10 21:44:29,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521834680] [2021-03-10 21:44:29,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:29,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:29,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:29,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:29,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:30,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:30,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-03-10 21:44:30,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641529947] [2021-03-10 21:44:30,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:44:30,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:30,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:44:30,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:30,024 INFO L87 Difference]: Start difference. First operand 141 states and 437 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:30,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:30,197 INFO L93 Difference]: Finished difference Result 221 states and 603 transitions. [2021-03-10 21:44:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:30,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:30,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:30,198 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:44:30,198 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 21:44:30,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 21:44:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 144. [2021-03-10 21:44:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 3.076923076923077) internal successors, (440), 143 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 440 transitions. [2021-03-10 21:44:30,200 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 440 transitions. Word has length 16 [2021-03-10 21:44:30,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:30,200 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 440 transitions. [2021-03-10 21:44:30,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:30,200 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 440 transitions. [2021-03-10 21:44:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:30,201 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:30,201 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:30,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-03-10 21:44:30,415 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:30,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:30,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1453237032, now seen corresponding path program 73 times [2021-03-10 21:44:30,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:30,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657459108] [2021-03-10 21:44:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:30,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657459108] [2021-03-10 21:44:30,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137981210] [2021-03-10 21:44:30,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:30,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:30,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:30,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:30,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:30,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806289423] [2021-03-10 21:44:30,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:30,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:30,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:30,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:30,540 INFO L87 Difference]: Start difference. First operand 144 states and 440 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:30,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:30,633 INFO L93 Difference]: Finished difference Result 220 states and 605 transitions. [2021-03-10 21:44:30,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:30,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:30,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:30,633 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:44:30,633 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 21:44:30,634 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:30,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 21:44:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 138. [2021-03-10 21:44:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0364963503649633) internal successors, (416), 137 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 416 transitions. [2021-03-10 21:44:30,635 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 416 transitions. Word has length 16 [2021-03-10 21:44:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:30,636 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 416 transitions. [2021-03-10 21:44:30,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:30,636 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 416 transitions. [2021-03-10 21:44:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:30,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:30,636 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:30,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:30,836 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:30,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:30,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1754194180, now seen corresponding path program 75 times [2021-03-10 21:44:30,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:30,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096477142] [2021-03-10 21:44:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:30,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096477142] [2021-03-10 21:44:30,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476845804] [2021-03-10 21:44:30,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:30,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:30,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:30,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:30,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:30,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:30,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:30,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503262523] [2021-03-10 21:44:30,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:30,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:30,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:30,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:30,965 INFO L87 Difference]: Start difference. First operand 138 states and 416 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:31,060 INFO L93 Difference]: Finished difference Result 250 states and 667 transitions. [2021-03-10 21:44:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:31,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:31,061 INFO L225 Difference]: With dead ends: 250 [2021-03-10 21:44:31,061 INFO L226 Difference]: Without dead ends: 250 [2021-03-10 21:44:31,061 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:31,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-03-10 21:44:31,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 140. [2021-03-10 21:44:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.050359712230216) internal successors, (424), 139 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 424 transitions. [2021-03-10 21:44:31,063 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 424 transitions. Word has length 16 [2021-03-10 21:44:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:31,064 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 424 transitions. [2021-03-10 21:44:31,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 424 transitions. [2021-03-10 21:44:31,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:31,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:31,064 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:31,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:31,264 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:31,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:31,265 INFO L82 PathProgramCache]: Analyzing trace with hash 217519174, now seen corresponding path program 76 times [2021-03-10 21:44:31,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:31,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454509965] [2021-03-10 21:44:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:31,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454509965] [2021-03-10 21:44:31,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938322870] [2021-03-10 21:44:31,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:31,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:31,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:31,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:31,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:31,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:31,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:31,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782905063] [2021-03-10 21:44:31,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:31,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:31,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:31,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:31,386 INFO L87 Difference]: Start difference. First operand 140 states and 424 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:31,475 INFO L93 Difference]: Finished difference Result 228 states and 613 transitions. [2021-03-10 21:44:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:31,476 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:31,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:31,476 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:44:31,476 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 21:44:31,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 21:44:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 138. [2021-03-10 21:44:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0364963503649633) internal successors, (416), 137 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 416 transitions. [2021-03-10 21:44:31,478 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 416 transitions. Word has length 16 [2021-03-10 21:44:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:31,478 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 416 transitions. [2021-03-10 21:44:31,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 416 transitions. [2021-03-10 21:44:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:31,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:31,479 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:31,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-03-10 21:44:31,679 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:31,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:31,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1643175192, now seen corresponding path program 74 times [2021-03-10 21:44:31,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:31,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616130122] [2021-03-10 21:44:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:31,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616130122] [2021-03-10 21:44:31,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:31,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:31,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833968762] [2021-03-10 21:44:31,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:31,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:31,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:31,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:31,721 INFO L87 Difference]: Start difference. First operand 138 states and 416 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:31,856 INFO L93 Difference]: Finished difference Result 235 states and 620 transitions. [2021-03-10 21:44:31,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:31,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:31,857 INFO L225 Difference]: With dead ends: 235 [2021-03-10 21:44:31,857 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 21:44:31,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 21:44:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 140. [2021-03-10 21:44:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.0215827338129495) internal successors, (420), 139 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 420 transitions. [2021-03-10 21:44:31,859 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 420 transitions. Word has length 16 [2021-03-10 21:44:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:31,859 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 420 transitions. [2021-03-10 21:44:31,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 420 transitions. [2021-03-10 21:44:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:31,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:31,860 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:31,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422 [2021-03-10 21:44:31,860 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:31,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1716547672, now seen corresponding path program 75 times [2021-03-10 21:44:31,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:31,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62693374] [2021-03-10 21:44:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:31,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62693374] [2021-03-10 21:44:31,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:31,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:31,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029478252] [2021-03-10 21:44:31,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:31,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:31,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:31,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:31,893 INFO L87 Difference]: Start difference. First operand 140 states and 420 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:32,017 INFO L93 Difference]: Finished difference Result 218 states and 594 transitions. [2021-03-10 21:44:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:32,018 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:32,018 INFO L225 Difference]: With dead ends: 218 [2021-03-10 21:44:32,018 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 21:44:32,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 21:44:32,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 138. [2021-03-10 21:44:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0291970802919708) internal successors, (415), 137 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 415 transitions. [2021-03-10 21:44:32,021 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 415 transitions. Word has length 16 [2021-03-10 21:44:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:32,021 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 415 transitions. [2021-03-10 21:44:32,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 415 transitions. [2021-03-10 21:44:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:32,021 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:32,021 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:32,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423 [2021-03-10 21:44:32,021 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:32,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:32,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1912712838, now seen corresponding path program 77 times [2021-03-10 21:44:32,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:32,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514266976] [2021-03-10 21:44:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:32,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514266976] [2021-03-10 21:44:32,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:32,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:32,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243810044] [2021-03-10 21:44:32,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:32,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:32,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:32,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:32,061 INFO L87 Difference]: Start difference. First operand 138 states and 415 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:32,150 INFO L93 Difference]: Finished difference Result 235 states and 613 transitions. [2021-03-10 21:44:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:32,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:32,151 INFO L225 Difference]: With dead ends: 235 [2021-03-10 21:44:32,151 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:44:32,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:44:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 140. [2021-03-10 21:44:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.014388489208633) internal successors, (419), 139 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 419 transitions. [2021-03-10 21:44:32,153 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 419 transitions. Word has length 16 [2021-03-10 21:44:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:32,153 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 419 transitions. [2021-03-10 21:44:32,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 419 transitions. [2021-03-10 21:44:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:32,153 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:32,153 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:32,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424 [2021-03-10 21:44:32,153 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:32,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:32,154 INFO L82 PathProgramCache]: Analyzing trace with hash 815385262, now seen corresponding path program 78 times [2021-03-10 21:44:32,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:32,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036878636] [2021-03-10 21:44:32,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:32,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036878636] [2021-03-10 21:44:32,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:32,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:32,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125661296] [2021-03-10 21:44:32,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:32,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:32,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:32,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:32,191 INFO L87 Difference]: Start difference. First operand 140 states and 419 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:32,276 INFO L93 Difference]: Finished difference Result 221 states and 592 transitions. [2021-03-10 21:44:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:32,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:32,277 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:44:32,277 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 21:44:32,277 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:32,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 21:44:32,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 139. [2021-03-10 21:44:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.0144927536231885) internal successors, (416), 138 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 416 transitions. [2021-03-10 21:44:32,279 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 416 transitions. Word has length 16 [2021-03-10 21:44:32,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:32,279 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 416 transitions. [2021-03-10 21:44:32,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 416 transitions. [2021-03-10 21:44:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:32,280 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:32,280 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:32,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425 [2021-03-10 21:44:32,280 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:32,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1754719096, now seen corresponding path program 76 times [2021-03-10 21:44:32,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:32,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782663946] [2021-03-10 21:44:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:32,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782663946] [2021-03-10 21:44:32,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062577660] [2021-03-10 21:44:32,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:32,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:32,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:32,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:32,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:32,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:32,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:32,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533930266] [2021-03-10 21:44:32,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:32,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:32,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:32,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:32,404 INFO L87 Difference]: Start difference. First operand 139 states and 416 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:32,506 INFO L93 Difference]: Finished difference Result 254 states and 684 transitions. [2021-03-10 21:44:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:32,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:32,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:32,507 INFO L225 Difference]: With dead ends: 254 [2021-03-10 21:44:32,507 INFO L226 Difference]: Without dead ends: 254 [2021-03-10 21:44:32,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-03-10 21:44:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 141. [2021-03-10 21:44:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.0285714285714285) internal successors, (424), 140 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 424 transitions. [2021-03-10 21:44:32,509 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 424 transitions. Word has length 16 [2021-03-10 21:44:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:32,509 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 424 transitions. [2021-03-10 21:44:32,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,509 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 424 transitions. [2021-03-10 21:44:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:32,509 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:32,509 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:32,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-03-10 21:44:32,710 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:32,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:32,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1178692094, now seen corresponding path program 77 times [2021-03-10 21:44:32,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:32,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151209752] [2021-03-10 21:44:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:32,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151209752] [2021-03-10 21:44:32,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:32,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:32,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013668115] [2021-03-10 21:44:32,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:32,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:32,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:32,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:32,744 INFO L87 Difference]: Start difference. First operand 141 states and 424 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:32,864 INFO L93 Difference]: Finished difference Result 228 states and 620 transitions. [2021-03-10 21:44:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:32,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:32,865 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:44:32,865 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 21:44:32,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 21:44:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 137. [2021-03-10 21:44:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.0) internal successors, (408), 136 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 408 transitions. [2021-03-10 21:44:32,867 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 408 transitions. Word has length 16 [2021-03-10 21:44:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:32,867 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 408 transitions. [2021-03-10 21:44:32,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 408 transitions. [2021-03-10 21:44:32,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:32,867 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:32,868 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:32,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427 [2021-03-10 21:44:32,868 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:32,868 INFO L82 PathProgramCache]: Analyzing trace with hash 433988996, now seen corresponding path program 79 times [2021-03-10 21:44:32,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:32,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69691855] [2021-03-10 21:44:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:32,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69691855] [2021-03-10 21:44:32,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301087129] [2021-03-10 21:44:32,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:32,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:32,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:32,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:32,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:32,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420233712] [2021-03-10 21:44:32,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:32,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:32,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:32,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:32,992 INFO L87 Difference]: Start difference. First operand 137 states and 408 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:33,094 INFO L93 Difference]: Finished difference Result 206 states and 557 transitions. [2021-03-10 21:44:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:33,095 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:44:33,095 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 21:44:33,095 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 21:44:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2021-03-10 21:44:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.9555555555555557) internal successors, (399), 135 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:33,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 399 transitions. [2021-03-10 21:44:33,097 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 399 transitions. Word has length 16 [2021-03-10 21:44:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:33,097 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 399 transitions. [2021-03-10 21:44:33,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 399 transitions. [2021-03-10 21:44:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:33,097 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:33,097 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:33,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:33,298 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:33,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1889264946, now seen corresponding path program 80 times [2021-03-10 21:44:33,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:33,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538660780] [2021-03-10 21:44:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:33,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538660780] [2021-03-10 21:44:33,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114329747] [2021-03-10 21:44:33,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:33,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:33,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:33,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:33,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:33,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:33,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380206490] [2021-03-10 21:44:33,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:33,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:33,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:33,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:33,445 INFO L87 Difference]: Start difference. First operand 136 states and 399 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:33,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:33,569 INFO L93 Difference]: Finished difference Result 197 states and 530 transitions. [2021-03-10 21:44:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:33,570 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:33,570 INFO L225 Difference]: With dead ends: 197 [2021-03-10 21:44:33,571 INFO L226 Difference]: Without dead ends: 195 [2021-03-10 21:44:33,571 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-03-10 21:44:33,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 130. [2021-03-10 21:44:33,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.9689922480620154) internal successors, (383), 129 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:33,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 383 transitions. [2021-03-10 21:44:33,573 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 383 transitions. Word has length 16 [2021-03-10 21:44:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:33,573 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 383 transitions. [2021-03-10 21:44:33,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 383 transitions. [2021-03-10 21:44:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:33,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:33,573 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:33,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-03-10 21:44:33,797 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1506544558, now seen corresponding path program 81 times [2021-03-10 21:44:33,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:33,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38981784] [2021-03-10 21:44:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:33,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38981784] [2021-03-10 21:44:33,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18086936] [2021-03-10 21:44:33,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:33,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:44:33,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:33,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:33,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:33,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:33,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:44:33,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226687569] [2021-03-10 21:44:33,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:44:33,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:33,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:44:33,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:33,918 INFO L87 Difference]: Start difference. First operand 130 states and 383 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:34,039 INFO L93 Difference]: Finished difference Result 176 states and 481 transitions. [2021-03-10 21:44:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:34,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:34,040 INFO L225 Difference]: With dead ends: 176 [2021-03-10 21:44:34,040 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 21:44:34,040 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 21:44:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 128. [2021-03-10 21:44:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.952755905511811) internal successors, (375), 127 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 375 transitions. [2021-03-10 21:44:34,042 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 375 transitions. Word has length 16 [2021-03-10 21:44:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:34,042 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 375 transitions. [2021-03-10 21:44:34,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 375 transitions. [2021-03-10 21:44:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:34,043 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:34,043 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:34,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-03-10 21:44:34,263 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:34,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1055429870, now seen corresponding path program 78 times [2021-03-10 21:44:34,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:34,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741470034] [2021-03-10 21:44:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:34,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741470034] [2021-03-10 21:44:34,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:34,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:34,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446074963] [2021-03-10 21:44:34,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:34,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:34,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:34,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:34,297 INFO L87 Difference]: Start difference. First operand 128 states and 375 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:34,414 INFO L93 Difference]: Finished difference Result 175 states and 467 transitions. [2021-03-10 21:44:34,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:34,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:34,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:34,415 INFO L225 Difference]: With dead ends: 175 [2021-03-10 21:44:34,415 INFO L226 Difference]: Without dead ends: 171 [2021-03-10 21:44:34,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-03-10 21:44:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 132. [2021-03-10 21:44:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.931297709923664) internal successors, (384), 131 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 384 transitions. [2021-03-10 21:44:34,417 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 384 transitions. Word has length 16 [2021-03-10 21:44:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:34,417 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 384 transitions. [2021-03-10 21:44:34,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 384 transitions. [2021-03-10 21:44:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:34,417 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:34,417 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:34,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435 [2021-03-10 21:44:34,417 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:34,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1128802350, now seen corresponding path program 79 times [2021-03-10 21:44:34,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:34,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208634867] [2021-03-10 21:44:34,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:34,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208634867] [2021-03-10 21:44:34,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:34,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:34,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163164939] [2021-03-10 21:44:34,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:34,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:34,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:34,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:34,459 INFO L87 Difference]: Start difference. First operand 132 states and 384 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:34,588 INFO L93 Difference]: Finished difference Result 173 states and 464 transitions. [2021-03-10 21:44:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:34,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:34,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:34,589 INFO L225 Difference]: With dead ends: 173 [2021-03-10 21:44:34,589 INFO L226 Difference]: Without dead ends: 170 [2021-03-10 21:44:34,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:34,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-03-10 21:44:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 130. [2021-03-10 21:44:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.937984496124031) internal successors, (379), 129 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 379 transitions. [2021-03-10 21:44:34,590 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 379 transitions. Word has length 16 [2021-03-10 21:44:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:34,590 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 379 transitions. [2021-03-10 21:44:34,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,591 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 379 transitions. [2021-03-10 21:44:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:34,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:34,591 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:34,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436 [2021-03-10 21:44:34,591 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:34,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1126176574, now seen corresponding path program 80 times [2021-03-10 21:44:34,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:34,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737371401] [2021-03-10 21:44:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:34,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737371401] [2021-03-10 21:44:34,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:34,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:34,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950058354] [2021-03-10 21:44:34,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:34,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:34,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:34,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:34,619 INFO L87 Difference]: Start difference. First operand 130 states and 379 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:34,721 INFO L93 Difference]: Finished difference Result 161 states and 446 transitions. [2021-03-10 21:44:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:34,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:34,722 INFO L225 Difference]: With dead ends: 161 [2021-03-10 21:44:34,722 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 21:44:34,722 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 21:44:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 129. [2021-03-10 21:44:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9375) internal successors, (376), 128 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 376 transitions. [2021-03-10 21:44:34,724 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 376 transitions. Word has length 16 [2021-03-10 21:44:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:34,724 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 376 transitions. [2021-03-10 21:44:34,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 376 transitions. [2021-03-10 21:44:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:34,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:34,724 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:34,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437 [2021-03-10 21:44:34,724 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:34,724 INFO L82 PathProgramCache]: Analyzing trace with hash -700417548, now seen corresponding path program 82 times [2021-03-10 21:44:34,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:34,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891136611] [2021-03-10 21:44:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:34,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891136611] [2021-03-10 21:44:34,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:34,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:34,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926693424] [2021-03-10 21:44:34,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:34,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:34,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:34,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:34,756 INFO L87 Difference]: Start difference. First operand 129 states and 376 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:34,832 INFO L93 Difference]: Finished difference Result 186 states and 490 transitions. [2021-03-10 21:44:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:34,832 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:34,832 INFO L225 Difference]: With dead ends: 186 [2021-03-10 21:44:34,832 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 21:44:34,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 21:44:34,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-03-10 21:44:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.8962962962962964) internal successors, (391), 135 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 391 transitions. [2021-03-10 21:44:34,834 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 391 transitions. Word has length 16 [2021-03-10 21:44:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:34,834 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 391 transitions. [2021-03-10 21:44:34,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,834 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 391 transitions. [2021-03-10 21:44:34,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:34,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:34,834 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:34,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438 [2021-03-10 21:44:34,835 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:34,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:34,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1797745124, now seen corresponding path program 83 times [2021-03-10 21:44:34,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:34,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248880780] [2021-03-10 21:44:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:34,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248880780] [2021-03-10 21:44:34,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:34,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:34,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954565615] [2021-03-10 21:44:34,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:34,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:34,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:34,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:34,866 INFO L87 Difference]: Start difference. First operand 136 states and 391 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:34,949 INFO L93 Difference]: Finished difference Result 185 states and 488 transitions. [2021-03-10 21:44:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:34,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:34,949 INFO L225 Difference]: With dead ends: 185 [2021-03-10 21:44:34,950 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 21:44:34,950 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 21:44:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 135. [2021-03-10 21:44:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8955223880597014) internal successors, (388), 134 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 388 transitions. [2021-03-10 21:44:34,951 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 388 transitions. Word has length 16 [2021-03-10 21:44:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:34,951 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 388 transitions. [2021-03-10 21:44:34,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 388 transitions. [2021-03-10 21:44:34,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:34,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:34,952 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:34,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439 [2021-03-10 21:44:34,952 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:34,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:34,952 INFO L82 PathProgramCache]: Analyzing trace with hash 351051412, now seen corresponding path program 84 times [2021-03-10 21:44:34,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:34,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612716025] [2021-03-10 21:44:34,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:34,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612716025] [2021-03-10 21:44:34,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:34,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:34,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978727707] [2021-03-10 21:44:34,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:34,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:34,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:34,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:34,982 INFO L87 Difference]: Start difference. First operand 135 states and 388 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:35,054 INFO L93 Difference]: Finished difference Result 172 states and 468 transitions. [2021-03-10 21:44:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:35,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:35,055 INFO L225 Difference]: With dead ends: 172 [2021-03-10 21:44:35,055 INFO L226 Difference]: Without dead ends: 167 [2021-03-10 21:44:35,055 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-03-10 21:44:35,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2021-03-10 21:44:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9296875) internal successors, (375), 128 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 375 transitions. [2021-03-10 21:44:35,057 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 375 transitions. Word has length 16 [2021-03-10 21:44:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:35,057 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 375 transitions. [2021-03-10 21:44:35,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 375 transitions. [2021-03-10 21:44:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:35,058 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:35,058 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:35,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440 [2021-03-10 21:44:35,058 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:35,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:35,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1836118152, now seen corresponding path program 81 times [2021-03-10 21:44:35,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:35,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814885613] [2021-03-10 21:44:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:35,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814885613] [2021-03-10 21:44:35,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82507879] [2021-03-10 21:44:35,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:35,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:35,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:35,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:35,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:35,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:35,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:44:35,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69715336] [2021-03-10 21:44:35,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:44:35,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:35,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:44:35,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:35,218 INFO L87 Difference]: Start difference. First operand 129 states and 375 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:35,348 INFO L93 Difference]: Finished difference Result 197 states and 540 transitions. [2021-03-10 21:44:35,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:35,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:35,349 INFO L225 Difference]: With dead ends: 197 [2021-03-10 21:44:35,349 INFO L226 Difference]: Without dead ends: 197 [2021-03-10 21:44:35,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-03-10 21:44:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 133. [2021-03-10 21:44:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.962121212121212) internal successors, (391), 132 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 391 transitions. [2021-03-10 21:44:35,351 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 391 transitions. Word has length 16 [2021-03-10 21:44:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:35,351 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 391 transitions. [2021-03-10 21:44:35,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 391 transitions. [2021-03-10 21:44:35,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:35,351 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:35,352 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:35,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-03-10 21:44:35,552 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:35,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:35,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1097293038, now seen corresponding path program 82 times [2021-03-10 21:44:35,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:35,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902739440] [2021-03-10 21:44:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:35,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902739440] [2021-03-10 21:44:35,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:35,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:35,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339333699] [2021-03-10 21:44:35,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:35,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:35,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:35,587 INFO L87 Difference]: Start difference. First operand 133 states and 391 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:35,709 INFO L93 Difference]: Finished difference Result 193 states and 523 transitions. [2021-03-10 21:44:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:35,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:35,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:35,710 INFO L225 Difference]: With dead ends: 193 [2021-03-10 21:44:35,710 INFO L226 Difference]: Without dead ends: 191 [2021-03-10 21:44:35,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:35,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-03-10 21:44:35,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 131. [2021-03-10 21:44:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.9461538461538463) internal successors, (383), 130 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 383 transitions. [2021-03-10 21:44:35,712 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 383 transitions. Word has length 16 [2021-03-10 21:44:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:35,712 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 383 transitions. [2021-03-10 21:44:35,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,712 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 383 transitions. [2021-03-10 21:44:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:35,712 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:35,712 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:35,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable442 [2021-03-10 21:44:35,712 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:35,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1632522840, now seen corresponding path program 83 times [2021-03-10 21:44:35,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:35,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795189398] [2021-03-10 21:44:35,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:35,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795189398] [2021-03-10 21:44:35,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:35,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:35,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432603376] [2021-03-10 21:44:35,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:35,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:35,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:35,743 INFO L87 Difference]: Start difference. First operand 131 states and 383 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:35,853 INFO L93 Difference]: Finished difference Result 170 states and 473 transitions. [2021-03-10 21:44:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:35,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:35,854 INFO L225 Difference]: With dead ends: 170 [2021-03-10 21:44:35,854 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 21:44:35,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:35,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 21:44:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 128. [2021-03-10 21:44:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.9291338582677167) internal successors, (372), 127 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 372 transitions. [2021-03-10 21:44:35,856 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 372 transitions. Word has length 16 [2021-03-10 21:44:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:35,856 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 372 transitions. [2021-03-10 21:44:35,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 372 transitions. [2021-03-10 21:44:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:35,856 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:35,856 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:35,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443 [2021-03-10 21:44:35,856 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:35,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:35,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1788497036, now seen corresponding path program 85 times [2021-03-10 21:44:35,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:35,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861298583] [2021-03-10 21:44:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:35,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861298583] [2021-03-10 21:44:35,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:35,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:35,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264058944] [2021-03-10 21:44:35,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:35,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:35,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:35,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:35,887 INFO L87 Difference]: Start difference. First operand 128 states and 372 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:35,964 INFO L93 Difference]: Finished difference Result 154 states and 417 transitions. [2021-03-10 21:44:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:35,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:35,965 INFO L225 Difference]: With dead ends: 154 [2021-03-10 21:44:35,965 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 21:44:35,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 21:44:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 129. [2021-03-10 21:44:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9140625) internal successors, (373), 128 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 373 transitions. [2021-03-10 21:44:35,966 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 373 transitions. Word has length 16 [2021-03-10 21:44:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:35,967 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 373 transitions. [2021-03-10 21:44:35,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 373 transitions. [2021-03-10 21:44:35,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:35,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:35,967 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:35,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable444 [2021-03-10 21:44:35,967 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:35,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:35,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1079869562, now seen corresponding path program 86 times [2021-03-10 21:44:35,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:35,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763172355] [2021-03-10 21:44:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:35,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763172355] [2021-03-10 21:44:35,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:35,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:35,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271754260] [2021-03-10 21:44:35,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:35,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:35,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:35,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:35,999 INFO L87 Difference]: Start difference. First operand 129 states and 373 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:36,097 INFO L93 Difference]: Finished difference Result 164 states and 429 transitions. [2021-03-10 21:44:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:36,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:36,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:36,098 INFO L225 Difference]: With dead ends: 164 [2021-03-10 21:44:36,098 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 21:44:36,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 21:44:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2021-03-10 21:44:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.8796992481203008) internal successors, (383), 133 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 383 transitions. [2021-03-10 21:44:36,100 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 383 transitions. Word has length 16 [2021-03-10 21:44:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:36,100 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 383 transitions. [2021-03-10 21:44:36,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 383 transitions. [2021-03-10 21:44:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:36,100 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:36,100 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:36,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445 [2021-03-10 21:44:36,100 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:36,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2117770158, now seen corresponding path program 87 times [2021-03-10 21:44:36,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:36,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314875236] [2021-03-10 21:44:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:36,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314875236] [2021-03-10 21:44:36,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:36,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:36,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589523088] [2021-03-10 21:44:36,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:36,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:36,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:36,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:36,132 INFO L87 Difference]: Start difference. First operand 134 states and 383 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:36,238 INFO L93 Difference]: Finished difference Result 151 states and 410 transitions. [2021-03-10 21:44:36,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:36,238 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:36,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:36,239 INFO L225 Difference]: With dead ends: 151 [2021-03-10 21:44:36,239 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 21:44:36,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 21:44:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 128. [2021-03-10 21:44:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.921259842519685) internal successors, (371), 127 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 371 transitions. [2021-03-10 21:44:36,240 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 371 transitions. Word has length 16 [2021-03-10 21:44:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:36,240 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 371 transitions. [2021-03-10 21:44:36,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 371 transitions. [2021-03-10 21:44:36,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:36,241 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:36,241 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:36,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446 [2021-03-10 21:44:36,241 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:36,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1586215828, now seen corresponding path program 88 times [2021-03-10 21:44:36,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:36,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947741571] [2021-03-10 21:44:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:36,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947741571] [2021-03-10 21:44:36,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:36,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:36,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121287804] [2021-03-10 21:44:36,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:36,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:36,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:36,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:36,273 INFO L87 Difference]: Start difference. First operand 128 states and 371 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:36,362 INFO L93 Difference]: Finished difference Result 147 states and 399 transitions. [2021-03-10 21:44:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:36,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:36,363 INFO L225 Difference]: With dead ends: 147 [2021-03-10 21:44:36,363 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 21:44:36,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 21:44:36,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2021-03-10 21:44:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8805970149253732) internal successors, (386), 134 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 386 transitions. [2021-03-10 21:44:36,365 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 386 transitions. Word has length 16 [2021-03-10 21:44:36,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:36,365 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 386 transitions. [2021-03-10 21:44:36,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,365 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 386 transitions. [2021-03-10 21:44:36,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:36,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:36,365 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:36,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447 [2021-03-10 21:44:36,365 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:36,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:36,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1611423892, now seen corresponding path program 89 times [2021-03-10 21:44:36,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:36,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999550965] [2021-03-10 21:44:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:36,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999550965] [2021-03-10 21:44:36,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:36,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:36,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316428150] [2021-03-10 21:44:36,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:36,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:36,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:36,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:36,405 INFO L87 Difference]: Start difference. First operand 135 states and 386 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:36,502 INFO L93 Difference]: Finished difference Result 146 states and 397 transitions. [2021-03-10 21:44:36,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:36,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:36,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:36,502 INFO L225 Difference]: With dead ends: 146 [2021-03-10 21:44:36,502 INFO L226 Difference]: Without dead ends: 143 [2021-03-10 21:44:36,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:36,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-03-10 21:44:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 134. [2021-03-10 21:44:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.8796992481203008) internal successors, (383), 133 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 383 transitions. [2021-03-10 21:44:36,504 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 383 transitions. Word has length 16 [2021-03-10 21:44:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:36,504 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 383 transitions. [2021-03-10 21:44:36,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,504 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 383 transitions. [2021-03-10 21:44:36,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:36,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:36,504 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:36,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448 [2021-03-10 21:44:36,505 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:36,505 INFO L82 PathProgramCache]: Analyzing trace with hash -534746868, now seen corresponding path program 90 times [2021-03-10 21:44:36,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:36,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843496105] [2021-03-10 21:44:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:36,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843496105] [2021-03-10 21:44:36,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:36,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:36,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702689521] [2021-03-10 21:44:36,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:36,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:36,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:36,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:36,534 INFO L87 Difference]: Start difference. First operand 134 states and 383 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:36,598 INFO L93 Difference]: Finished difference Result 133 states and 377 transitions. [2021-03-10 21:44:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:36,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:36,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:36,598 INFO L225 Difference]: With dead ends: 133 [2021-03-10 21:44:36,598 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 21:44:36,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 21:44:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-03-10 21:44:36,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.9285714285714284) internal successors, (369), 126 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 369 transitions. [2021-03-10 21:44:36,600 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 369 transitions. Word has length 16 [2021-03-10 21:44:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:36,600 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 369 transitions. [2021-03-10 21:44:36,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 369 transitions. [2021-03-10 21:44:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:36,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:36,600 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:36,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449 [2021-03-10 21:44:36,600 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:36,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:36,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1956099518, now seen corresponding path program 84 times [2021-03-10 21:44:36,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:36,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207059637] [2021-03-10 21:44:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:36,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207059637] [2021-03-10 21:44:36,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56447483] [2021-03-10 21:44:36,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:36,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:44:36,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:36,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:36,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:36,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:36,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:44:36,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855837615] [2021-03-10 21:44:36,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:44:36,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:44:36,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:44:36,692 INFO L87 Difference]: Start difference. First operand 127 states and 369 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:36,784 INFO L93 Difference]: Finished difference Result 176 states and 508 transitions. [2021-03-10 21:44:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:36,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:36,785 INFO L225 Difference]: With dead ends: 176 [2021-03-10 21:44:36,785 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 21:44:36,785 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:44:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 21:44:36,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 121. [2021-03-10 21:44:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.925) internal successors, (351), 120 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 351 transitions. [2021-03-10 21:44:36,787 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 351 transitions. Word has length 16 [2021-03-10 21:44:36,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:36,787 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 351 transitions. [2021-03-10 21:44:36,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:36,787 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 351 transitions. [2021-03-10 21:44:36,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:36,787 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:36,787 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:36,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:36,988 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:36,988 INFO L82 PathProgramCache]: Analyzing trace with hash -912267080, now seen corresponding path program 85 times [2021-03-10 21:44:36,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:36,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993139028] [2021-03-10 21:44:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:37,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993139028] [2021-03-10 21:44:37,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472535032] [2021-03-10 21:44:37,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:37,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:37,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:37,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:44:37,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309278388] [2021-03-10 21:44:37,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:44:37,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:37,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:44:37,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:44:37,105 INFO L87 Difference]: Start difference. First operand 121 states and 351 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:37,208 INFO L93 Difference]: Finished difference Result 193 states and 540 transitions. [2021-03-10 21:44:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:37,209 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:37,209 INFO L225 Difference]: With dead ends: 193 [2021-03-10 21:44:37,209 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 21:44:37,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:44:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 21:44:37,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 123. [2021-03-10 21:44:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.942622950819672) internal successors, (359), 122 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 359 transitions. [2021-03-10 21:44:37,211 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 359 transitions. Word has length 16 [2021-03-10 21:44:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:37,211 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 359 transitions. [2021-03-10 21:44:37,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 359 transitions. [2021-03-10 21:44:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:37,211 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:37,211 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:37,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:37,412 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:37,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:37,412 INFO L82 PathProgramCache]: Analyzing trace with hash 449289026, now seen corresponding path program 86 times [2021-03-10 21:44:37,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:37,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202390284] [2021-03-10 21:44:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:37,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202390284] [2021-03-10 21:44:37,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:37,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:37,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803394532] [2021-03-10 21:44:37,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:37,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:37,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:37,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:37,440 INFO L87 Difference]: Start difference. First operand 123 states and 359 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:37,535 INFO L93 Difference]: Finished difference Result 170 states and 487 transitions. [2021-03-10 21:44:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:37,536 INFO L225 Difference]: With dead ends: 170 [2021-03-10 21:44:37,536 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 21:44:37,536 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:37,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 21:44:37,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2021-03-10 21:44:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.9237288135593222) internal successors, (345), 118 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 345 transitions. [2021-03-10 21:44:37,537 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 345 transitions. Word has length 16 [2021-03-10 21:44:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:37,537 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 345 transitions. [2021-03-10 21:44:37,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 345 transitions. [2021-03-10 21:44:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:37,538 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:37,538 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:37,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452 [2021-03-10 21:44:37,538 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:37,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:37,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1418613346, now seen corresponding path program 87 times [2021-03-10 21:44:37,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:37,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483539052] [2021-03-10 21:44:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:37,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483539052] [2021-03-10 21:44:37,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261831072] [2021-03-10 21:44:37,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:37,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:37,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:37,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:44:37,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:37,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:37,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:44:37,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874495540] [2021-03-10 21:44:37,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:44:37,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:37,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:44:37,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:44:37,653 INFO L87 Difference]: Start difference. First operand 119 states and 345 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:37,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:37,761 INFO L93 Difference]: Finished difference Result 151 states and 417 transitions. [2021-03-10 21:44:37,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:37,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:37,762 INFO L225 Difference]: With dead ends: 151 [2021-03-10 21:44:37,762 INFO L226 Difference]: Without dead ends: 151 [2021-03-10 21:44:37,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:44:37,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-03-10 21:44:37,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 118. [2021-03-10 21:44:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.871794871794872) internal successors, (336), 117 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 336 transitions. [2021-03-10 21:44:37,764 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 336 transitions. Word has length 16 [2021-03-10 21:44:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:37,764 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 336 transitions. [2021-03-10 21:44:37,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:37,764 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 336 transitions. [2021-03-10 21:44:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:37,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:37,764 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:37,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-03-10 21:44:37,965 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:37,965 INFO L82 PathProgramCache]: Analyzing trace with hash -57057240, now seen corresponding path program 88 times [2021-03-10 21:44:37,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:37,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540022818] [2021-03-10 21:44:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:37,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540022818] [2021-03-10 21:44:37,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:37,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:37,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529863608] [2021-03-10 21:44:37,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:37,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:37,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:37,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:37,996 INFO L87 Difference]: Start difference. First operand 118 states and 336 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:38,125 INFO L93 Difference]: Finished difference Result 147 states and 400 transitions. [2021-03-10 21:44:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:38,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:38,126 INFO L225 Difference]: With dead ends: 147 [2021-03-10 21:44:38,126 INFO L226 Difference]: Without dead ends: 145 [2021-03-10 21:44:38,126 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-03-10 21:44:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 116. [2021-03-10 21:44:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.8521739130434782) internal successors, (328), 115 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 328 transitions. [2021-03-10 21:44:38,128 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 328 transitions. Word has length 16 [2021-03-10 21:44:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:38,128 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 328 transitions. [2021-03-10 21:44:38,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 328 transitions. [2021-03-10 21:44:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:44:38,128 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:38,129 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:38,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454 [2021-03-10 21:44:38,129 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:38,129 INFO L82 PathProgramCache]: Analyzing trace with hash -592287042, now seen corresponding path program 89 times [2021-03-10 21:44:38,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:38,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668888996] [2021-03-10 21:44:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:38,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668888996] [2021-03-10 21:44:38,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:44:38,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:44:38,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945139518] [2021-03-10 21:44:38,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:44:38,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:38,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:44:38,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:44:38,157 INFO L87 Difference]: Start difference. First operand 116 states and 328 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:38,259 INFO L93 Difference]: Finished difference Result 124 states and 350 transitions. [2021-03-10 21:44:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:44:38,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:44:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:38,260 INFO L225 Difference]: With dead ends: 124 [2021-03-10 21:44:38,260 INFO L226 Difference]: Without dead ends: 120 [2021-03-10 21:44:38,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:44:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-03-10 21:44:38,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2021-03-10 21:44:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-03-10 21:44:38,262 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-03-10 21:44:38,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:38,262 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-03-10 21:44:38,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:38,262 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-03-10 21:44:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:44:38,262 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:38,262 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:38,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable455 [2021-03-10 21:44:38,262 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:38,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:38,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1638627788, now seen corresponding path program 1 times [2021-03-10 21:44:38,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:38,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821545711] [2021-03-10 21:44:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:38,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821545711] [2021-03-10 21:44:38,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493796903] [2021-03-10 21:44:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:38,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:44:38,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:38,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:38,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:38,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:38,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:38,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:38,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:38,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:38,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:38,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:38,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:44:38,923 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:38,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:38,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:44:38,990 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:151, output treesize:113 [2021-03-10 21:44:39,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:39,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:39,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:44:39,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:39,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:39,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:39,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:39,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:39,462 INFO L628 ElimStorePlain]: treesize reduction 78, result has 57.1 percent of original size [2021-03-10 21:44:39,463 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:44:39,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:44:39,469 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:39,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:44:39,475 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:39,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:44:39,480 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:39,518 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-03-10 21:44:39,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:44:39,523 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:44:39,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:39,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:44:39,542 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:224, output treesize:32 [2021-03-10 21:44:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:39,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:39,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 21:44:39,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452389578] [2021-03-10 21:44:39,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:44:39,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:39,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:44:39,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:44:39,597 INFO L87 Difference]: Start difference. First operand 108 states and 308 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:40,130 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-03-10 21:44:40,445 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2021-03-10 21:44:40,608 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-03-10 21:44:40,933 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-03-10 21:44:41,532 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 71 [2021-03-10 21:44:41,866 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-03-10 21:44:42,119 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-03-10 21:44:42,558 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2021-03-10 21:44:43,088 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 88 [2021-03-10 21:44:43,552 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2021-03-10 21:44:43,786 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2021-03-10 21:44:44,274 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2021-03-10 21:44:44,692 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-03-10 21:44:45,164 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 81 [2021-03-10 21:44:45,605 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 88 [2021-03-10 21:44:46,091 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-03-10 21:44:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:46,182 INFO L93 Difference]: Finished difference Result 324 states and 849 transitions. [2021-03-10 21:44:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:44:46,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:44:46,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:46,183 INFO L225 Difference]: With dead ends: 324 [2021-03-10 21:44:46,183 INFO L226 Difference]: Without dead ends: 281 [2021-03-10 21:44:46,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 6539.7ms TimeCoverageRelationStatistics Valid=321, Invalid=1239, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:44:46,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-03-10 21:44:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2021-03-10 21:44:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.86144578313253) internal successors, (475), 166 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:46,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 475 transitions. [2021-03-10 21:44:46,186 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 475 transitions. Word has length 17 [2021-03-10 21:44:46,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:46,186 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 475 transitions. [2021-03-10 21:44:46,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:46,186 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 475 transitions. [2021-03-10 21:44:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:44:46,187 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:46,187 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:46,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-03-10 21:44:46,399 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:46,399 INFO L82 PathProgramCache]: Analyzing trace with hash -310438566, now seen corresponding path program 2 times [2021-03-10 21:44:46,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:46,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854888759] [2021-03-10 21:44:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:46,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854888759] [2021-03-10 21:44:46,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78714736] [2021-03-10 21:44:46,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:46,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:44:46,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:46,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:44:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:46,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:46,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:46,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:46,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:46,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:44:46,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:46,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:46,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:46,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:47,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:47,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:44:47,066 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:173, output treesize:139 [2021-03-10 21:44:47,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:47,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:44:47,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:47,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,421 INFO L628 ElimStorePlain]: treesize reduction 52, result has 67.5 percent of original size [2021-03-10 21:44:47,422 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:44:47,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:44:47,426 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:47,470 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-03-10 21:44:47,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:44:47,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:44:47,480 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:47,513 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-03-10 21:44:47,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:44:47,517 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:44:47,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:47,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:44:47,532 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:191, output treesize:32 [2021-03-10 21:44:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:47,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:47,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 21:44:47,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790163126] [2021-03-10 21:44:47,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:44:47,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:47,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:44:47,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:44:47,582 INFO L87 Difference]: Start difference. First operand 167 states and 475 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:48,386 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-03-10 21:44:48,628 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-03-10 21:44:48,896 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2021-03-10 21:44:49,176 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-03-10 21:44:49,501 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-03-10 21:44:49,988 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 92 [2021-03-10 21:44:50,119 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-03-10 21:44:50,450 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2021-03-10 21:44:50,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:50,624 INFO L93 Difference]: Finished difference Result 264 states and 736 transitions. [2021-03-10 21:44:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:44:50,625 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:44:50,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:50,625 INFO L225 Difference]: With dead ends: 264 [2021-03-10 21:44:50,625 INFO L226 Difference]: Without dead ends: 252 [2021-03-10 21:44:50,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3018.6ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:44:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-03-10 21:44:50,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 176. [2021-03-10 21:44:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9257142857142857) internal successors, (512), 175 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 512 transitions. [2021-03-10 21:44:50,628 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 512 transitions. Word has length 17 [2021-03-10 21:44:50,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:50,628 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 512 transitions. [2021-03-10 21:44:50,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 512 transitions. [2021-03-10 21:44:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:44:50,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:50,628 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:50,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-03-10 21:44:50,829 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:50,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1170799304, now seen corresponding path program 3 times [2021-03-10 21:44:50,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:50,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260252572] [2021-03-10 21:44:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:51,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260252572] [2021-03-10 21:44:51,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265268894] [2021-03-10 21:44:51,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:51,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:44:51,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:51,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:44:51,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:51,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:51,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:44:51,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:51,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:51,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:51,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:51,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:44:51,418 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:73 [2021-03-10 21:44:51,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:44:51,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:44:51,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,561 INFO L628 ElimStorePlain]: treesize reduction 38, result has 65.1 percent of original size [2021-03-10 21:44:51,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:44:51,568 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:44:51,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:51,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:44:51,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:51,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:44:51,610 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:51,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:51,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:44:51,629 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:44:51,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:51,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2021-03-10 21:44:51,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:44:51,644 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:123, output treesize:32 [2021-03-10 21:44:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:51,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:51,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-03-10 21:44:51,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376489026] [2021-03-10 21:44:51,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:44:51,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:51,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:44:51,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:44:51,692 INFO L87 Difference]: Start difference. First operand 176 states and 512 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:52,437 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-03-10 21:44:52,609 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-03-10 21:44:52,819 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2021-03-10 21:44:53,001 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-03-10 21:44:53,264 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 21:44:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:53,564 INFO L93 Difference]: Finished difference Result 283 states and 795 transitions. [2021-03-10 21:44:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:44:53,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:44:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:53,565 INFO L225 Difference]: With dead ends: 283 [2021-03-10 21:44:53,565 INFO L226 Difference]: Without dead ends: 252 [2021-03-10 21:44:53,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1841.2ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:44:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-03-10 21:44:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 180. [2021-03-10 21:44:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.916201117318436) internal successors, (522), 179 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 522 transitions. [2021-03-10 21:44:53,567 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 522 transitions. Word has length 17 [2021-03-10 21:44:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:53,567 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 522 transitions. [2021-03-10 21:44:53,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 522 transitions. [2021-03-10 21:44:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:44:53,568 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:53,568 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:53,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:53,768 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:53,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:53,768 INFO L82 PathProgramCache]: Analyzing trace with hash 227417012, now seen corresponding path program 4 times [2021-03-10 21:44:53,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:53,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858995079] [2021-03-10 21:44:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:54,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858995079] [2021-03-10 21:44:54,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080860168] [2021-03-10 21:44:54,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:54,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:44:54,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:54,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:44:54,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:54,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:44:54,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:44:54,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:54,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:54,434 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,563 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 21:44:54,563 INFO L628 ElimStorePlain]: treesize reduction 84, result has 65.0 percent of original size [2021-03-10 21:44:54,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:54,568 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:54,572 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:54,576 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,660 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-03-10 21:44:54,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:44:54,662 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 2 variables, input treesize:278, output treesize:127 [2021-03-10 21:44:54,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:44:54,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:44:54,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,883 INFO L628 ElimStorePlain]: treesize reduction 60, result has 64.1 percent of original size [2021-03-10 21:44:54,883 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:44:54,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:44:54,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:54,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:54,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:44:54,934 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:44:54,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:54,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:44:54,978 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:55,026 INFO L628 ElimStorePlain]: treesize reduction 43, result has 45.6 percent of original size [2021-03-10 21:44:55,027 INFO L518 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2021-03-10 21:44:55,027 INFO L518 ElimStorePlain]: Eliminatee v_prenex_16 vanished before elimination [2021-03-10 21:44:55,027 INFO L518 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2021-03-10 21:44:55,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:44:55,028 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:209, output treesize:32 [2021-03-10 21:44:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:55,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:55,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 21:44:55,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884616508] [2021-03-10 21:44:55,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:44:55,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:55,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:44:55,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:44:55,078 INFO L87 Difference]: Start difference. First operand 180 states and 522 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:55,557 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-03-10 21:44:55,850 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2021-03-10 21:44:56,006 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-10 21:44:56,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:56,026 INFO L93 Difference]: Finished difference Result 265 states and 737 transitions. [2021-03-10 21:44:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:44:56,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:44:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:56,027 INFO L225 Difference]: With dead ends: 265 [2021-03-10 21:44:56,027 INFO L226 Difference]: Without dead ends: 259 [2021-03-10 21:44:56,027 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1284.5ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:44:56,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-03-10 21:44:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 184. [2021-03-10 21:44:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.907103825136612) internal successors, (532), 183 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 532 transitions. [2021-03-10 21:44:56,029 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 532 transitions. Word has length 17 [2021-03-10 21:44:56,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:56,029 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 532 transitions. [2021-03-10 21:44:56,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 532 transitions. [2021-03-10 21:44:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:44:56,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:56,030 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:56,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:56,230 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:56,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:56,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1708654882, now seen corresponding path program 5 times [2021-03-10 21:44:56,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:56,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963695034] [2021-03-10 21:44:56,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:56,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963695034] [2021-03-10 21:44:56,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081511433] [2021-03-10 21:44:56,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:56,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:44:56,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:56,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:44:56,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:56,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:56,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:56,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:44:56,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:56,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:56,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:56,937 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 21:44:56,937 INFO L628 ElimStorePlain]: treesize reduction 66, result has 71.2 percent of original size [2021-03-10 21:44:56,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:56,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:56,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:56,947 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:56,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:56,952 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,065 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 21:44:57,066 INFO L628 ElimStorePlain]: treesize reduction 10, result has 93.0 percent of original size [2021-03-10 21:44:57,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:44:57,067 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:257, output treesize:132 [2021-03-10 21:44:57,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:44:57,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,330 INFO L628 ElimStorePlain]: treesize reduction 29, result has 83.4 percent of original size [2021-03-10 21:44:57,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:44:57,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,399 INFO L628 ElimStorePlain]: treesize reduction 31, result has 75.6 percent of original size [2021-03-10 21:44:57,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_20 vanished before elimination [2021-03-10 21:44:57,399 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:44:57,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:44:57,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:57,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:44:57,439 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:44:57,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:57,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:44:57,471 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,507 INFO L628 ElimStorePlain]: treesize reduction 18, result has 77.5 percent of original size [2021-03-10 21:44:57,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:57,512 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:44:57,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:57,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:44:57,533 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:57,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:57,547 INFO L518 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2021-03-10 21:44:57,547 INFO L518 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2021-03-10 21:44:57,547 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-03-10 21:44:57,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:44:57,548 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:182, output treesize:32 [2021-03-10 21:44:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:57,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:57,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:44:57,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905864093] [2021-03-10 21:44:57,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:44:57,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:57,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:44:57,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:44:57,595 INFO L87 Difference]: Start difference. First operand 184 states and 532 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:58,219 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2021-03-10 21:44:58,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:44:58,461 INFO L93 Difference]: Finished difference Result 279 states and 768 transitions. [2021-03-10 21:44:58,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:44:58,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:44:58,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:44:58,462 INFO L225 Difference]: With dead ends: 279 [2021-03-10 21:44:58,462 INFO L226 Difference]: Without dead ends: 256 [2021-03-10 21:44:58,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1190.1ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:44:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-03-10 21:44:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 182. [2021-03-10 21:44:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.911602209944751) internal successors, (527), 181 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 527 transitions. [2021-03-10 21:44:58,465 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 527 transitions. Word has length 17 [2021-03-10 21:44:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:44:58,465 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 527 transitions. [2021-03-10 21:44:58,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:44:58,465 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 527 transitions. [2021-03-10 21:44:58,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:44:58,465 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:44:58,465 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:44:58,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable522 [2021-03-10 21:44:58,666 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:44:58,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:44:58,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1137200076, now seen corresponding path program 6 times [2021-03-10 21:44:58,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:44:58,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496345813] [2021-03-10 21:44:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:44:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:44:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:58,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496345813] [2021-03-10 21:44:58,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474062046] [2021-03-10 21:44:58,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:44:59,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:44:59,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:44:59,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:44:59,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:44:59,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:59,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:44:59,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:59,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:59,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:59,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:59,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:44:59,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:59,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:44:59,209 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:139, output treesize:100 [2021-03-10 21:44:59,410 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_30], 1=[v_prenex_31, array_4]} [2021-03-10 21:44:59,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:44:59,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:44:59,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:44:59,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:44:59,438 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,572 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-03-10 21:44:59,572 INFO L628 ElimStorePlain]: treesize reduction 121, result has 57.2 percent of original size [2021-03-10 21:44:59,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:44:59,578 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:44:59,582 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:59,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:44:59,643 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:44:59,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:59,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:59,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:44:59,701 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:44:59,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:44:59,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:44:59,707 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:44:59,712 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:44:59,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:44:59,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:44:59,763 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:319, output treesize:100 [2021-03-10 21:44:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:44:59,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:44:59,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:44:59,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032361739] [2021-03-10 21:44:59,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:44:59,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:44:59,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:44:59,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:44:59,918 INFO L87 Difference]: Start difference. First operand 182 states and 527 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:00,653 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-03-10 21:45:00,813 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-03-10 21:45:01,024 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-03-10 21:45:01,263 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-03-10 21:45:01,445 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-03-10 21:45:01,723 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2021-03-10 21:45:02,044 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-03-10 21:45:02,360 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-03-10 21:45:02,734 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-03-10 21:45:03,097 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2021-03-10 21:45:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:03,220 INFO L93 Difference]: Finished difference Result 416 states and 1139 transitions. [2021-03-10 21:45:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:45:03,220 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:03,221 INFO L225 Difference]: With dead ends: 416 [2021-03-10 21:45:03,221 INFO L226 Difference]: Without dead ends: 306 [2021-03-10 21:45:03,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3238.3ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:45:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-03-10 21:45:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 211. [2021-03-10 21:45:03,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9714285714285715) internal successors, (624), 210 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 624 transitions. [2021-03-10 21:45:03,224 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 624 transitions. Word has length 17 [2021-03-10 21:45:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:03,224 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 624 transitions. [2021-03-10 21:45:03,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 624 transitions. [2021-03-10 21:45:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:03,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:03,224 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:03,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:03,425 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:03,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:03,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1264185258, now seen corresponding path program 7 times [2021-03-10 21:45:03,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:03,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071847609] [2021-03-10 21:45:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:03,715 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 21:45:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:04,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071847609] [2021-03-10 21:45:04,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473437119] [2021-03-10 21:45:04,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:04,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:45:04,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:04,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:04,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:04,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:04,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:04,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:04,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:04,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:04,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:04,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:04,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:04,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:04,182 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:66 [2021-03-10 21:45:04,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:45:04,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:04,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:45:04,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:04,388 INFO L628 ElimStorePlain]: treesize reduction 52, result has 53.6 percent of original size [2021-03-10 21:45:04,388 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:45:04,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:04,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:04,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:04,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:45:04,419 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:04,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:04,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:04,441 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:04,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:04,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:45:04,460 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:04,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:04,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:04,477 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:154, output treesize:32 [2021-03-10 21:45:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:04,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:04,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 21:45:04,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381594677] [2021-03-10 21:45:04,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:45:04,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:04,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:45:04,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:45:04,522 INFO L87 Difference]: Start difference. First operand 211 states and 624 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:04,894 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-03-10 21:45:05,187 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-03-10 21:45:05,406 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-03-10 21:45:05,719 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-03-10 21:45:05,940 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-03-10 21:45:06,195 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2021-03-10 21:45:06,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:06,301 INFO L93 Difference]: Finished difference Result 341 states and 923 transitions. [2021-03-10 21:45:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:45:06,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:06,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:06,302 INFO L225 Difference]: With dead ends: 341 [2021-03-10 21:45:06,302 INFO L226 Difference]: Without dead ends: 316 [2021-03-10 21:45:06,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2027.9ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:45:06,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-03-10 21:45:06,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 208. [2021-03-10 21:45:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9855072463768115) internal successors, (618), 207 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 618 transitions. [2021-03-10 21:45:06,306 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 618 transitions. Word has length 17 [2021-03-10 21:45:06,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:06,306 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 618 transitions. [2021-03-10 21:45:06,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:06,307 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 618 transitions. [2021-03-10 21:45:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:06,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:06,307 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:06,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2021-03-10 21:45:06,523 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:06,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:06,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1508275688, now seen corresponding path program 8 times [2021-03-10 21:45:06,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:06,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95008683] [2021-03-10 21:45:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:06,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95008683] [2021-03-10 21:45:06,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033676803] [2021-03-10 21:45:06,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:06,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:45:06,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:06,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:45:06,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:07,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:07,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:07,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:07,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:07,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:07,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:07,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:07,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:07,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:07,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:07,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:07,138 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:76 [2021-03-10 21:45:07,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:45:07,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:07,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:45:07,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:07,265 INFO L628 ElimStorePlain]: treesize reduction 52, result has 53.6 percent of original size [2021-03-10 21:45:07,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:07,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:07,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:07,287 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:45:07,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:45:07,291 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:07,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:07,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:07,312 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:07,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:07,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:45:07,332 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:07,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:07,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:07,349 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:154, output treesize:32 [2021-03-10 21:45:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:07,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:07,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 21:45:07,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41271289] [2021-03-10 21:45:07,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:45:07,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:07,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:45:07,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:45:07,396 INFO L87 Difference]: Start difference. First operand 208 states and 618 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:07,945 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 52 [2021-03-10 21:45:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:08,225 INFO L93 Difference]: Finished difference Result 298 states and 856 transitions. [2021-03-10 21:45:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:45:08,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:08,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:08,226 INFO L225 Difference]: With dead ends: 298 [2021-03-10 21:45:08,226 INFO L226 Difference]: Without dead ends: 276 [2021-03-10 21:45:08,226 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 944.3ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:45:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-03-10 21:45:08,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 220. [2021-03-10 21:45:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.9680365296803655) internal successors, (650), 219 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 650 transitions. [2021-03-10 21:45:08,229 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 650 transitions. Word has length 17 [2021-03-10 21:45:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:08,229 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 650 transitions. [2021-03-10 21:45:08,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:08,230 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 650 transitions. [2021-03-10 21:45:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:08,230 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:08,230 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:08,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-03-10 21:45:08,431 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash -27037818, now seen corresponding path program 9 times [2021-03-10 21:45:08,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:08,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528936704] [2021-03-10 21:45:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:08,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528936704] [2021-03-10 21:45:08,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272802504] [2021-03-10 21:45:08,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:08,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:45:08,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:08,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:45:08,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:09,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:09,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:09,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:09,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:09,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:09,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:09,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:09,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:09,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:09,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:09,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:09,109 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:83 [2021-03-10 21:45:09,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:45:09,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:09,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:45:09,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:09,254 INFO L628 ElimStorePlain]: treesize reduction 10, result has 87.5 percent of original size [2021-03-10 21:45:09,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:09,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:09,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:09,280 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:45:09,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:09,284 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:09,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:09,303 INFO L518 ElimStorePlain]: Eliminatee v_prenex_45 vanished before elimination [2021-03-10 21:45:09,303 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-03-10 21:45:09,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:09,304 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:118, output treesize:32 [2021-03-10 21:45:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:09,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:09,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 21:45:09,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356966387] [2021-03-10 21:45:09,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:45:09,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:09,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:45:09,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:45:09,367 INFO L87 Difference]: Start difference. First operand 220 states and 650 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:09,978 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2021-03-10 21:45:10,310 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-03-10 21:45:10,593 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-03-10 21:45:10,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:10,692 INFO L93 Difference]: Finished difference Result 308 states and 858 transitions. [2021-03-10 21:45:10,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:45:10,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:10,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:10,693 INFO L225 Difference]: With dead ends: 308 [2021-03-10 21:45:10,693 INFO L226 Difference]: Without dead ends: 268 [2021-03-10 21:45:10,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1460.7ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:45:10,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-03-10 21:45:10,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 210. [2021-03-10 21:45:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.971291866028708) internal successors, (621), 209 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 621 transitions. [2021-03-10 21:45:10,695 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 621 transitions. Word has length 17 [2021-03-10 21:45:10,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:10,695 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 621 transitions. [2021-03-10 21:45:10,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 621 transitions. [2021-03-10 21:45:10,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:10,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:10,696 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:10,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-03-10 21:45:10,896 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:10,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:10,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1496339310, now seen corresponding path program 10 times [2021-03-10 21:45:10,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:10,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82200985] [2021-03-10 21:45:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:11,200 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 21:45:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:11,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82200985] [2021-03-10 21:45:11,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810309477] [2021-03-10 21:45:11,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:11,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:45:11,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:11,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:45:11,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:11,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:11,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:11,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:11,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:11,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:11,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:11,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:11,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:11,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:11,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:45:11,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:11,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:11,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:11,595 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:151, output treesize:121 [2021-03-10 21:45:11,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:11,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:11,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:11,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:11,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:45:11,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:11,939 INFO L628 ElimStorePlain]: treesize reduction 25, result has 67.9 percent of original size [2021-03-10 21:45:11,939 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:45:11,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:45:11,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:11,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:11,962 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-03-10 21:45:11,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:11,963 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:32 [2021-03-10 21:45:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:12,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:12,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 21:45:12,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86919222] [2021-03-10 21:45:12,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:12,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:12,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:12,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:12,020 INFO L87 Difference]: Start difference. First operand 210 states and 621 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:12,425 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-03-10 21:45:12,607 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-10 21:45:12,849 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-03-10 21:45:13,175 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-10 21:45:13,312 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-03-10 21:45:13,715 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-03-10 21:45:13,975 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2021-03-10 21:45:14,349 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-03-10 21:45:14,808 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 72 [2021-03-10 21:45:15,271 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 86 [2021-03-10 21:45:15,467 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-03-10 21:45:15,866 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-03-10 21:45:16,356 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2021-03-10 21:45:16,716 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-03-10 21:45:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:16,829 INFO L93 Difference]: Finished difference Result 407 states and 1095 transitions. [2021-03-10 21:45:16,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:45:16,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:16,830 INFO L225 Difference]: With dead ends: 407 [2021-03-10 21:45:16,830 INFO L226 Difference]: Without dead ends: 321 [2021-03-10 21:45:16,831 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 4864.9ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:45:16,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-03-10 21:45:16,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 238. [2021-03-10 21:45:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.978902953586498) internal successors, (706), 237 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 706 transitions. [2021-03-10 21:45:16,834 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 706 transitions. Word has length 17 [2021-03-10 21:45:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:16,834 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 706 transitions. [2021-03-10 21:45:16,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:16,834 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 706 transitions. [2021-03-10 21:45:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:16,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:16,834 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:17,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:17,035 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:17,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:17,035 INFO L82 PathProgramCache]: Analyzing trace with hash 849561632, now seen corresponding path program 11 times [2021-03-10 21:45:17,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:17,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850438903] [2021-03-10 21:45:17,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:17,426 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 21:45:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:17,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850438903] [2021-03-10 21:45:17,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316812634] [2021-03-10 21:45:17,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:17,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:45:17,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:17,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:45:17,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:17,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:17,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:17,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:17,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:17,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:17,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:17,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:17,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:17,877 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:17,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:17,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:17,911 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:80 [2021-03-10 21:45:18,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:18,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:18,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:45:18,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:18,056 INFO L628 ElimStorePlain]: treesize reduction 47, result has 63.0 percent of original size [2021-03-10 21:45:18,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:45:18,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:18,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:18,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:18,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:18,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:18,099 INFO L518 ElimStorePlain]: Eliminatee v_prenex_52 vanished before elimination [2021-03-10 21:45:18,099 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:45:18,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:45:18,106 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:18,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:18,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:18,124 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:137, output treesize:32 [2021-03-10 21:45:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:18,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:18,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 21:45:18,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894932866] [2021-03-10 21:45:18,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:45:18,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:18,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:45:18,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:45:18,171 INFO L87 Difference]: Start difference. First operand 238 states and 706 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:18,881 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-10 21:45:19,176 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-03-10 21:45:19,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:19,311 INFO L93 Difference]: Finished difference Result 295 states and 852 transitions. [2021-03-10 21:45:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:45:19,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:19,312 INFO L225 Difference]: With dead ends: 295 [2021-03-10 21:45:19,312 INFO L226 Difference]: Without dead ends: 270 [2021-03-10 21:45:19,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1469.0ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:45:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-03-10 21:45:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 238. [2021-03-10 21:45:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.9957805907172994) internal successors, (710), 237 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 710 transitions. [2021-03-10 21:45:19,316 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 710 transitions. Word has length 17 [2021-03-10 21:45:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:19,316 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 710 transitions. [2021-03-10 21:45:19,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:19,316 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 710 transitions. [2021-03-10 21:45:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:19,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:19,317 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:19,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:19,519 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:19,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:19,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1964167794, now seen corresponding path program 12 times [2021-03-10 21:45:19,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:19,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243060125] [2021-03-10 21:45:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:19,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243060125] [2021-03-10 21:45:19,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064171348] [2021-03-10 21:45:19,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:19,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:45:19,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:19,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:45:19,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:20,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:20,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:20,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:20,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:20,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:20,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:20,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:20,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:20,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:20,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:20,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:20,117 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:73 [2021-03-10 21:45:20,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:45:20,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:20,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:45:20,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:20,244 INFO L628 ElimStorePlain]: treesize reduction 38, result has 65.1 percent of original size [2021-03-10 21:45:20,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:45:20,249 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:20,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:20,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:20,274 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:20,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:20,291 INFO L518 ElimStorePlain]: Eliminatee v_prenex_57 vanished before elimination [2021-03-10 21:45:20,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:20,296 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:20,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:20,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:45:20,316 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:20,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:20,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:20,333 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:123, output treesize:32 [2021-03-10 21:45:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:20,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:20,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-03-10 21:45:20,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593385572] [2021-03-10 21:45:20,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:45:20,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:20,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:45:20,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:45:20,382 INFO L87 Difference]: Start difference. First operand 238 states and 710 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:21,042 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-03-10 21:45:21,210 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-03-10 21:45:21,402 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-03-10 21:45:21,556 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-03-10 21:45:21,777 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2021-03-10 21:45:21,965 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-03-10 21:45:22,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:22,106 INFO L93 Difference]: Finished difference Result 290 states and 840 transitions. [2021-03-10 21:45:22,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:45:22,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:22,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:22,107 INFO L225 Difference]: With dead ends: 290 [2021-03-10 21:45:22,107 INFO L226 Difference]: Without dead ends: 260 [2021-03-10 21:45:22,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1794.6ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:45:22,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-03-10 21:45:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 230. [2021-03-10 21:45:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.017467248908297) internal successors, (691), 229 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:22,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 691 transitions. [2021-03-10 21:45:22,110 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 691 transitions. Word has length 17 [2021-03-10 21:45:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:22,110 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 691 transitions. [2021-03-10 21:45:22,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 691 transitions. [2021-03-10 21:45:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:22,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:22,110 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:22,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:22,311 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:22,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1686670984, now seen corresponding path program 13 times [2021-03-10 21:45:22,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:22,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936690348] [2021-03-10 21:45:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:22,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936690348] [2021-03-10 21:45:22,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47518933] [2021-03-10 21:45:22,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:22,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:45:22,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:22,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:22,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:22,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:22,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:22,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:22,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:22,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:22,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:22,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:23,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:23,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:23,010 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:70 [2021-03-10 21:45:23,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:23,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:23,209 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.7 percent of original size [2021-03-10 21:45:23,210 INFO L518 ElimStorePlain]: Eliminatee v_prenex_60 vanished before elimination [2021-03-10 21:45:23,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:23,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:23,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:23,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:45:23,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:23,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:23,251 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-03-10 21:45:23,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:45:23,255 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:23,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:23,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:23,272 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:137, output treesize:32 [2021-03-10 21:45:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:23,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:23,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-03-10 21:45:23,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495606842] [2021-03-10 21:45:23,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:23,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:23,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:23,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:23,320 INFO L87 Difference]: Start difference. First operand 230 states and 691 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:24,037 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-03-10 21:45:24,289 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-03-10 21:45:24,579 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-03-10 21:45:24,848 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-03-10 21:45:25,148 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-03-10 21:45:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:25,291 INFO L93 Difference]: Finished difference Result 339 states and 956 transitions. [2021-03-10 21:45:25,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:45:25,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:25,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:25,292 INFO L225 Difference]: With dead ends: 339 [2021-03-10 21:45:25,292 INFO L226 Difference]: Without dead ends: 323 [2021-03-10 21:45:25,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2037.1ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:45:25,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-03-10 21:45:25,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 227. [2021-03-10 21:45:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 3.0265486725663715) internal successors, (684), 226 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 684 transitions. [2021-03-10 21:45:25,295 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 684 transitions. Word has length 17 [2021-03-10 21:45:25,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:25,295 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 684 transitions. [2021-03-10 21:45:25,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 684 transitions. [2021-03-10 21:45:25,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:25,295 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:25,295 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:25,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-03-10 21:45:25,496 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:25,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1308901226, now seen corresponding path program 14 times [2021-03-10 21:45:25,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:25,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785742056] [2021-03-10 21:45:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:25,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785742056] [2021-03-10 21:45:25,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534072998] [2021-03-10 21:45:25,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:26,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:45:26,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:26,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:45:26,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:26,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:26,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:26,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:26,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:26,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:26,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:26,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:26,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:26,150 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:26,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:26,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:26,171 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:70 [2021-03-10 21:45:26,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:26,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:26,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:45:26,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:26,356 INFO L628 ElimStorePlain]: treesize reduction 45, result has 63.4 percent of original size [2021-03-10 21:45:26,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:45:26,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:26,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:26,383 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:45:26,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:26,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:26,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:26,404 INFO L518 ElimStorePlain]: Eliminatee v_prenex_67 vanished before elimination [2021-03-10 21:45:26,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:45:26,408 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:26,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:26,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:26,425 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:137, output treesize:32 [2021-03-10 21:45:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:26,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:26,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 21:45:26,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613706999] [2021-03-10 21:45:26,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:45:26,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:26,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:45:26,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:45:26,471 INFO L87 Difference]: Start difference. First operand 227 states and 684 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:27,049 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-03-10 21:45:27,261 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-03-10 21:45:27,530 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 63 [2021-03-10 21:45:27,733 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-03-10 21:45:27,942 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-03-10 21:45:28,152 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-03-10 21:45:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:28,270 INFO L93 Difference]: Finished difference Result 321 states and 939 transitions. [2021-03-10 21:45:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:45:28,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:28,272 INFO L225 Difference]: With dead ends: 321 [2021-03-10 21:45:28,272 INFO L226 Difference]: Without dead ends: 298 [2021-03-10 21:45:28,272 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1901.4ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:45:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-03-10 21:45:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 231. [2021-03-10 21:45:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.026086956521739) internal successors, (696), 230 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:28,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 696 transitions. [2021-03-10 21:45:28,274 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 696 transitions. Word has length 17 [2021-03-10 21:45:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:28,274 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 696 transitions. [2021-03-10 21:45:28,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 696 transitions. [2021-03-10 21:45:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:28,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:28,275 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:28,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-03-10 21:45:28,475 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:28,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2024967756, now seen corresponding path program 15 times [2021-03-10 21:45:28,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:28,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505417028] [2021-03-10 21:45:28,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:28,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505417028] [2021-03-10 21:45:28,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350087231] [2021-03-10 21:45:28,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:29,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:45:29,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:29,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:45:29,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:29,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:29,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:29,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:29,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:29,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:29,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:29,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:29,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:29,242 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:29,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:29,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:29,277 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:80 [2021-03-10 21:45:29,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:45:29,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:29,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:45:29,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:29,446 INFO L628 ElimStorePlain]: treesize reduction 31, result has 67.4 percent of original size [2021-03-10 21:45:29,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:29,452 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:29,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:29,474 INFO L518 ElimStorePlain]: Eliminatee v_prenex_70 vanished before elimination [2021-03-10 21:45:29,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:29,478 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:29,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:29,495 INFO L518 ElimStorePlain]: Eliminatee v_prenex_73 vanished before elimination [2021-03-10 21:45:29,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:45:29,499 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:29,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:29,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:29,517 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:137, output treesize:32 [2021-03-10 21:45:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:29,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:29,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 21:45:29,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659464047] [2021-03-10 21:45:29,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:45:29,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:29,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:45:29,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:45:29,562 INFO L87 Difference]: Start difference. First operand 231 states and 696 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:30,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:30,191 INFO L93 Difference]: Finished difference Result 290 states and 863 transitions. [2021-03-10 21:45:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:45:30,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:30,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:30,192 INFO L225 Difference]: With dead ends: 290 [2021-03-10 21:45:30,192 INFO L226 Difference]: Without dead ends: 280 [2021-03-10 21:45:30,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 931.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:45:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-03-10 21:45:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 233. [2021-03-10 21:45:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.0258620689655173) internal successors, (702), 232 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 702 transitions. [2021-03-10 21:45:30,195 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 702 transitions. Word has length 17 [2021-03-10 21:45:30,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:30,195 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 702 transitions. [2021-03-10 21:45:30,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:30,195 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 702 transitions. [2021-03-10 21:45:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:30,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:30,196 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:30,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-03-10 21:45:30,396 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:30,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:30,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2098340236, now seen corresponding path program 16 times [2021-03-10 21:45:30,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:30,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729493174] [2021-03-10 21:45:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:30,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729493174] [2021-03-10 21:45:30,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006881056] [2021-03-10 21:45:30,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:30,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:45:30,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:30,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:45:30,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:30,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:30,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:30,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:45:30,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:31,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:31,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:31,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:31,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:31,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:31,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:31,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:31,109 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:149, output treesize:111 [2021-03-10 21:45:31,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:31,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:31,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:31,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:31,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:45:31,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:31,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:31,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:31,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:31,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:31,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:45:31,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:31,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:31,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:45:31,256 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:31,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:31,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:45:31,262 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:31,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:31,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:31,271 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:31,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:31,277 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:31,412 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-10 21:45:31,413 INFO L628 ElimStorePlain]: treesize reduction 119, result has 52.2 percent of original size [2021-03-10 21:45:31,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:31,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:45:31,419 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:31,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:31,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:45:31,426 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:31,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:31,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:45:31,433 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:31,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:45:31,441 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:31,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:31,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:45:31,498 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:309, output treesize:94 [2021-03-10 21:45:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:31,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:31,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:45:31,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107652408] [2021-03-10 21:45:31,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:45:31,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:31,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:45:31,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:45:31,684 INFO L87 Difference]: Start difference. First operand 233 states and 702 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:32,208 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2021-03-10 21:45:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:32,335 INFO L93 Difference]: Finished difference Result 280 states and 835 transitions. [2021-03-10 21:45:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:45:32,336 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:32,337 INFO L225 Difference]: With dead ends: 280 [2021-03-10 21:45:32,337 INFO L226 Difference]: Without dead ends: 269 [2021-03-10 21:45:32,337 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 980.2ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:45:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-03-10 21:45:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 234. [2021-03-10 21:45:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.0343347639484977) internal successors, (707), 233 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 707 transitions. [2021-03-10 21:45:32,339 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 707 transitions. Word has length 17 [2021-03-10 21:45:32,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:32,339 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 707 transitions. [2021-03-10 21:45:32,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 707 transitions. [2021-03-10 21:45:32,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:32,340 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:32,340 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:32,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:32,540 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:32,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1062058060, now seen corresponding path program 17 times [2021-03-10 21:45:32,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:32,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156032085] [2021-03-10 21:45:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:32,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156032085] [2021-03-10 21:45:32,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085508256] [2021-03-10 21:45:32,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:33,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:45:33,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:45:33,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:33,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:45:33,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:33,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:33,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:33,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:33,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:33,409 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 21:45:33,410 INFO L628 ElimStorePlain]: treesize reduction 62, result has 71.0 percent of original size [2021-03-10 21:45:33,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:33,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:33,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:33,423 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:33,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:33,428 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:33,550 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 21:45:33,550 INFO L628 ElimStorePlain]: treesize reduction 10, result has 92.4 percent of original size [2021-03-10 21:45:33,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:45:33,552 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:245, output treesize:121 [2021-03-10 21:45:33,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:33,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:33,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:45:33,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:33,762 INFO L628 ElimStorePlain]: treesize reduction 75, result has 61.5 percent of original size [2021-03-10 21:45:33,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:45:33,768 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:33,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:45:33,779 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:33,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:33,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:33,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:33,871 INFO L628 ElimStorePlain]: treesize reduction 43, result has 59.0 percent of original size [2021-03-10 21:45:33,871 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:45:33,871 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:45:33,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:33,875 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:33,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:33,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-03-10 21:45:33,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:45:33,896 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:33,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:33,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:33,913 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:208, output treesize:32 [2021-03-10 21:45:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:33,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:33,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 21:45:33,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833309980] [2021-03-10 21:45:33,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:33,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:33,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:33,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:33,959 INFO L87 Difference]: Start difference. First operand 234 states and 707 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:34,482 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-10 21:45:34,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:34,547 INFO L93 Difference]: Finished difference Result 257 states and 759 transitions. [2021-03-10 21:45:34,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:45:34,548 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:34,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:34,549 INFO L225 Difference]: With dead ends: 257 [2021-03-10 21:45:34,549 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 21:45:34,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 922.5ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:45:34,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 21:45:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 240. [2021-03-10 21:45:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.0292887029288704) internal successors, (724), 239 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 724 transitions. [2021-03-10 21:45:34,551 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 724 transitions. Word has length 17 [2021-03-10 21:45:34,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:34,551 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 724 transitions. [2021-03-10 21:45:34,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:34,551 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 724 transitions. [2021-03-10 21:45:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:34,552 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:34,552 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:34,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-03-10 21:45:34,752 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:34,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:34,752 INFO L82 PathProgramCache]: Analyzing trace with hash 419179810, now seen corresponding path program 18 times [2021-03-10 21:45:34,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:34,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463853427] [2021-03-10 21:45:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:35,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463853427] [2021-03-10 21:45:35,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868655859] [2021-03-10 21:45:35,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:35,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:45:35,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:35,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:45:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:35,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:35,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:35,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:35,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:35,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:35,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:35,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:35,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:35,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:35,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:35,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:35,402 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:69 [2021-03-10 21:45:35,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:45:35,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:35,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:45:35,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:35,532 INFO L628 ElimStorePlain]: treesize reduction 59, result has 53.2 percent of original size [2021-03-10 21:45:35,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:35,537 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:35,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:35,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:35,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:35,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:35,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:45:35,583 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:35,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:35,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:45:35,606 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:35,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:35,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:45:35,631 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:35,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:35,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:35,649 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:140, output treesize:32 [2021-03-10 21:45:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:35,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:35,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-03-10 21:45:35,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400350368] [2021-03-10 21:45:35,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:45:35,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:35,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:45:35,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:45:35,701 INFO L87 Difference]: Start difference. First operand 240 states and 724 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:36,430 INFO L93 Difference]: Finished difference Result 287 states and 853 transitions. [2021-03-10 21:45:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:45:36,431 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:36,431 INFO L225 Difference]: With dead ends: 287 [2021-03-10 21:45:36,431 INFO L226 Difference]: Without dead ends: 271 [2021-03-10 21:45:36,431 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 890.7ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:45:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-03-10 21:45:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 241. [2021-03-10 21:45:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 3.0375) internal successors, (729), 240 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 729 transitions. [2021-03-10 21:45:36,434 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 729 transitions. Word has length 17 [2021-03-10 21:45:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:36,435 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 729 transitions. [2021-03-10 21:45:36,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 729 transitions. [2021-03-10 21:45:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:36,435 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:36,435 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:36,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:36,651 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:36,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:36,651 INFO L82 PathProgramCache]: Analyzing trace with hash -125995368, now seen corresponding path program 19 times [2021-03-10 21:45:36,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:36,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386621136] [2021-03-10 21:45:36,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:37,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386621136] [2021-03-10 21:45:37,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047170447] [2021-03-10 21:45:37,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:37,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:45:37,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:37,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:37,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:37,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:37,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:37,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:37,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:37,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:37,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:45:37,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:37,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:37,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:37,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:37,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:37,359 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:167, output treesize:137 [2021-03-10 21:45:37,606 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 21:45:37,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:37,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:37,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:37,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:37,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:37,787 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.4 percent of original size [2021-03-10 21:45:37,788 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:45:37,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:37,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:37,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:45:37,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:37,832 INFO L628 ElimStorePlain]: treesize reduction 20, result has 71.0 percent of original size [2021-03-10 21:45:37,832 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-03-10 21:45:37,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:45:37,841 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:37,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-03-10 21:45:37,847 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:37,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:37,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:37,870 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:123, output treesize:32 [2021-03-10 21:45:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:37,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:37,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 21:45:37,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622346431] [2021-03-10 21:45:37,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:37,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:37,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:37,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:37,917 INFO L87 Difference]: Start difference. First operand 241 states and 729 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:38,293 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-03-10 21:45:38,652 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-03-10 21:45:38,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:38,763 INFO L93 Difference]: Finished difference Result 289 states and 855 transitions. [2021-03-10 21:45:38,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:45:38,764 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:38,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:38,764 INFO L225 Difference]: With dead ends: 289 [2021-03-10 21:45:38,764 INFO L226 Difference]: Without dead ends: 279 [2021-03-10 21:45:38,764 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1296.2ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:45:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-03-10 21:45:38,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 243. [2021-03-10 21:45:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 3.0454545454545454) internal successors, (737), 242 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 737 transitions. [2021-03-10 21:45:38,767 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 737 transitions. Word has length 17 [2021-03-10 21:45:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:38,767 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 737 transitions. [2021-03-10 21:45:38,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 737 transitions. [2021-03-10 21:45:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:38,767 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:38,767 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:38,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-03-10 21:45:38,968 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:38,968 INFO L82 PathProgramCache]: Analyzing trace with hash 968096220, now seen corresponding path program 20 times [2021-03-10 21:45:38,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:38,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365614136] [2021-03-10 21:45:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:39,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365614136] [2021-03-10 21:45:39,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513004321] [2021-03-10 21:45:39,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:39,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:45:39,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:39,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:45:39,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:39,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:39,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:39,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:39,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:39,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:39,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:39,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:39,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:39,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:39,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:39,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:39,708 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:80 [2021-03-10 21:45:39,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:39,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:39,838 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.7 percent of original size [2021-03-10 21:45:39,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:39,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:39,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:39,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:45:39,865 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:39,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:39,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:45:39,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:39,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:39,909 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:45:39,909 INFO L518 ElimStorePlain]: Eliminatee v_prenex_95 vanished before elimination [2021-03-10 21:45:39,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:39,910 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:137, output treesize:32 [2021-03-10 21:45:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:39,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:39,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 21:45:39,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916447810] [2021-03-10 21:45:39,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:45:39,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:39,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:45:39,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:45:39,957 INFO L87 Difference]: Start difference. First operand 243 states and 737 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:40,479 INFO L93 Difference]: Finished difference Result 292 states and 874 transitions. [2021-03-10 21:45:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:45:40,480 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:40,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:40,480 INFO L225 Difference]: With dead ends: 292 [2021-03-10 21:45:40,480 INFO L226 Difference]: Without dead ends: 282 [2021-03-10 21:45:40,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 843.0ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:45:40,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-03-10 21:45:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 245. [2021-03-10 21:45:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.0450819672131146) internal successors, (743), 244 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 743 transitions. [2021-03-10 21:45:40,483 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 743 transitions. Word has length 17 [2021-03-10 21:45:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:40,483 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 743 transitions. [2021-03-10 21:45:40,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 743 transitions. [2021-03-10 21:45:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:40,484 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:40,484 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:40,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:40,684 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:40,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:40,684 INFO L82 PathProgramCache]: Analyzing trace with hash 153290066, now seen corresponding path program 21 times [2021-03-10 21:45:40,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:40,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531985633] [2021-03-10 21:45:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:41,006 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 21:45:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:41,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531985633] [2021-03-10 21:45:41,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589977210] [2021-03-10 21:45:41,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:41,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:45:41,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:41,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:45:41,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:41,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:41,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:41,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:41,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:41,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:41,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:41,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:41,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:41,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:41,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:41,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:41,578 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:74 [2021-03-10 21:45:41,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:45:41,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:41,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:41,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:41,734 INFO L628 ElimStorePlain]: treesize reduction 40, result has 64.6 percent of original size [2021-03-10 21:45:41,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:41,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:41,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:41,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:45:41,770 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:41,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:41,793 INFO L518 ElimStorePlain]: Eliminatee v_prenex_97 vanished before elimination [2021-03-10 21:45:41,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:41,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:41,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:41,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:45:41,825 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:41,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:41,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:41,847 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:125, output treesize:32 [2021-03-10 21:45:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:41,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:41,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-03-10 21:45:41,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295759757] [2021-03-10 21:45:41,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:41,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:41,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:41,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:41,922 INFO L87 Difference]: Start difference. First operand 245 states and 743 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:42,543 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-03-10 21:45:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:43,004 INFO L93 Difference]: Finished difference Result 303 states and 905 transitions. [2021-03-10 21:45:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:45:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:43,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:43,005 INFO L225 Difference]: With dead ends: 303 [2021-03-10 21:45:43,005 INFO L226 Difference]: Without dead ends: 288 [2021-03-10 21:45:43,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1463.2ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:45:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-03-10 21:45:43,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 253. [2021-03-10 21:45:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 3.0674603174603177) internal successors, (773), 252 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 773 transitions. [2021-03-10 21:45:43,009 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 773 transitions. Word has length 17 [2021-03-10 21:45:43,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:43,010 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 773 transitions. [2021-03-10 21:45:43,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:43,010 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 773 transitions. [2021-03-10 21:45:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:43,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:43,010 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:43,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable714 [2021-03-10 21:45:43,232 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:43,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:43,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1175189202, now seen corresponding path program 22 times [2021-03-10 21:45:43,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:43,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585380186] [2021-03-10 21:45:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:43,663 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 21:45:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:43,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585380186] [2021-03-10 21:45:43,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568286496] [2021-03-10 21:45:43,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:43,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:45:43,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:43,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:45:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:44,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:44,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:44,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:44,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:44,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:45:44,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:44,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:44,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:44,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:44,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:44,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:44,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:44,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:44,167 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:167, output treesize:136 [2021-03-10 21:45:44,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:45:44,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:44,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:45:44,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:44,471 INFO L628 ElimStorePlain]: treesize reduction 11, result has 89.7 percent of original size [2021-03-10 21:45:44,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:45:44,477 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:44,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:45:44,482 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:44,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:44,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:44,514 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:44,553 INFO L628 ElimStorePlain]: treesize reduction 14, result has 79.7 percent of original size [2021-03-10 21:45:44,553 INFO L518 ElimStorePlain]: Eliminatee v_prenex_102 vanished before elimination [2021-03-10 21:45:44,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:44,557 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:44,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:44,573 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-03-10 21:45:44,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:44,573 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:121, output treesize:32 [2021-03-10 21:45:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:44,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:44,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:45:44,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534116210] [2021-03-10 21:45:44,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:45:44,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:44,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:45:44,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:45:44,630 INFO L87 Difference]: Start difference. First operand 253 states and 773 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:45,246 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-03-10 21:45:45,640 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66 [2021-03-10 21:45:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:45,921 INFO L93 Difference]: Finished difference Result 321 states and 941 transitions. [2021-03-10 21:45:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:45:45,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:45,922 INFO L225 Difference]: With dead ends: 321 [2021-03-10 21:45:45,922 INFO L226 Difference]: Without dead ends: 281 [2021-03-10 21:45:45,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1795.8ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:45:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-03-10 21:45:45,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 256. [2021-03-10 21:45:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.070588235294118) internal successors, (783), 255 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 783 transitions. [2021-03-10 21:45:45,925 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 783 transitions. Word has length 17 [2021-03-10 21:45:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:45,925 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 783 transitions. [2021-03-10 21:45:45,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 783 transitions. [2021-03-10 21:45:45,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:45,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:45,926 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:46,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable723,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:46,126 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:46,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:46,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1517772714, now seen corresponding path program 23 times [2021-03-10 21:45:46,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:46,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650057694] [2021-03-10 21:45:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:46,471 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-10 21:45:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:46,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650057694] [2021-03-10 21:45:46,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124969124] [2021-03-10 21:45:46,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:46,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:45:46,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:46,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:45:46,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:46,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:46,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:46,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:46,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:46,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:46,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:46,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:46,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:45:46,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:46,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:46,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:46,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:46,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:46,971 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:183, output treesize:153 [2021-03-10 21:45:47,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:47,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:47,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:47,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:47,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:47,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:47,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:47,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:47,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:47,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:47,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:45:47,124 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:47,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:47,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:47,130 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:47,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:47,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:45:47,137 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:47,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:47,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:45:47,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:47,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:45:47,153 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:47,439 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-03-10 21:45:47,440 INFO L628 ElimStorePlain]: treesize reduction 151, result has 57.9 percent of original size [2021-03-10 21:45:47,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:47,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:45:47,446 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:47,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:47,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:45:47,452 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:47,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:47,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:45:47,458 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:47,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:45:47,463 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:47,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:47,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:45:47,561 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:433, output treesize:160 [2021-03-10 21:45:47,693 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:45:47,872 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 21:45:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:47,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:47,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:45:47,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619452396] [2021-03-10 21:45:47,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:45:47,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:47,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:45:47,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:45:47,986 INFO L87 Difference]: Start difference. First operand 256 states and 783 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:48,475 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2021-03-10 21:45:48,851 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-03-10 21:45:49,148 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-03-10 21:45:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:49,422 INFO L93 Difference]: Finished difference Result 316 states and 935 transitions. [2021-03-10 21:45:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:45:49,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:49,423 INFO L225 Difference]: With dead ends: 316 [2021-03-10 21:45:49,424 INFO L226 Difference]: Without dead ends: 286 [2021-03-10 21:45:49,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2129.9ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:45:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-03-10 21:45:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 261. [2021-03-10 21:45:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.080769230769231) internal successors, (801), 260 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 801 transitions. [2021-03-10 21:45:49,427 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 801 transitions. Word has length 17 [2021-03-10 21:45:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:49,427 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 801 transitions. [2021-03-10 21:45:49,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 801 transitions. [2021-03-10 21:45:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:49,427 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:49,427 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:49,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:49,628 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:49,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:49,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1096748704, now seen corresponding path program 24 times [2021-03-10 21:45:49,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:49,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851988819] [2021-03-10 21:45:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:50,031 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 21:45:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:50,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851988819] [2021-03-10 21:45:50,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000094136] [2021-03-10 21:45:50,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:50,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:45:50,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:50,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:45:50,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:50,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:50,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:50,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:50,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:50,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:45:50,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:50,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:45:50,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:50,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:50,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:50,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:50,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:50,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:50,470 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:173, output treesize:135 [2021-03-10 21:45:50,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:45:50,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:50,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:45:50,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:50,815 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-03-10 21:45:50,815 INFO L518 ElimStorePlain]: Eliminatee v_prenex_108 vanished before elimination [2021-03-10 21:45:50,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:50,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:50,865 INFO L628 ElimStorePlain]: treesize reduction 18, result has 72.3 percent of original size [2021-03-10 21:45:50,866 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:45:50,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:50,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:50,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:50,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:45:50,894 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:50,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:50,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:50,915 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:208, output treesize:32 [2021-03-10 21:45:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:50,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:50,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 21:45:50,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142170930] [2021-03-10 21:45:50,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:45:50,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:50,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:45:50,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:45:50,968 INFO L87 Difference]: Start difference. First operand 261 states and 801 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:51,965 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-03-10 21:45:52,522 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2021-03-10 21:45:52,798 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-03-10 21:45:53,119 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-03-10 21:45:53,665 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 80 [2021-03-10 21:45:54,005 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-03-10 21:45:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:54,114 INFO L93 Difference]: Finished difference Result 340 states and 1013 transitions. [2021-03-10 21:45:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:45:54,115 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:54,115 INFO L225 Difference]: With dead ends: 340 [2021-03-10 21:45:54,115 INFO L226 Difference]: Without dead ends: 328 [2021-03-10 21:45:54,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3406.9ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:45:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-03-10 21:45:54,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 270. [2021-03-10 21:45:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.096654275092937) internal successors, (833), 269 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 833 transitions. [2021-03-10 21:45:54,118 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 833 transitions. Word has length 17 [2021-03-10 21:45:54,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:54,118 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 833 transitions. [2021-03-10 21:45:54,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 833 transitions. [2021-03-10 21:45:54,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:54,119 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:54,119 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:54,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-03-10 21:45:54,319 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:54,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:54,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1716980722, now seen corresponding path program 25 times [2021-03-10 21:45:54,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:54,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33075221] [2021-03-10 21:45:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:54,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33075221] [2021-03-10 21:45:54,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486186785] [2021-03-10 21:45:54,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:54,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:45:54,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:55,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:55,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:55,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:55,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:55,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:55,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:55,114 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:55,120 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:55,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:45:55,193 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:177, output treesize:122 [2021-03-10 21:45:55,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:55,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:45:55,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,426 INFO L628 ElimStorePlain]: treesize reduction 78, result has 55.7 percent of original size [2021-03-10 21:45:55,426 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:45:55,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:45:55,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:45:55,435 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,474 INFO L628 ElimStorePlain]: treesize reduction 20, result has 75.9 percent of original size [2021-03-10 21:45:55,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:45:55,479 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:55,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:45:55,484 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:55,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:55,503 INFO L518 ElimStorePlain]: Eliminatee v_prenex_112 vanished before elimination [2021-03-10 21:45:55,503 INFO L518 ElimStorePlain]: Eliminatee v_prenex_113 vanished before elimination [2021-03-10 21:45:55,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:55,506 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:55,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:55,523 INFO L518 ElimStorePlain]: Eliminatee v_prenex_115 vanished before elimination [2021-03-10 21:45:55,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:55,524 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:206, output treesize:32 [2021-03-10 21:45:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:55,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:55,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:45:55,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789121797] [2021-03-10 21:45:55,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:45:55,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:55,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:45:55,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:45:55,584 INFO L87 Difference]: Start difference. First operand 270 states and 833 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:56,256 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-03-10 21:45:56,475 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-03-10 21:45:56,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:56,545 INFO L93 Difference]: Finished difference Result 317 states and 954 transitions. [2021-03-10 21:45:56,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:45:56,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:56,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:56,546 INFO L225 Difference]: With dead ends: 317 [2021-03-10 21:45:56,546 INFO L226 Difference]: Without dead ends: 309 [2021-03-10 21:45:56,547 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1271.1ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:45:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-03-10 21:45:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 270. [2021-03-10 21:45:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.096654275092937) internal successors, (833), 269 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:56,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 833 transitions. [2021-03-10 21:45:56,550 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 833 transitions. Word has length 17 [2021-03-10 21:45:56,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:56,550 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 833 transitions. [2021-03-10 21:45:56,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 833 transitions. [2021-03-10 21:45:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:56,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:56,550 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:56,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-03-10 21:45:56,751 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:56,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2006531768, now seen corresponding path program 26 times [2021-03-10 21:45:56,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:56,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992437365] [2021-03-10 21:45:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:45:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:57,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992437365] [2021-03-10 21:45:57,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592340300] [2021-03-10 21:45:57,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:45:57,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:45:57,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:45:57,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:45:57,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:45:57,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:57,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:57,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:45:57,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:57,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:57,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:45:57,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:57,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:45:57,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:57,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:57,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:57,358 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:99, output treesize:64 [2021-03-10 21:45:57,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:57,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:57,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:45:57,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:57,552 INFO L628 ElimStorePlain]: treesize reduction 67, result has 52.5 percent of original size [2021-03-10 21:45:57,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:45:57,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:57,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:57,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:45:57,580 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:45:57,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:57,598 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-03-10 21:45:57,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:45:57,603 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:57,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:57,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:45:57,625 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:45:57,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:45:57,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:45:57,644 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:152, output treesize:32 [2021-03-10 21:45:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:45:57,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:45:57,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-03-10 21:45:57,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019921514] [2021-03-10 21:45:57,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:45:57,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:45:57,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:45:57,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:45:57,706 INFO L87 Difference]: Start difference. First operand 270 states and 833 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:58,307 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-10 21:45:58,542 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-03-10 21:45:58,683 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 21:45:58,887 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 21:45:59,198 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-03-10 21:45:59,586 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-03-10 21:45:59,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:45:59,733 INFO L93 Difference]: Finished difference Result 447 states and 1303 transitions. [2021-03-10 21:45:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:45:59,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:45:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:45:59,735 INFO L225 Difference]: With dead ends: 447 [2021-03-10 21:45:59,735 INFO L226 Difference]: Without dead ends: 421 [2021-03-10 21:45:59,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1900.1ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:45:59,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-03-10 21:45:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 272. [2021-03-10 21:45:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.11070110701107) internal successors, (843), 271 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 843 transitions. [2021-03-10 21:45:59,739 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 843 transitions. Word has length 17 [2021-03-10 21:45:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:45:59,739 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 843 transitions. [2021-03-10 21:45:59,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:45:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 843 transitions. [2021-03-10 21:45:59,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:45:59,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:45:59,740 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:45:59,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable788 [2021-03-10 21:45:59,947 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:45:59,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:45:59,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1520655850, now seen corresponding path program 27 times [2021-03-10 21:45:59,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:45:59,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571512666] [2021-03-10 21:45:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:45:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:00,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571512666] [2021-03-10 21:46:00,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474538768] [2021-03-10 21:46:00,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:00,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:46:00,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:00,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:46:00,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:00,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:00,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:00,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:00,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:00,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:00,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:00,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:00,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:00,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:00,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:00,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:00,772 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:73 [2021-03-10 21:46:00,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:00,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:00,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:00,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:00,904 INFO L628 ElimStorePlain]: treesize reduction 38, result has 65.1 percent of original size [2021-03-10 21:46:00,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:00,909 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:00,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:00,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:46:00,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:00,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:00,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:46:00,958 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:00,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:00,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:00,981 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:00,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:00,999 INFO L518 ElimStorePlain]: Eliminatee v_prenex_125 vanished before elimination [2021-03-10 21:46:00,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:00,999 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:123, output treesize:32 [2021-03-10 21:46:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:01,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:01,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-03-10 21:46:01,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806093463] [2021-03-10 21:46:01,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:46:01,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:01,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:46:01,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:46:01,052 INFO L87 Difference]: Start difference. First operand 272 states and 843 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:01,652 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-03-10 21:46:01,809 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-03-10 21:46:02,088 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-03-10 21:46:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:02,385 INFO L93 Difference]: Finished difference Result 351 states and 1054 transitions. [2021-03-10 21:46:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:46:02,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:02,388 INFO L225 Difference]: With dead ends: 351 [2021-03-10 21:46:02,388 INFO L226 Difference]: Without dead ends: 335 [2021-03-10 21:46:02,388 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1621.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:46:02,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-03-10 21:46:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 270. [2021-03-10 21:46:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.1152416356877324) internal successors, (838), 269 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 838 transitions. [2021-03-10 21:46:02,393 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 838 transitions. Word has length 17 [2021-03-10 21:46:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:02,393 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 838 transitions. [2021-03-10 21:46:02,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 838 transitions. [2021-03-10 21:46:02,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:02,394 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:02,394 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:02,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable797,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:02,599 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:02,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1965452058, now seen corresponding path program 28 times [2021-03-10 21:46:02,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:02,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060160457] [2021-03-10 21:46:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:03,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060160457] [2021-03-10 21:46:03,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8798906] [2021-03-10 21:46:03,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:03,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:46:03,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:03,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:46:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:03,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:46:03,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:03,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:03,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:03,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:03,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:03,495 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-10 21:46:03,495 INFO L628 ElimStorePlain]: treesize reduction 62, result has 71.6 percent of original size [2021-03-10 21:46:03,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:03,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:03,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:03,506 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:03,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:03,511 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:03,624 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 21:46:03,625 INFO L628 ElimStorePlain]: treesize reduction 10, result has 92.4 percent of original size [2021-03-10 21:46:03,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:46:03,626 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:245, output treesize:121 [2021-03-10 21:46:03,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:03,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:03,845 INFO L628 ElimStorePlain]: treesize reduction 80, result has 54.5 percent of original size [2021-03-10 21:46:03,846 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:46:03,846 INFO L518 ElimStorePlain]: Eliminatee v_prenex_130 vanished before elimination [2021-03-10 21:46:03,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:46:03,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:03,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:03,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:03,901 INFO L628 ElimStorePlain]: treesize reduction 20, result has 75.3 percent of original size [2021-03-10 21:46:03,902 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:46:03,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:46:03,908 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:03,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:46:03,914 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:03,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:03,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:03,940 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:03,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:03,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:46:03,966 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:03,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:03,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:03,992 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:195, output treesize:32 [2021-03-10 21:46:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:04,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:04,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 21:46:04,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771738596] [2021-03-10 21:46:04,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:04,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:04,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:04,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:04,047 INFO L87 Difference]: Start difference. First operand 270 states and 838 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:04,407 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-03-10 21:46:04,639 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-03-10 21:46:04,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:04,711 INFO L93 Difference]: Finished difference Result 297 states and 900 transitions. [2021-03-10 21:46:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:46:04,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:04,713 INFO L225 Difference]: With dead ends: 297 [2021-03-10 21:46:04,713 INFO L226 Difference]: Without dead ends: 291 [2021-03-10 21:46:04,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1030.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:46:04,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-03-10 21:46:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 274. [2021-03-10 21:46:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.1135531135531136) internal successors, (850), 273 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 850 transitions. [2021-03-10 21:46:04,716 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 850 transitions. Word has length 17 [2021-03-10 21:46:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:04,716 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 850 transitions. [2021-03-10 21:46:04,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 850 transitions. [2021-03-10 21:46:04,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:04,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:04,716 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:04,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:04,917 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:04,917 INFO L82 PathProgramCache]: Analyzing trace with hash -848277368, now seen corresponding path program 29 times [2021-03-10 21:46:04,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:04,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304181390] [2021-03-10 21:46:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:05,356 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:46:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:05,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304181390] [2021-03-10 21:46:05,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271717486] [2021-03-10 21:46:05,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:05,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:46:05,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:05,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:46:05,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:05,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:05,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:05,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:05,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:05,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:05,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:05,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:05,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:05,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:05,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:05,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:05,677 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:73 [2021-03-10 21:46:05,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:46:05,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:05,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:46:05,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:05,855 INFO L628 ElimStorePlain]: treesize reduction 38, result has 65.1 percent of original size [2021-03-10 21:46:05,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:46:05,864 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:05,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:05,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:05,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:05,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:05,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:05,941 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:05,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:05,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:05,976 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:06,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:06,001 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-03-10 21:46:06,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:06,003 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:123, output treesize:32 [2021-03-10 21:46:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:06,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:06,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-03-10 21:46:06,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126461155] [2021-03-10 21:46:06,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:46:06,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:06,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:46:06,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:46:06,078 INFO L87 Difference]: Start difference. First operand 274 states and 850 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:06,453 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 21:46:06,643 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-03-10 21:46:06,822 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2021-03-10 21:46:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:06,932 INFO L93 Difference]: Finished difference Result 325 states and 989 transitions. [2021-03-10 21:46:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:46:06,933 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:06,933 INFO L225 Difference]: With dead ends: 325 [2021-03-10 21:46:06,933 INFO L226 Difference]: Without dead ends: 309 [2021-03-10 21:46:06,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1195.7ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:46:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-03-10 21:46:06,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 272. [2021-03-10 21:46:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.1180811808118083) internal successors, (845), 271 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 845 transitions. [2021-03-10 21:46:06,936 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 845 transitions. Word has length 17 [2021-03-10 21:46:06,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:06,936 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 845 transitions. [2021-03-10 21:46:06,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:06,937 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 845 transitions. [2021-03-10 21:46:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:06,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:06,937 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:07,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable831,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:07,137 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:07,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1393452546, now seen corresponding path program 30 times [2021-03-10 21:46:07,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:07,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466623510] [2021-03-10 21:46:07,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:07,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466623510] [2021-03-10 21:46:07,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761090066] [2021-03-10 21:46:07,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:07,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:46:07,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:07,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:46:07,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:07,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:07,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:07,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:07,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:07,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:07,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:07,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:07,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:07,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:07,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:07,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:07,923 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:76 [2021-03-10 21:46:08,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:46:08,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:08,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:46:08,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:08,081 INFO L628 ElimStorePlain]: treesize reduction 52, result has 53.6 percent of original size [2021-03-10 21:46:08,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:08,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:08,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:08,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:08,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:08,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:08,129 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:46:08,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:46:08,134 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:08,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:08,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:46:08,158 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:08,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:08,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:08,177 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:154, output treesize:32 [2021-03-10 21:46:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:08,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:08,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 21:46:08,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211839750] [2021-03-10 21:46:08,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:46:08,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:08,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:46:08,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:46:08,229 INFO L87 Difference]: Start difference. First operand 272 states and 845 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:08,797 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-03-10 21:46:09,026 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-03-10 21:46:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:09,165 INFO L93 Difference]: Finished difference Result 328 states and 991 transitions. [2021-03-10 21:46:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:46:09,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:09,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:09,166 INFO L225 Difference]: With dead ends: 328 [2021-03-10 21:46:09,166 INFO L226 Difference]: Without dead ends: 318 [2021-03-10 21:46:09,166 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1211.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:46:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-03-10 21:46:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 271. [2021-03-10 21:46:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.1148148148148147) internal successors, (841), 270 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 841 transitions. [2021-03-10 21:46:09,169 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 841 transitions. Word has length 17 [2021-03-10 21:46:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:09,169 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 841 transitions. [2021-03-10 21:46:09,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 841 transitions. [2021-03-10 21:46:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:09,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:09,170 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:09,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-03-10 21:46:09,370 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:09,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:09,370 INFO L82 PathProgramCache]: Analyzing trace with hash -299360958, now seen corresponding path program 31 times [2021-03-10 21:46:09,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:09,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463338248] [2021-03-10 21:46:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:09,611 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 21:46:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:09,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463338248] [2021-03-10 21:46:09,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316585905] [2021-03-10 21:46:09,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:09,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:46:09,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:10,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:10,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:10,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:10,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:10,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:46:10,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:10,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:10,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:10,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:10,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:10,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:10,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:10,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:10,166 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:173, output treesize:139 [2021-03-10 21:46:10,411 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 21:46:10,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:10,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:10,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:10,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:10,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:10,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:10,551 INFO L628 ElimStorePlain]: treesize reduction 48, result has 68.0 percent of original size [2021-03-10 21:46:10,552 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:46:10,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:10,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:10,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:46:10,562 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:10,607 INFO L628 ElimStorePlain]: treesize reduction 20, result has 77.5 percent of original size [2021-03-10 21:46:10,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:46:10,613 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:10,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-03-10 21:46:10,619 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:10,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:10,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:10,645 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:10,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:10,664 INFO L518 ElimStorePlain]: Eliminatee v_prenex_146 vanished before elimination [2021-03-10 21:46:10,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:10,665 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-03-10 21:46:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:10,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:10,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 21:46:10,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071844738] [2021-03-10 21:46:10,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:46:10,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:10,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:46:10,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:46:10,722 INFO L87 Difference]: Start difference. First operand 271 states and 841 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:11,083 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-10 21:46:11,466 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-03-10 21:46:11,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:11,573 INFO L93 Difference]: Finished difference Result 331 states and 1005 transitions. [2021-03-10 21:46:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:46:11,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:11,575 INFO L225 Difference]: With dead ends: 331 [2021-03-10 21:46:11,575 INFO L226 Difference]: Without dead ends: 321 [2021-03-10 21:46:11,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1384.7ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:46:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-03-10 21:46:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 273. [2021-03-10 21:46:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.113970588235294) internal successors, (847), 272 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 847 transitions. [2021-03-10 21:46:11,578 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 847 transitions. Word has length 17 [2021-03-10 21:46:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:11,578 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 847 transitions. [2021-03-10 21:46:11,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 847 transitions. [2021-03-10 21:46:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:11,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:11,579 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:11,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:11,779 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:11,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:11,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1114167112, now seen corresponding path program 32 times [2021-03-10 21:46:11,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:11,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829253986] [2021-03-10 21:46:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:12,138 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 21:46:12,292 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 21:46:12,445 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 21:46:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:12,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829253986] [2021-03-10 21:46:12,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67719311] [2021-03-10 21:46:12,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:12,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:46:12,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:12,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:46:12,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:12,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:12,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:12,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:12,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:12,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:12,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:46:12,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:12,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:12,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:13,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:13,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:13,043 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:149, output treesize:115 [2021-03-10 21:46:13,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:13,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:13,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:13,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:13,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:46:13,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:13,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:13,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:46:13,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:13,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:13,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:13,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:13,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:13,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:13,207 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:13,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:13,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:13,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:13,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:13,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:13,222 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:13,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:46:13,228 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:13,391 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 21:46:13,391 INFO L628 ElimStorePlain]: treesize reduction 113, result has 54.6 percent of original size [2021-03-10 21:46:13,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:13,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:46:13,398 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:13,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:13,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:13,407 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:13,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:13,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:46:13,413 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:13,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:46:13,419 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:13,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:13,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:46:13,483 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:317, output treesize:94 [2021-03-10 21:46:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:13,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:13,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:46:13,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060151540] [2021-03-10 21:46:13,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:46:13,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:13,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:46:13,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:46:13,671 INFO L87 Difference]: Start difference. First operand 273 states and 847 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:14,345 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-03-10 21:46:14,651 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-10 21:46:14,890 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 21:46:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:15,020 INFO L93 Difference]: Finished difference Result 338 states and 1028 transitions. [2021-03-10 21:46:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:46:15,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:15,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:15,021 INFO L225 Difference]: With dead ends: 338 [2021-03-10 21:46:15,021 INFO L226 Difference]: Without dead ends: 323 [2021-03-10 21:46:15,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2074.2ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:46:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-03-10 21:46:15,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 271. [2021-03-10 21:46:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.1148148148148147) internal successors, (841), 270 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 841 transitions. [2021-03-10 21:46:15,024 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 841 transitions. Word has length 17 [2021-03-10 21:46:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:15,025 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 841 transitions. [2021-03-10 21:46:15,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 841 transitions. [2021-03-10 21:46:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:15,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:15,025 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:15,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:15,225 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:15,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:15,226 INFO L82 PathProgramCache]: Analyzing trace with hash -92267976, now seen corresponding path program 33 times [2021-03-10 21:46:15,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:15,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140180349] [2021-03-10 21:46:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:15,694 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 21:46:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:16,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140180349] [2021-03-10 21:46:16,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120422069] [2021-03-10 21:46:16,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:16,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:46:16,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:16,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:46:16,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:16,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:16,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:16,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:16,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:16,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:46:16,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:16,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:16,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:16,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:16,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:16,227 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:16,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:16,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:16,311 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:187, output treesize:152 [2021-03-10 21:46:16,465 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_150, v_prenex_152, v_prenex_148], 1=[v_prenex_151, v_prenex_153, array_4, v_prenex_149]} [2021-03-10 21:46:16,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:16,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:16,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:16,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:16,694 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-03-10 21:46:16,695 INFO L628 ElimStorePlain]: treesize reduction 154, result has 54.6 percent of original size [2021-03-10 21:46:16,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:46:16,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:16,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:16,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:46:16,802 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:16,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:46:16,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:16,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:16,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:16,897 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:17,052 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-03-10 21:46:17,052 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.5 percent of original size [2021-03-10 21:46:17,052 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-03-10 21:46:17,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:17,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:46:17,060 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:17,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:46:17,066 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:17,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:17,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:17,150 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:17,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:17,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:46:17,231 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:17,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:17,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:46:17,315 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 8 variables, input treesize:351, output treesize:111 [2021-03-10 21:46:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:17,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:17,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:46:17,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160453856] [2021-03-10 21:46:17,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:46:17,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:17,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:46:17,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:46:17,538 INFO L87 Difference]: Start difference. First operand 271 states and 841 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:17,908 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-03-10 21:46:18,230 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-03-10 21:46:18,570 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2021-03-10 21:46:18,834 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 21:46:19,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:19,068 INFO L93 Difference]: Finished difference Result 345 states and 1027 transitions. [2021-03-10 21:46:19,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:46:19,068 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:19,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:19,069 INFO L225 Difference]: With dead ends: 345 [2021-03-10 21:46:19,069 INFO L226 Difference]: Without dead ends: 305 [2021-03-10 21:46:19,069 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2096.4ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:46:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-03-10 21:46:19,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 273. [2021-03-10 21:46:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.113970588235294) internal successors, (847), 272 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:19,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 847 transitions. [2021-03-10 21:46:19,072 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 847 transitions. Word has length 17 [2021-03-10 21:46:19,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:19,072 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 847 transitions. [2021-03-10 21:46:19,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:19,072 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 847 transitions. [2021-03-10 21:46:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:19,073 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:19,073 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:19,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-03-10 21:46:19,273 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:19,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:19,274 INFO L82 PathProgramCache]: Analyzing trace with hash 250315536, now seen corresponding path program 34 times [2021-03-10 21:46:19,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:19,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228585211] [2021-03-10 21:46:19,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:19,730 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-10 21:46:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:20,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228585211] [2021-03-10 21:46:20,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313146629] [2021-03-10 21:46:20,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:20,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:46:20,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:20,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:46:20,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:20,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:20,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:20,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:20,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:20,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:20,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:20,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:20,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:20,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:20,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:20,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:20,264 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:74 [2021-03-10 21:46:20,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:20,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:20,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:20,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:20,415 INFO L628 ElimStorePlain]: treesize reduction 39, result has 64.5 percent of original size [2021-03-10 21:46:20,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:46:20,422 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:20,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:20,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:20,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:20,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:20,472 INFO L518 ElimStorePlain]: Eliminatee v_prenex_156 vanished before elimination [2021-03-10 21:46:20,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:20,477 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:20,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:20,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:20,503 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:20,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:20,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:20,524 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:125, output treesize:32 [2021-03-10 21:46:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:20,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:20,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 21:46:20,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156692849] [2021-03-10 21:46:20,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:46:20,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:20,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:46:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:46:20,591 INFO L87 Difference]: Start difference. First operand 273 states and 847 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:21,320 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-03-10 21:46:21,487 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 21:46:21,679 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-03-10 21:46:21,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:21,816 INFO L93 Difference]: Finished difference Result 317 states and 969 transitions. [2021-03-10 21:46:21,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:46:21,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:21,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:21,817 INFO L225 Difference]: With dead ends: 317 [2021-03-10 21:46:21,817 INFO L226 Difference]: Without dead ends: 306 [2021-03-10 21:46:21,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1601.5ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:46:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-03-10 21:46:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 273. [2021-03-10 21:46:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.113970588235294) internal successors, (847), 272 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 847 transitions. [2021-03-10 21:46:21,820 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 847 transitions. Word has length 17 [2021-03-10 21:46:21,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:21,821 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 847 transitions. [2021-03-10 21:46:21,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 847 transitions. [2021-03-10 21:46:21,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:21,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:21,821 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:22,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable897 [2021-03-10 21:46:22,022 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:22,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:22,022 INFO L82 PathProgramCache]: Analyzing trace with hash -326980856, now seen corresponding path program 35 times [2021-03-10 21:46:22,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:22,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052911958] [2021-03-10 21:46:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:22,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052911958] [2021-03-10 21:46:22,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291428693] [2021-03-10 21:46:22,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:22,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:46:22,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:22,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:46:22,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:22,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:22,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:22,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:22,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:22,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:22,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:22,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:22,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:22,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:22,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:46:22,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:22,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:22,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:22,743 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:139, output treesize:104 [2021-03-10 21:46:22,966 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_159], 1=[v_prenex_160, array_4]} [2021-03-10 21:46:22,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:22,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:22,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:46:22,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:22,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:22,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:22,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:46:22,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:23,180 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-03-10 21:46:23,181 INFO L628 ElimStorePlain]: treesize reduction 137, result has 53.2 percent of original size [2021-03-10 21:46:23,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:46:23,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:23,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:46:23,205 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:23,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:23,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:46:23,291 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:23,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:23,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:23,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:23,377 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:23,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:23,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:23,385 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:23,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:46:23,392 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:23,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:23,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:46:23,461 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:327, output treesize:100 [2021-03-10 21:46:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:23,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:23,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:46:23,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050584313] [2021-03-10 21:46:23,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:46:23,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:23,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:46:23,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:46:23,671 INFO L87 Difference]: Start difference. First operand 273 states and 847 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:24,168 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 21:46:24,432 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-03-10 21:46:24,636 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 21:46:24,893 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2021-03-10 21:46:25,284 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-03-10 21:46:25,669 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-03-10 21:46:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:25,812 INFO L93 Difference]: Finished difference Result 378 states and 1137 transitions. [2021-03-10 21:46:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:46:25,813 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:25,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:25,813 INFO L225 Difference]: With dead ends: 378 [2021-03-10 21:46:25,813 INFO L226 Difference]: Without dead ends: 362 [2021-03-10 21:46:25,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2460.4ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:46:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-03-10 21:46:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 275. [2021-03-10 21:46:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.113138686131387) internal successors, (853), 274 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 853 transitions. [2021-03-10 21:46:25,817 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 853 transitions. Word has length 17 [2021-03-10 21:46:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:25,817 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 853 transitions. [2021-03-10 21:46:25,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 853 transitions. [2021-03-10 21:46:25,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:25,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:25,817 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:26,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable906 [2021-03-10 21:46:26,018 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:26,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:26,018 INFO L82 PathProgramCache]: Analyzing trace with hash 947967822, now seen corresponding path program 36 times [2021-03-10 21:46:26,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:26,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967378057] [2021-03-10 21:46:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:26,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967378057] [2021-03-10 21:46:26,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072051201] [2021-03-10 21:46:26,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:26,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:46:26,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:26,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:46:26,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:26,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:46:26,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:26,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:26,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:26,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:26,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:26,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:26,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:26,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:26,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:26,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:26,907 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:150, output treesize:111 [2021-03-10 21:46:27,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:27,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:46:27,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:27,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:27,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:27,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:27,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:27,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:46:27,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:27,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:27,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:27,098 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:27,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:27,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:27,107 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:27,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:27,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:27,116 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:27,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:27,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:27,125 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:27,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:27,134 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:27,300 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 21:46:27,301 INFO L628 ElimStorePlain]: treesize reduction 108, result has 54.6 percent of original size [2021-03-10 21:46:27,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:27,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:46:27,308 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:27,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:27,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:46:27,316 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:27,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:27,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:27,323 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:27,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:27,330 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:27,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:27,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:46:27,399 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:309, output treesize:97 [2021-03-10 21:46:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:27,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:27,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 21:46:27,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267153168] [2021-03-10 21:46:27,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:46:27,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:27,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:46:27,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:46:27,594 INFO L87 Difference]: Start difference. First operand 275 states and 853 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:28,319 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-03-10 21:46:28,591 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-03-10 21:46:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:28,769 INFO L93 Difference]: Finished difference Result 334 states and 1017 transitions. [2021-03-10 21:46:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:46:28,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:28,770 INFO L225 Difference]: With dead ends: 334 [2021-03-10 21:46:28,770 INFO L226 Difference]: Without dead ends: 320 [2021-03-10 21:46:28,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1529.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:46:28,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-03-10 21:46:28,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 277. [2021-03-10 21:46:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.11231884057971) internal successors, (859), 276 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 859 transitions. [2021-03-10 21:46:28,773 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 859 transitions. Word has length 17 [2021-03-10 21:46:28,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:28,774 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 859 transitions. [2021-03-10 21:46:28,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:28,774 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 859 transitions. [2021-03-10 21:46:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:28,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:28,774 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:28,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-03-10 21:46:28,974 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:28,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1290551334, now seen corresponding path program 37 times [2021-03-10 21:46:28,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:28,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069598942] [2021-03-10 21:46:28,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:29,520 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-10 21:46:29,652 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 21:46:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:29,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069598942] [2021-03-10 21:46:29,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403308243] [2021-03-10 21:46:29,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:29,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:46:29,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:30,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:30,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:30,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:30,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:30,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:30,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:30,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:30,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:30,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:30,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:30,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:30,141 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:74 [2021-03-10 21:46:30,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:30,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:30,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:30,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:30,346 INFO L628 ElimStorePlain]: treesize reduction 39, result has 65.5 percent of original size [2021-03-10 21:46:30,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:46:30,354 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:30,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:30,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:30,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:30,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:30,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_164 vanished before elimination [2021-03-10 21:46:30,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:30,417 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:30,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:30,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:30,445 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:30,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:30,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:30,468 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:125, output treesize:32 [2021-03-10 21:46:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:30,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:30,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 21:46:30,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742713007] [2021-03-10 21:46:30,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:46:30,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:30,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:46:30,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:46:30,541 INFO L87 Difference]: Start difference. First operand 277 states and 859 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:31,138 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-03-10 21:46:31,488 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2021-03-10 21:46:31,662 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 21:46:31,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:31,958 INFO L93 Difference]: Finished difference Result 328 states and 1001 transitions. [2021-03-10 21:46:31,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:46:31,959 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:31,959 INFO L225 Difference]: With dead ends: 328 [2021-03-10 21:46:31,959 INFO L226 Difference]: Without dead ends: 317 [2021-03-10 21:46:31,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1875.5ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:46:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-03-10 21:46:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 276. [2021-03-10 21:46:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1163636363636362) internal successors, (857), 275 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 857 transitions. [2021-03-10 21:46:31,962 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 857 transitions. Word has length 17 [2021-03-10 21:46:31,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:31,962 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 857 transitions. [2021-03-10 21:46:31,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 857 transitions. [2021-03-10 21:46:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:31,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:31,963 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:32,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:32,163 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:32,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:32,164 INFO L82 PathProgramCache]: Analyzing trace with hash -2132806164, now seen corresponding path program 38 times [2021-03-10 21:46:32,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:32,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222849515] [2021-03-10 21:46:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:32,543 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 21:46:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:32,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222849515] [2021-03-10 21:46:32,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032248811] [2021-03-10 21:46:32,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:32,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:46:32,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:32,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:46:32,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:33,113 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:46:33,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:33,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:33,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:33,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:33,456 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:46:33,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:33,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:33,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:33,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:33,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:33,636 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:46:33,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:33,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:33,645 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:33,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:33,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:33,653 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:33,758 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:46:33,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:33,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-03-10 21:46:33,765 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:267, output treesize:219 [2021-03-10 21:46:33,953 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 21:46:34,443 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_180, v_prenex_182, array_2, v_prenex_174, v_prenex_176, v_prenex_178], 1=[v_prenex_181, v_prenex_183, v_prenex_175, array_4, v_prenex_177, v_prenex_179]} [2021-03-10 21:46:34,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:46:34,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:34,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:46:34,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:34,859 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 95 [2021-03-10 21:46:34,860 INFO L628 ElimStorePlain]: treesize reduction 208, result has 51.9 percent of original size [2021-03-10 21:46:34,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:34,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:34,982 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-10 21:46:34,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:34,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:34,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:35,102 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 21:46:35,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:35,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:46:35,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:35,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:35,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:46:35,216 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:35,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:35,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:35,319 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:35,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:35,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:35,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:35,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:46:35,429 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:35,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:35,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:35,438 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:35,547 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 21:46:35,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:35,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:35,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:46:35,557 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:35,661 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 21:46:35,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:35,662 INFO L518 ElimStorePlain]: Eliminatee v_prenex_175 vanished before elimination [2021-03-10 21:46:35,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:35,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:35,671 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:35,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:35,765 INFO L518 ElimStorePlain]: Eliminatee v_prenex_177 vanished before elimination [2021-03-10 21:46:35,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:35,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:35,775 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:35,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:35,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:46:35,869 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:451, output treesize:67 [2021-03-10 21:46:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:35,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:35,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-10 21:46:35,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631567508] [2021-03-10 21:46:35,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:46:35,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:35,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:46:35,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:46:35,972 INFO L87 Difference]: Start difference. First operand 276 states and 857 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:36,225 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-10 21:46:36,561 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-03-10 21:46:36,763 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-03-10 21:46:37,145 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 95 [2021-03-10 21:46:37,455 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-03-10 21:46:38,364 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 135 [2021-03-10 21:46:38,886 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 105 [2021-03-10 21:46:38,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:38,970 INFO L93 Difference]: Finished difference Result 354 states and 1041 transitions. [2021-03-10 21:46:38,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:46:38,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:38,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:38,972 INFO L225 Difference]: With dead ends: 354 [2021-03-10 21:46:38,972 INFO L226 Difference]: Without dead ends: 340 [2021-03-10 21:46:38,972 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3615.1ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:46:38,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-03-10 21:46:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 279. [2021-03-10 21:46:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.1079136690647484) internal successors, (864), 278 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 864 transitions. [2021-03-10 21:46:38,976 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 864 transitions. Word has length 17 [2021-03-10 21:46:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:38,976 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 864 transitions. [2021-03-10 21:46:38,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 864 transitions. [2021-03-10 21:46:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:38,976 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:38,976 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:39,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable946 [2021-03-10 21:46:39,177 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash 213094778, now seen corresponding path program 39 times [2021-03-10 21:46:39,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:39,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319537732] [2021-03-10 21:46:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:39,613 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 21:46:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:39,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319537732] [2021-03-10 21:46:39,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998245507] [2021-03-10 21:46:39,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:39,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:46:39,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:39,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:46:39,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:40,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:40,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:40,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:40,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:40,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:40,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:46:40,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:40,225 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 21:46:40,226 INFO L628 ElimStorePlain]: treesize reduction 10, result has 92.1 percent of original size [2021-03-10 21:46:40,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:40,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:40,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:40,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:40,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:40,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:40,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:40,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:40,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:46:40,300 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:147, output treesize:103 [2021-03-10 21:46:40,576 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_190, v_prenex_192, array_2, v_prenex_188], 1=[v_prenex_191, v_prenex_193, array_4, v_prenex_189]} [2021-03-10 21:46:40,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:40,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:40,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:40,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:40,786 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-03-10 21:46:40,786 INFO L628 ElimStorePlain]: treesize reduction 89, result has 61.1 percent of original size [2021-03-10 21:46:40,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:46:40,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:40,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:40,803 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:40,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:40,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:40,875 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:40,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:40,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:40,945 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:41,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:41,005 INFO L518 ElimStorePlain]: Eliminatee v_prenex_191 vanished before elimination [2021-03-10 21:46:41,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:41,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:41,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:46:41,015 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:41,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:41,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-03-10 21:46:41,024 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:41,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:41,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:41,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:46:41,088 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:41,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:41,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:41,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:41,154 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:41,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:41,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:46:41,212 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:243, output treesize:48 [2021-03-10 21:46:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:41,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:41,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:46:41,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185106745] [2021-03-10 21:46:41,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:46:41,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:41,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:46:41,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:46:41,310 INFO L87 Difference]: Start difference. First operand 279 states and 864 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:41,975 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-10 21:46:42,119 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-03-10 21:46:42,353 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2021-03-10 21:46:42,630 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-10 21:46:42,941 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-03-10 21:46:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:43,158 INFO L93 Difference]: Finished difference Result 345 states and 1039 transitions. [2021-03-10 21:46:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:46:43,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:43,159 INFO L225 Difference]: With dead ends: 345 [2021-03-10 21:46:43,160 INFO L226 Difference]: Without dead ends: 326 [2021-03-10 21:46:43,160 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2144.5ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:46:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-03-10 21:46:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2021-03-10 21:46:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.1035714285714286) internal successors, (869), 280 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 869 transitions. [2021-03-10 21:46:43,163 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 869 transitions. Word has length 17 [2021-03-10 21:46:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:43,163 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 869 transitions. [2021-03-10 21:46:43,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 869 transitions. [2021-03-10 21:46:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:43,163 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:43,163 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:43,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable989,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:43,364 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:43,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:43,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1694332648, now seen corresponding path program 40 times [2021-03-10 21:46:43,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:43,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820495116] [2021-03-10 21:46:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:43,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820495116] [2021-03-10 21:46:43,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590426893] [2021-03-10 21:46:43,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:43,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:46:43,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:43,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:46:43,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:44,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:44,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:44,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:44,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:44,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:44,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:44,268 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:44,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:44,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:46:44,368 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:205, output treesize:150 [2021-03-10 21:46:44,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:44,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:46:44,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:44,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:44,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,882 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-03-10 21:46:44,882 INFO L628 ElimStorePlain]: treesize reduction 203, result has 41.5 percent of original size [2021-03-10 21:46:44,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:46:44,891 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:44,901 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:44,909 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:44,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:46:44,991 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:44,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:44,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:45,000 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:45,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:45,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:46:45,009 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:45,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:45,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:45,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:46:45,090 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:45,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:45,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:46:45,157 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:375, output treesize:62 [2021-03-10 21:46:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:45,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:45,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:46:45,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127956199] [2021-03-10 21:46:45,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:46:45,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:45,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:46:45,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:46:45,287 INFO L87 Difference]: Start difference. First operand 281 states and 869 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:45,697 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 21:46:46,089 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-03-10 21:46:46,313 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-03-10 21:46:46,846 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2021-03-10 21:46:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:46,937 INFO L93 Difference]: Finished difference Result 320 states and 963 transitions. [2021-03-10 21:46:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:46:46,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:46,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:46,939 INFO L225 Difference]: With dead ends: 320 [2021-03-10 21:46:46,939 INFO L226 Difference]: Without dead ends: 313 [2021-03-10 21:46:46,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1970.9ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:46:46,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-03-10 21:46:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 287. [2021-03-10 21:46:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.0839160839160837) internal successors, (882), 286 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 882 transitions. [2021-03-10 21:46:46,942 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 882 transitions. Word has length 17 [2021-03-10 21:46:46,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:46,942 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 882 transitions. [2021-03-10 21:46:46,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:46,943 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 882 transitions. [2021-03-10 21:46:46,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:46,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:46,943 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:47,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1019 [2021-03-10 21:46:47,143 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:47,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:47,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1115333512, now seen corresponding path program 41 times [2021-03-10 21:46:47,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:47,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571681145] [2021-03-10 21:46:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:47,464 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 21:46:47,636 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-10 21:46:47,799 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 21:46:47,930 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 21:46:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:48,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571681145] [2021-03-10 21:46:48,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142618700] [2021-03-10 21:46:48,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:48,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:46:48,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:48,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:46:48,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:48,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:48,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:48,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:48,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:48,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:48,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:48,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:48,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:48,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:48,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:48,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:48,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:48,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:48,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:48,455 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:48,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:48,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:46:48,528 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:130, output treesize:94 [2021-03-10 21:46:48,980 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_206, array_2, v_prenex_202, v_prenex_204], 1=[v_prenex_207, array_4, v_prenex_203, v_prenex_205]} [2021-03-10 21:46:48,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:48,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:48,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:48,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:49,165 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-03-10 21:46:49,166 INFO L628 ElimStorePlain]: treesize reduction 85, result has 62.2 percent of original size [2021-03-10 21:46:49,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:49,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:49,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:49,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:49,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:49,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:46:49,258 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:49,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:49,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:46:49,341 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:49,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:49,398 INFO L518 ElimStorePlain]: Eliminatee v_prenex_207 vanished before elimination [2021-03-10 21:46:49,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:49,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:46:49,405 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:49,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:49,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:49,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:49,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:49,472 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:49,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:49,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:46:49,481 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:49,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:49,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:49,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:46:49,543 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:49,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:49,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:46:49,599 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:243, output treesize:48 [2021-03-10 21:46:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:49,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:49,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:46:49,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657330032] [2021-03-10 21:46:49,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:46:49,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:49,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:46:49,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:46:49,703 INFO L87 Difference]: Start difference. First operand 287 states and 882 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:50,016 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-10 21:46:50,472 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-03-10 21:46:50,691 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-03-10 21:46:51,135 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2021-03-10 21:46:51,849 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2021-03-10 21:46:52,683 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 92 [2021-03-10 21:46:53,214 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-03-10 21:46:53,756 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2021-03-10 21:46:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:53,934 INFO L93 Difference]: Finished difference Result 437 states and 1272 transitions. [2021-03-10 21:46:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:46:53,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:53,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:53,936 INFO L225 Difference]: With dead ends: 437 [2021-03-10 21:46:53,936 INFO L226 Difference]: Without dead ends: 417 [2021-03-10 21:46:53,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 4563.2ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:46:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-03-10 21:46:53,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 287. [2021-03-10 21:46:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.0839160839160837) internal successors, (882), 286 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 882 transitions. [2021-03-10 21:46:53,939 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 882 transitions. Word has length 17 [2021-03-10 21:46:53,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:53,940 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 882 transitions. [2021-03-10 21:46:53,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 882 transitions. [2021-03-10 21:46:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:53,940 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:53,940 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:54,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:54,140 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:54,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:54,141 INFO L82 PathProgramCache]: Analyzing trace with hash 668511236, now seen corresponding path program 42 times [2021-03-10 21:46:54,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:54,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252185355] [2021-03-10 21:46:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:54,580 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-10 21:46:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:54,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252185355] [2021-03-10 21:46:54,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277076818] [2021-03-10 21:46:54,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:54,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:46:54,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:46:54,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:46:54,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:55,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:55,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:55,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:55,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:55,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:55,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:55,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:55,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:55,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:55,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:55,143 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:55,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:55,152 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:55,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:55,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:46:55,236 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:212, output treesize:161 [2021-03-10 21:46:55,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:55,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:55,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:46:55,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:55,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:55,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:46:55,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:55,996 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 94 [2021-03-10 21:46:55,996 INFO L628 ElimStorePlain]: treesize reduction 200, result has 50.4 percent of original size [2021-03-10 21:46:56,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:56,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:56,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:46:56,008 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:56,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:56,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:46:56,018 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:56,122 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-10 21:46:56,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:56,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:56,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:56,131 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:56,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:56,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:46:56,240 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:56,347 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 21:46:56,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:56,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:56,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:46:56,358 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:56,473 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 21:46:56,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:56,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:56,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:56,483 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:56,589 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 21:46:56,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:56,590 INFO L518 ElimStorePlain]: Eliminatee v_prenex_210 vanished before elimination [2021-03-10 21:46:56,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:56,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:56,600 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:56,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:56,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:56,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:56,708 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:56,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:56,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:56,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:46:56,815 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:46:56,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:56,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:46:56,917 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:57,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:57,007 INFO L518 ElimStorePlain]: Eliminatee v_prenex_216 vanished before elimination [2021-03-10 21:46:57,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 21:46:57,011 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:417, output treesize:75 [2021-03-10 21:46:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:57,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:46:57,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:46:57,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697009312] [2021-03-10 21:46:57,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:46:57,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:46:57,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:46:57,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:46:57,117 INFO L87 Difference]: Start difference. First operand 287 states and 882 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:57,590 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-10 21:46:58,035 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2021-03-10 21:46:58,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:46:58,101 INFO L93 Difference]: Finished difference Result 324 states and 971 transitions. [2021-03-10 21:46:58,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:46:58,102 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:46:58,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:46:58,103 INFO L225 Difference]: With dead ends: 324 [2021-03-10 21:46:58,103 INFO L226 Difference]: Without dead ends: 317 [2021-03-10 21:46:58,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1551.3ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:46:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-03-10 21:46:58,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 285. [2021-03-10 21:46:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0880281690140845) internal successors, (877), 284 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 877 transitions. [2021-03-10 21:46:58,107 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 877 transitions. Word has length 17 [2021-03-10 21:46:58,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:46:58,107 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 877 transitions. [2021-03-10 21:46:58,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:46:58,107 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 877 transitions. [2021-03-10 21:46:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:46:58,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:46:58,108 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:46:58,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:58,323 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:46:58,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:46:58,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1857754136, now seen corresponding path program 43 times [2021-03-10 21:46:58,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:46:58,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85389385] [2021-03-10 21:46:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:46:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:58,780 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-10 21:46:58,931 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-10 21:46:59,066 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 21:46:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:46:59,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85389385] [2021-03-10 21:46:59,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786937272] [2021-03-10 21:46:59,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:46:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:46:59,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:46:59,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:46:59,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:59,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:59,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:59,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:59,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:59,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:59,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:46:59,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:59,497 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:46:59,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:46:59,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:46:59,499 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:219, output treesize:180 [2021-03-10 21:46:59,643 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:46:59,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:46:59,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:59,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:46:59,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:59,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:59,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:59,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:46:59,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:59,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:46:59,743 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:59,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:46:59,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:59,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:59,762 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:46:59,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:46:59,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:46:59,770 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:00,108 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 21:47:00,108 INFO L628 ElimStorePlain]: treesize reduction 160, result has 58.8 percent of original size [2021-03-10 21:47:00,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:47:00,117 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:00,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:47:00,125 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:00,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:47:00,133 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:00,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:00,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:47:00,140 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:00,279 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:47:00,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:00,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:47:00,282 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:443, output treesize:177 [2021-03-10 21:47:00,451 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:47:00,830 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 21:47:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:01,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:01,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 21:47:01,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432581906] [2021-03-10 21:47:01,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:01,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:01,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:01,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:01,001 INFO L87 Difference]: Start difference. First operand 285 states and 877 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:01,612 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-03-10 21:47:01,820 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-03-10 21:47:02,318 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2021-03-10 21:47:02,515 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 21:47:02,737 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 21:47:03,321 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-10 21:47:03,811 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-03-10 21:47:04,258 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-03-10 21:47:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:04,313 INFO L93 Difference]: Finished difference Result 368 states and 1081 transitions. [2021-03-10 21:47:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:47:04,314 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:47:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:04,315 INFO L225 Difference]: With dead ends: 368 [2021-03-10 21:47:04,315 INFO L226 Difference]: Without dead ends: 345 [2021-03-10 21:47:04,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 4163.2ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:47:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-03-10 21:47:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 291. [2021-03-10 21:47:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.103448275862069) internal successors, (900), 290 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 900 transitions. [2021-03-10 21:47:04,318 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 900 transitions. Word has length 17 [2021-03-10 21:47:04,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:04,318 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 900 transitions. [2021-03-10 21:47:04,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:04,318 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 900 transitions. [2021-03-10 21:47:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:04,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:04,319 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:04,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-03-10 21:47:04,519 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:04,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:04,520 INFO L82 PathProgramCache]: Analyzing trace with hash 672434372, now seen corresponding path program 44 times [2021-03-10 21:47:04,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:04,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205915386] [2021-03-10 21:47:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:05,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205915386] [2021-03-10 21:47:05,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690139094] [2021-03-10 21:47:05,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:05,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:47:05,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:05,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:47:05,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:05,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:05,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:05,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:05,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:05,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:05,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:05,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:05,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:05,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:05,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:05,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:05,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:05,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:05,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:05,398 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:05,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:05,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:47:05,453 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:130, output treesize:104 [2021-03-10 21:47:05,912 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_228, array_2, v_prenex_230, v_prenex_232], 1=[v_prenex_229, array_4, v_prenex_231, v_prenex_233]} [2021-03-10 21:47:05,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:05,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:05,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:05,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:06,161 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-03-10 21:47:06,162 INFO L628 ElimStorePlain]: treesize reduction 89, result has 63.7 percent of original size [2021-03-10 21:47:06,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:47:06,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:06,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:47:06,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:06,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:06,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:06,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:06,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:06,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:06,336 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:06,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:06,404 INFO L518 ElimStorePlain]: Eliminatee v_prenex_229 vanished before elimination [2021-03-10 21:47:06,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:06,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:06,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:47:06,415 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:06,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:06,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:47:06,426 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:06,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:06,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:06,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:47:06,503 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:06,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:06,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:06,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:47:06,576 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:06,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:06,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:47:06,644 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:263, output treesize:48 [2021-03-10 21:47:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:06,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:06,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:47:06,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477234816] [2021-03-10 21:47:06,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:47:06,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:06,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:47:06,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:47:06,759 INFO L87 Difference]: Start difference. First operand 291 states and 900 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:07,302 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 21:47:07,509 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2021-03-10 21:47:07,860 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-03-10 21:47:08,238 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2021-03-10 21:47:08,745 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 88 [2021-03-10 21:47:09,157 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2021-03-10 21:47:09,520 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-03-10 21:47:09,872 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2021-03-10 21:47:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:10,108 INFO L93 Difference]: Finished difference Result 386 states and 1154 transitions. [2021-03-10 21:47:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:47:10,109 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:47:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:10,110 INFO L225 Difference]: With dead ends: 386 [2021-03-10 21:47:10,110 INFO L226 Difference]: Without dead ends: 363 [2021-03-10 21:47:10,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 3199.6ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:47:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-03-10 21:47:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 295. [2021-03-10 21:47:10,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.1020408163265305) internal successors, (912), 294 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 912 transitions. [2021-03-10 21:47:10,114 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 912 transitions. Word has length 17 [2021-03-10 21:47:10,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:10,114 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 912 transitions. [2021-03-10 21:47:10,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:10,114 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 912 transitions. [2021-03-10 21:47:10,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:10,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:10,114 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:10,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:10,315 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:10,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1633532686, now seen corresponding path program 45 times [2021-03-10 21:47:10,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:10,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636145024] [2021-03-10 21:47:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:10,619 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 21:47:10,737 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 21:47:10,859 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 21:47:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:11,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636145024] [2021-03-10 21:47:11,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918188869] [2021-03-10 21:47:11,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:11,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:47:11,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:11,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:47:11,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:11,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:11,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:11,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:11,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:11,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:11,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:11,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:11,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:11,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:11,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:11,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:11,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:11,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:11,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:11,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:11,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:11,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:47:11,491 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:139, output treesize:109 [2021-03-10 21:47:11,799 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_239, array_2, v_prenex_241, v_prenex_243], 1=[v_prenex_240, array_4, v_prenex_242, v_prenex_244]} [2021-03-10 21:47:11,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:47:11,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:11,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:47:11,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:12,002 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-03-10 21:47:12,003 INFO L628 ElimStorePlain]: treesize reduction 112, result has 47.7 percent of original size [2021-03-10 21:47:12,003 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:12,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:47:12,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:12,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:12,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:12,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:12,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:12,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:12,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:47:12,155 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:12,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:12,214 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:47:12,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:12,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:47:12,225 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:12,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:12,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:12,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:47:12,303 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:12,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:12,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:47:12,365 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:235, output treesize:38 [2021-03-10 21:47:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:12,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:12,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:47:12,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887063459] [2021-03-10 21:47:12,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:47:12,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:12,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:47:12,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:47:12,462 INFO L87 Difference]: Start difference. First operand 295 states and 912 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:12,765 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 21:47:13,200 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-03-10 21:47:13,576 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-03-10 21:47:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:13,848 INFO L93 Difference]: Finished difference Result 355 states and 1078 transitions. [2021-03-10 21:47:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:47:13,849 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:47:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:13,850 INFO L225 Difference]: With dead ends: 355 [2021-03-10 21:47:13,850 INFO L226 Difference]: Without dead ends: 345 [2021-03-10 21:47:13,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1746.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:47:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-03-10 21:47:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 297. [2021-03-10 21:47:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.1013513513513513) internal successors, (918), 296 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 918 transitions. [2021-03-10 21:47:13,853 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 918 transitions. Word has length 17 [2021-03-10 21:47:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:13,853 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 918 transitions. [2021-03-10 21:47:13,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 918 transitions. [2021-03-10 21:47:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:13,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:13,854 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:14,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1187 [2021-03-10 21:47:14,055 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:14,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1560160206, now seen corresponding path program 46 times [2021-03-10 21:47:14,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:14,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472195953] [2021-03-10 21:47:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:14,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472195953] [2021-03-10 21:47:14,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429670971] [2021-03-10 21:47:14,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:14,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:47:14,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:14,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:47:14,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:14,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:14,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:14,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:14,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:14,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:14,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:47:14,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,100 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:47:15,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:15,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:15,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:15,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:15,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:47:15,219 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:192, output treesize:162 [2021-03-10 21:47:15,448 INFO L446 ElimStorePlain]: Different costs {1=[array_2], 10=[array_0]} [2021-03-10 21:47:15,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:47:15,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:15,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:15,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:47:15,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:47:15,497 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:15,507 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:47:15,516 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:15,526 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,818 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-03-10 21:47:15,819 INFO L628 ElimStorePlain]: treesize reduction 142, result has 58.1 percent of original size [2021-03-10 21:47:15,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:47:15,828 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:47:15,838 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:47:15,847 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:15,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:47:15,855 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:15,963 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:47:15,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:15,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:47:15,967 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:411, output treesize:101 [2021-03-10 21:47:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:16,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:16,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:47:16,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187479630] [2021-03-10 21:47:16,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:47:16,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:16,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:47:16,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:47:16,207 INFO L87 Difference]: Start difference. First operand 297 states and 918 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:16,815 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-03-10 21:47:17,388 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 91 [2021-03-10 21:47:17,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:17,652 INFO L93 Difference]: Finished difference Result 345 states and 1050 transitions. [2021-03-10 21:47:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:47:17,653 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:47:17,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:17,654 INFO L225 Difference]: With dead ends: 345 [2021-03-10 21:47:17,654 INFO L226 Difference]: Without dead ends: 334 [2021-03-10 21:47:17,654 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1797.2ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:47:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-03-10 21:47:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 291. [2021-03-10 21:47:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.103448275862069) internal successors, (900), 290 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 900 transitions. [2021-03-10 21:47:17,658 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 900 transitions. Word has length 17 [2021-03-10 21:47:17,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:17,658 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 900 transitions. [2021-03-10 21:47:17,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 900 transitions. [2021-03-10 21:47:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:17,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:17,658 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:17,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1212 [2021-03-10 21:47:17,859 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:17,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:17,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1698524914, now seen corresponding path program 47 times [2021-03-10 21:47:17,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:17,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692831614] [2021-03-10 21:47:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:18,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692831614] [2021-03-10 21:47:18,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880389453] [2021-03-10 21:47:18,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:18,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:47:18,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:18,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:47:18,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:18,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:18,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:18,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:18,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:18,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:18,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:18,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:18,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:18,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:18,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:18,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:18,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:18,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:18,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:18,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:18,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:18,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:47:18,995 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:139, output treesize:109 [2021-03-10 21:47:19,279 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_254, v_prenex_256, v_prenex_258], 1=[array_4, v_prenex_255, v_prenex_257, v_prenex_259]} [2021-03-10 21:47:19,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:19,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:19,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:47:19,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:19,529 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-03-10 21:47:19,530 INFO L628 ElimStorePlain]: treesize reduction 91, result has 62.9 percent of original size [2021-03-10 21:47:19,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:47:19,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:19,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:19,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:19,641 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:19,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:19,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:47:19,739 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:19,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:47:19,747 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:19,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:19,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:19,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:47:19,831 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:19,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:19,901 INFO L518 ElimStorePlain]: Eliminatee v_prenex_255 vanished before elimination [2021-03-10 21:47:19,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:19,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:47:19,909 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:19,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:19,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:19,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:19,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:47:19,989 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:19,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:19,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:47:19,997 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:20,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:20,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:47:20,067 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:255, output treesize:48 [2021-03-10 21:47:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:20,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:20,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:47:20,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656331713] [2021-03-10 21:47:20,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:47:20,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:20,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:47:20,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:47:20,180 INFO L87 Difference]: Start difference. First operand 291 states and 900 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:20,711 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 21:47:20,938 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-03-10 21:47:21,286 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-03-10 21:47:21,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:21,537 INFO L93 Difference]: Finished difference Result 344 states and 1043 transitions. [2021-03-10 21:47:21,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:47:21,538 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:47:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:21,539 INFO L225 Difference]: With dead ends: 344 [2021-03-10 21:47:21,539 INFO L226 Difference]: Without dead ends: 334 [2021-03-10 21:47:21,539 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1620.6ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:47:21,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-03-10 21:47:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 293. [2021-03-10 21:47:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.106164383561644) internal successors, (907), 292 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 907 transitions. [2021-03-10 21:47:21,542 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 907 transitions. Word has length 17 [2021-03-10 21:47:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:21,542 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 907 transitions. [2021-03-10 21:47:21,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 907 transitions. [2021-03-10 21:47:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:21,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:21,543 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:21,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1236 [2021-03-10 21:47:21,743 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:21,744 INFO L82 PathProgramCache]: Analyzing trace with hash -217287044, now seen corresponding path program 48 times [2021-03-10 21:47:21,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:21,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015442347] [2021-03-10 21:47:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:22,243 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:47:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:22,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015442347] [2021-03-10 21:47:22,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214711934] [2021-03-10 21:47:22,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:22,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:47:22,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:22,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:47:22,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:22,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:22,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:22,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:22,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:22,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:22,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:22,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:22,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:22,663 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:22,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:22,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:47:22,722 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:127, output treesize:96 [2021-03-10 21:47:22,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:22,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:22,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:22,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:22,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:22,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:22,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:47:22,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:22,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:22,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:22,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:47:22,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:22,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:22,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:22,971 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:23,128 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-03-10 21:47:23,128 INFO L628 ElimStorePlain]: treesize reduction 124, result has 43.6 percent of original size [2021-03-10 21:47:23,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:23,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:47:23,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:23,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:23,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:23,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:47:23,197 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:23,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:23,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:23,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:23,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:47:23,261 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:23,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:23,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:47:23,268 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:23,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:23,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:47:23,319 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:257, output treesize:38 [2021-03-10 21:47:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:23,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:23,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:47:23,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371765026] [2021-03-10 21:47:23,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:47:23,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:23,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:47:23,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:47:23,406 INFO L87 Difference]: Start difference. First operand 293 states and 907 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:23,900 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-03-10 21:47:24,197 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-03-10 21:47:24,470 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 21:47:24,704 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-03-10 21:47:24,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:24,886 INFO L93 Difference]: Finished difference Result 342 states and 1039 transitions. [2021-03-10 21:47:24,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:47:24,887 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:47:24,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:24,888 INFO L225 Difference]: With dead ends: 342 [2021-03-10 21:47:24,888 INFO L226 Difference]: Without dead ends: 332 [2021-03-10 21:47:24,888 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1822.9ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:47:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-03-10 21:47:24,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 297. [2021-03-10 21:47:24,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.108108108108108) internal successors, (920), 296 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 920 transitions. [2021-03-10 21:47:24,891 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 920 transitions. Word has length 17 [2021-03-10 21:47:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:24,891 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 920 transitions. [2021-03-10 21:47:24,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 920 transitions. [2021-03-10 21:47:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:24,892 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:24,892 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:25,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1269 [2021-03-10 21:47:25,092 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:25,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:25,093 INFO L82 PathProgramCache]: Analyzing trace with hash 331629366, now seen corresponding path program 49 times [2021-03-10 21:47:25,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:25,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57029808] [2021-03-10 21:47:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:25,388 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 21:47:25,542 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:47:25,671 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 21:47:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:25,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57029808] [2021-03-10 21:47:25,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085075726] [2021-03-10 21:47:25,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:25,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:47:25,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:26,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:26,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:26,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:26,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:26,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:26,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:26,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:47:26,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:26,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:26,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:26,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:26,120 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:26,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:26,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:26,129 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:26,268 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 21:47:26,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:26,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:47:26,274 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:221, output treesize:183 [2021-03-10 21:47:26,434 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 21:47:26,650 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 21:47:27,144 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_280, v_prenex_282, array_2, v_prenex_273, v_prenex_276, v_prenex_278], 1=[v_prenex_281, v_prenex_283, array_4, v_prenex_274, v_prenex_277, v_prenex_279]} [2021-03-10 21:47:27,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:47:27,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:27,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:47:27,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:27,553 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 90 [2021-03-10 21:47:27,554 INFO L628 ElimStorePlain]: treesize reduction 206, result has 49.6 percent of original size [2021-03-10 21:47:27,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:47:27,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:27,689 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 21:47:27,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:27,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:47:27,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:27,830 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-10 21:47:27,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:27,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:47:27,840 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:27,957 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 21:47:27,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:27,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:47:27,966 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:28,082 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 21:47:28,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:28,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:47:28,091 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:28,199 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 21:47:28,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:28,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:28,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:28,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:47:28,212 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:28,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:28,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:47:28,221 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:28,333 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 21:47:28,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:28,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:28,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:47:28,344 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:28,455 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 21:47:28,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:28,456 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:47:28,456 INFO L518 ElimStorePlain]: Eliminatee v_prenex_274 vanished before elimination [2021-03-10 21:47:28,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:28,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:47:28,467 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:28,575 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 21:47:28,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:28,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:28,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:47:28,586 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:28,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:28,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:47:28,691 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:423, output treesize:73 [2021-03-10 21:47:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:28,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:28,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-10 21:47:28,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640833055] [2021-03-10 21:47:28,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:47:28,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:28,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:47:28,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:47:28,832 INFO L87 Difference]: Start difference. First operand 297 states and 920 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:29,327 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 21:47:29,734 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2021-03-10 21:47:30,497 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 106 [2021-03-10 21:47:30,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:30,717 INFO L93 Difference]: Finished difference Result 350 states and 1065 transitions. [2021-03-10 21:47:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:47:30,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:47:30,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:30,718 INFO L225 Difference]: With dead ends: 350 [2021-03-10 21:47:30,718 INFO L226 Difference]: Without dead ends: 340 [2021-03-10 21:47:30,719 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2700.3ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:47:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-03-10 21:47:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 299. [2021-03-10 21:47:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.1073825503355703) internal successors, (926), 298 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 926 transitions. [2021-03-10 21:47:30,722 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 926 transitions. Word has length 17 [2021-03-10 21:47:30,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:30,722 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 926 transitions. [2021-03-10 21:47:30,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 926 transitions. [2021-03-10 21:47:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:30,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:30,722 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:30,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1282,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:30,923 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:30,923 INFO L82 PathProgramCache]: Analyzing trace with hash -483176788, now seen corresponding path program 50 times [2021-03-10 21:47:30,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:30,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653427315] [2021-03-10 21:47:30,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:31,341 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 21:47:31,499 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 21:47:31,659 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 21:47:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:31,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653427315] [2021-03-10 21:47:31,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840064453] [2021-03-10 21:47:31,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:31,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:47:31,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:31,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:47:31,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:32,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:32,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:32,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:32,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:32,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:32,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:47:32,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:32,452 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:47:32,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:32,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:32,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:32,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:32,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:32,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:32,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:32,470 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:32,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:32,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:47:32,571 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:192, output treesize:154 [2021-03-10 21:47:32,809 INFO L446 ElimStorePlain]: Different costs {1=[array_2], 10=[array_0]} [2021-03-10 21:47:32,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:32,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:32,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:32,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:32,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:32,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:32,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:32,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:47:32,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:32,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:32,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:32,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:32,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:32,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:32,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:32,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:32,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:32,870 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:32,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:32,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:47:32,880 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:32,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:32,888 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:33,212 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-03-10 21:47:33,213 INFO L628 ElimStorePlain]: treesize reduction 144, result has 56.2 percent of original size [2021-03-10 21:47:33,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:33,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:33,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:47:33,222 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:33,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:33,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:33,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:47:33,232 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:33,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:33,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:33,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:47:33,244 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:33,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:33,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:47:33,254 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:33,369 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 21:47:33,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:33,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:47:33,373 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:395, output treesize:101 [2021-03-10 21:47:33,525 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:47:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:33,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:33,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-10 21:47:33,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360332899] [2021-03-10 21:47:33,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:47:33,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:33,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:47:33,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:47:33,690 INFO L87 Difference]: Start difference. First operand 299 states and 926 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:34,252 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-03-10 21:47:34,716 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2021-03-10 21:47:35,071 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-03-10 21:47:35,503 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-10 21:47:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:35,767 INFO L93 Difference]: Finished difference Result 361 states and 1096 transitions. [2021-03-10 21:47:35,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:47:35,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:47:35,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:35,769 INFO L225 Difference]: With dead ends: 361 [2021-03-10 21:47:35,769 INFO L226 Difference]: Without dead ends: 346 [2021-03-10 21:47:35,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2779.3ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:47:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-03-10 21:47:35,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 297. [2021-03-10 21:47:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.108108108108108) internal successors, (920), 296 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:35,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 920 transitions. [2021-03-10 21:47:35,772 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 920 transitions. Word has length 17 [2021-03-10 21:47:35,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:35,772 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 920 transitions. [2021-03-10 21:47:35,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:35,772 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 920 transitions. [2021-03-10 21:47:35,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:35,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:35,773 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:35,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1319 [2021-03-10 21:47:35,973 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash 538722348, now seen corresponding path program 51 times [2021-03-10 21:47:35,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:35,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884210305] [2021-03-10 21:47:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:36,292 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-10 21:47:36,528 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 21:47:36,649 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 21:47:36,778 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 21:47:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:36,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884210305] [2021-03-10 21:47:36,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968341880] [2021-03-10 21:47:36,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:37,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:47:37,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:37,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:47:37,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:37,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:37,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:37,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:47:37,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:37,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,462 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:47:37,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:37,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:47:37,465 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:251, output treesize:216 [2021-03-10 21:47:37,669 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:47:37,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:37,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:37,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:37,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:47:37,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:47:37,786 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:37,797 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:47:37,809 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:37,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:37,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:37,818 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:38,287 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-03-10 21:47:38,288 INFO L628 ElimStorePlain]: treesize reduction 185, result has 57.6 percent of original size [2021-03-10 21:47:38,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:38,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:38,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:47:38,299 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:38,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:38,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:38,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:47:38,309 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:38,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:38,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:38,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:47:38,318 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:38,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:38,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:47:38,329 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:38,524 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:47:38,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:38,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:47:38,527 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:507, output treesize:212 [2021-03-10 21:47:38,796 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:47:39,429 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-03-10 21:47:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:39,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:39,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:47:39,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099323792] [2021-03-10 21:47:39,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:47:39,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:39,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:47:39,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:47:39,656 INFO L87 Difference]: Start difference. First operand 297 states and 920 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:40,589 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-03-10 21:47:41,723 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2021-03-10 21:47:42,326 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-03-10 21:47:43,307 WARN L205 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-03-10 21:47:44,373 WARN L205 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-03-10 21:47:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:44,620 INFO L93 Difference]: Finished difference Result 370 states and 1109 transitions. [2021-03-10 21:47:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:47:44,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:47:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:44,622 INFO L225 Difference]: With dead ends: 370 [2021-03-10 21:47:44,622 INFO L226 Difference]: Without dead ends: 325 [2021-03-10 21:47:44,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 6268.2ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:47:44,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-03-10 21:47:44,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 304. [2021-03-10 21:47:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.1155115511551155) internal successors, (944), 303 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 944 transitions. [2021-03-10 21:47:44,626 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 944 transitions. Word has length 17 [2021-03-10 21:47:44,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:44,626 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 944 transitions. [2021-03-10 21:47:44,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:44,626 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 944 transitions. [2021-03-10 21:47:44,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:44,626 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:44,626 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:44,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1343 [2021-03-10 21:47:44,827 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:44,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:44,827 INFO L82 PathProgramCache]: Analyzing trace with hash 881305860, now seen corresponding path program 52 times [2021-03-10 21:47:44,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:44,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495464824] [2021-03-10 21:47:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:45,171 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 21:47:45,366 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-10 21:47:45,535 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 21:47:45,695 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-10 21:47:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:45,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495464824] [2021-03-10 21:47:45,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687043822] [2021-03-10 21:47:45,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:45,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:47:45,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:45,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:47:45,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:46,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:46,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:46,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:47:46,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:46,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:46,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:46,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:46,337 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:47:46,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:46,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:46,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:46,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:46,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:46,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:46,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:46,360 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:46,478 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:47:46,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:46,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:47:46,489 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:183, output treesize:145 [2021-03-10 21:47:46,818 INFO L446 ElimStorePlain]: Different costs {1=[array_2], 10=[array_0]} [2021-03-10 21:47:46,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:46,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:46,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:46,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:46,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:46,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:46,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:46,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:46,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:46,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:46,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:46,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:46,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:46,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:46,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:46,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:46,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:47:46,900 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:46,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:46,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:47:46,913 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:46,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:47:46,925 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:47,359 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-03-10 21:47:47,360 INFO L628 ElimStorePlain]: treesize reduction 129, result has 58.5 percent of original size [2021-03-10 21:47:47,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:47,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:47,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:47:47,373 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:47,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:47,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:47,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:47:47,385 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:47,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:47,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:47,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:47:47,396 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:47,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:47,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:47:47,409 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:47,548 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:47:47,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:47,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:47:47,553 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:377, output treesize:101 [2021-03-10 21:47:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:47,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:47,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-10 21:47:47,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399764510] [2021-03-10 21:47:47,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:47:47,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:47,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:47:47,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:47:47,867 INFO L87 Difference]: Start difference. First operand 304 states and 944 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:48,438 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-10 21:47:49,037 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 86 [2021-03-10 21:47:49,436 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-03-10 21:47:49,919 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-03-10 21:47:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:50,164 INFO L93 Difference]: Finished difference Result 345 states and 1055 transitions. [2021-03-10 21:47:50,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:47:50,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:47:50,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:50,167 INFO L225 Difference]: With dead ends: 345 [2021-03-10 21:47:50,167 INFO L226 Difference]: Without dead ends: 334 [2021-03-10 21:47:50,167 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2981.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:47:50,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-03-10 21:47:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 303. [2021-03-10 21:47:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.119205298013245) internal successors, (942), 302 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:50,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 942 transitions. [2021-03-10 21:47:50,171 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 942 transitions. Word has length 17 [2021-03-10 21:47:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:50,171 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 942 transitions. [2021-03-10 21:47:50,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 942 transitions. [2021-03-10 21:47:50,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:50,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:50,171 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:50,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1358 [2021-03-10 21:47:50,372 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:50,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:50,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1017508532, now seen corresponding path program 53 times [2021-03-10 21:47:50,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:50,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208870671] [2021-03-10 21:47:50,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:50,717 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 21:47:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:51,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208870671] [2021-03-10 21:47:51,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124303208] [2021-03-10 21:47:51,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:51,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:47:51,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:51,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:47:51,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:51,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:51,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:51,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:51,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:51,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:51,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:51,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:51,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:51,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:51,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:51,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:51,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:51,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:51,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:51,518 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:51,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:51,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:47:51,604 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:131, output treesize:95 [2021-03-10 21:47:52,196 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_298, v_prenex_300, v_prenex_302], 1=[array_4, v_prenex_299, v_prenex_301, v_prenex_303]} [2021-03-10 21:47:52,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:52,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:52,461 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-03-10 21:47:52,462 INFO L628 ElimStorePlain]: treesize reduction 113, result has 47.7 percent of original size [2021-03-10 21:47:52,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:47:52,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:52,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:52,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:52,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:52,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:52,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:47:52,648 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:52,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:52,716 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:47:52,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:52,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:47:52,727 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:52,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:52,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:52,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:47:52,806 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:52,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:52,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:52,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:47:52,886 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:52,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:52,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:47:52,955 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:223, output treesize:38 [2021-03-10 21:47:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:53,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:53,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:47:53,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022569862] [2021-03-10 21:47:53,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:47:53,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:53,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:47:53,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:47:53,062 INFO L87 Difference]: Start difference. First operand 303 states and 942 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:53,391 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 21:47:53,780 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-03-10 21:47:54,586 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-03-10 21:47:54,778 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 21:47:55,271 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-03-10 21:47:55,836 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-03-10 21:47:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:47:55,837 INFO L93 Difference]: Finished difference Result 486 states and 1442 transitions. [2021-03-10 21:47:55,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:47:55,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:47:55,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:47:55,838 INFO L225 Difference]: With dead ends: 486 [2021-03-10 21:47:55,838 INFO L226 Difference]: Without dead ends: 466 [2021-03-10 21:47:55,838 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 3048.2ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:47:55,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-03-10 21:47:55,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 327. [2021-03-10 21:47:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.1196319018404908) internal successors, (1017), 326 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:55,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 1017 transitions. [2021-03-10 21:47:55,843 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 1017 transitions. Word has length 17 [2021-03-10 21:47:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:47:55,843 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 1017 transitions. [2021-03-10 21:47:55,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 1017 transitions. [2021-03-10 21:47:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:47:55,843 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:47:55,843 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:47:56,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-03-10 21:47:56,044 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:47:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:47:56,044 INFO L82 PathProgramCache]: Analyzing trace with hash -56410218, now seen corresponding path program 54 times [2021-03-10 21:47:56,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:47:56,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965074922] [2021-03-10 21:47:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:47:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:47:56,356 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-03-10 21:47:56,575 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 21:47:56,709 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 21:47:56,940 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 21:47:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:57,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965074922] [2021-03-10 21:47:57,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362884750] [2021-03-10 21:47:57,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:47:57,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:47:57,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:47:57,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:47:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:47:57,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:57,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:57,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:57,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:57,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:57,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:57,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:57,724 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:47:57,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:57,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:57,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:57,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:57,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:57,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:57,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:47:57,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:57,850 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:47:57,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:57,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:47:57,861 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:139, output treesize:109 [2021-03-10 21:47:58,479 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_308, array_2, v_prenex_310, v_prenex_312], 1=[v_prenex_309, array_4, v_prenex_311, v_prenex_313]} [2021-03-10 21:47:58,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:47:58,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:58,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:47:58,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:58,877 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-03-10 21:47:58,878 INFO L628 ElimStorePlain]: treesize reduction 115, result has 47.2 percent of original size [2021-03-10 21:47:58,878 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:47:58,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:47:58,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:58,995 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:47:58,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:59,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:47:59,008 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:59,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:59,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:59,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:47:59,116 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:59,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:59,209 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:47:59,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:59,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:47:59,228 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:47:59,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:59,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:47:59,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:47:59,336 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:47:59,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:47:59,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:47:59,439 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:235, output treesize:38 [2021-03-10 21:47:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:47:59,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:47:59,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:47:59,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074371575] [2021-03-10 21:47:59,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:47:59,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:47:59,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:47:59,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:47:59,616 INFO L87 Difference]: Start difference. First operand 327 states and 1017 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:47:59,949 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 21:48:00,570 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-03-10 21:48:01,129 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 21:48:01,646 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2021-03-10 21:48:02,407 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 96 [2021-03-10 21:48:02,683 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 21:48:03,551 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 96 [2021-03-10 21:48:03,961 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-10 21:48:04,432 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-10 21:48:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:04,674 INFO L93 Difference]: Finished difference Result 487 states and 1456 transitions. [2021-03-10 21:48:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:48:04,676 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:48:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:04,676 INFO L225 Difference]: With dead ends: 487 [2021-03-10 21:48:04,676 INFO L226 Difference]: Without dead ends: 473 [2021-03-10 21:48:04,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 5029.0ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:48:04,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-03-10 21:48:04,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 350. [2021-03-10 21:48:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.157593123209169) internal successors, (1102), 349 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:04,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1102 transitions. [2021-03-10 21:48:04,681 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1102 transitions. Word has length 17 [2021-03-10 21:48:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:04,681 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1102 transitions. [2021-03-10 21:48:04,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1102 transitions. [2021-03-10 21:48:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:04,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:04,682 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:04,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-03-10 21:48:04,882 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:04,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:04,883 INFO L82 PathProgramCache]: Analyzing trace with hash -129782698, now seen corresponding path program 55 times [2021-03-10 21:48:04,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:04,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888456583] [2021-03-10 21:48:04,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:05,154 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-10 21:48:05,317 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 21:48:05,554 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 21:48:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:05,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888456583] [2021-03-10 21:48:05,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570353254] [2021-03-10 21:48:05,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:05,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:48:05,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:06,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:06,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:06,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:06,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:06,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:06,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:48:06,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:06,550 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:48:06,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:06,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:06,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:06,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:06,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:06,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:06,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:06,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:06,694 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:48:06,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:06,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:48:06,702 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:192, output treesize:158 [2021-03-10 21:48:07,011 INFO L446 ElimStorePlain]: Different costs {1=[array_2], 10=[array_0]} [2021-03-10 21:48:07,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:07,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:07,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:48:07,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:07,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:07,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:07,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:48:07,057 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:07,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:07,069 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:07,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:07,082 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:07,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:48:07,093 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:07,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:48:07,104 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:07,543 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-03-10 21:48:07,544 INFO L628 ElimStorePlain]: treesize reduction 148, result has 56.3 percent of original size [2021-03-10 21:48:07,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:48:07,556 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:07,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:48:07,568 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:07,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:48:07,582 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:07,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:07,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:48:07,593 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:07,744 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 21:48:07,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:07,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:48:07,749 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:403, output treesize:101 [2021-03-10 21:48:07,912 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:48:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:08,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:08,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:48:08,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71080332] [2021-03-10 21:48:08,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:48:08,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:08,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:48:08,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:48:08,096 INFO L87 Difference]: Start difference. First operand 350 states and 1102 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:08,692 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-03-10 21:48:09,441 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2021-03-10 21:48:10,584 WARN L205 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 96 [2021-03-10 21:48:11,080 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-03-10 21:48:11,386 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-10 21:48:11,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:11,542 INFO L93 Difference]: Finished difference Result 446 states and 1359 transitions. [2021-03-10 21:48:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:48:11,545 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:48:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:11,546 INFO L225 Difference]: With dead ends: 446 [2021-03-10 21:48:11,546 INFO L226 Difference]: Without dead ends: 435 [2021-03-10 21:48:11,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3983.9ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:48:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-03-10 21:48:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 351. [2021-03-10 21:48:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.162857142857143) internal successors, (1107), 350 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1107 transitions. [2021-03-10 21:48:11,550 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1107 transitions. Word has length 17 [2021-03-10 21:48:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:11,550 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 1107 transitions. [2021-03-10 21:48:11,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1107 transitions. [2021-03-10 21:48:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:11,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:11,551 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:11,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1436,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:11,752 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:11,752 INFO L82 PathProgramCache]: Analyzing trace with hash -28866952, now seen corresponding path program 56 times [2021-03-10 21:48:11,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:11,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402450862] [2021-03-10 21:48:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:12,198 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 21:48:12,325 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-10 21:48:12,451 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 21:48:12,578 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 21:48:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:12,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402450862] [2021-03-10 21:48:12,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570478116] [2021-03-10 21:48:12,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:12,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:48:12,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:12,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:48:12,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:12,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-03-10 21:48:12,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:12,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:48:12,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:12,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:12,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:12,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2021-03-10 21:48:12,949 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:12,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-03-10 21:48:12,959 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:12,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-03-10 21:48:12,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:12,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:48:12,977 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:13,152 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 21:48:13,153 INFO L628 ElimStorePlain]: treesize reduction 119, result has 48.7 percent of original size [2021-03-10 21:48:13,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:48:13,155 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:283, output treesize:113 [2021-03-10 21:48:13,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-03-10 21:48:13,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:13,461 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 21:48:13,462 INFO L628 ElimStorePlain]: treesize reduction 57, result has 58.4 percent of original size [2021-03-10 21:48:13,462 INFO L518 ElimStorePlain]: Eliminatee v_prenex_319 vanished before elimination [2021-03-10 21:48:13,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:48:13,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:13,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:13,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:48:13,534 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:13,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:13,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:48:13,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:13,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:13,647 INFO L518 ElimStorePlain]: Eliminatee v_prenex_321 vanished before elimination [2021-03-10 21:48:13,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:48:13,649 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:162, output treesize:44 [2021-03-10 21:48:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:13,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:13,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-03-10 21:48:13,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119499297] [2021-03-10 21:48:13,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:48:13,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:13,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:48:13,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:48:13,757 INFO L87 Difference]: Start difference. First operand 351 states and 1107 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:14,119 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 21:48:14,407 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-10 21:48:14,933 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-03-10 21:48:15,320 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-03-10 21:48:15,489 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:48:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:15,719 INFO L93 Difference]: Finished difference Result 480 states and 1463 transitions. [2021-03-10 21:48:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:48:15,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:48:15,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:15,722 INFO L225 Difference]: With dead ends: 480 [2021-03-10 21:48:15,722 INFO L226 Difference]: Without dead ends: 470 [2021-03-10 21:48:15,722 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2335.8ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:48:15,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-03-10 21:48:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 355. [2021-03-10 21:48:15,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1610169491525424) internal successors, (1119), 354 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1119 transitions. [2021-03-10 21:48:15,726 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1119 transitions. Word has length 17 [2021-03-10 21:48:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:15,726 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1119 transitions. [2021-03-10 21:48:15,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:15,726 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1119 transitions. [2021-03-10 21:48:15,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:15,727 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:15,727 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:15,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1460,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:15,927 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:15,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:15,928 INFO L82 PathProgramCache]: Analyzing trace with hash -102239432, now seen corresponding path program 57 times [2021-03-10 21:48:15,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:15,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641523738] [2021-03-10 21:48:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:16,105 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 21:48:16,309 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 21:48:16,471 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 21:48:16,719 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 21:48:16,890 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 21:48:17,036 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-10 21:48:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:17,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641523738] [2021-03-10 21:48:17,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452901299] [2021-03-10 21:48:17,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:17,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:48:17,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:17,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:48:17,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:17,490 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 21:48:18,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:18,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:18,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:18,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:18,368 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 21:48:18,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:18,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:18,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:18,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:18,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:18,603 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:48:18,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:18,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:18,618 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:18,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:18,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:18,630 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:18,833 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 21:48:18,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:18,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-03-10 21:48:18,847 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:223, output treesize:183 [2021-03-10 21:48:19,057 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 21:48:19,346 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_338, array_2, v_prenex_330, v_prenex_332, v_prenex_334, v_prenex_336], 1=[v_prenex_329, array_0, v_prenex_331, v_prenex_333, v_prenex_335, v_prenex_337]} [2021-03-10 21:48:19,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:19,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:19,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:19,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:19,835 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 90 [2021-03-10 21:48:19,836 INFO L628 ElimStorePlain]: treesize reduction 196, result has 52.5 percent of original size [2021-03-10 21:48:19,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:48:19,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:19,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:48:19,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:20,012 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 21:48:20,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:20,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:20,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:20,180 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 21:48:20,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:20,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:20,192 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:20,346 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 21:48:20,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:20,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:48:20,360 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:20,503 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 21:48:20,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:20,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:48:20,524 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:20,671 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-10 21:48:20,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:20,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:20,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:48:20,683 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:20,838 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:48:20,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:20,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:20,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:20,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:48:20,854 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:20,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:20,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:48:20,867 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:21,014 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 21:48:21,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:21,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:21,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:48:21,028 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:21,173 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 21:48:21,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:21,174 INFO L518 ElimStorePlain]: Eliminatee v_prenex_333 vanished before elimination [2021-03-10 21:48:21,174 INFO L518 ElimStorePlain]: Eliminatee v_prenex_335 vanished before elimination [2021-03-10 21:48:21,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:21,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:48:21,185 INFO L550 ElimStorePlain]: Start of recursive call 14: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:21,307 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:48:21,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:21,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:48:21,315 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 18 variables, input treesize:431, output treesize:67 [2021-03-10 21:48:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:21,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:21,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-10 21:48:21,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159404440] [2021-03-10 21:48:21,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:48:21,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:21,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:48:21,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:48:21,500 INFO L87 Difference]: Start difference. First operand 355 states and 1119 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:21,777 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 21:48:22,121 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-10 21:48:22,428 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 21:48:22,778 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-03-10 21:48:23,296 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-03-10 21:48:23,852 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-03-10 21:48:24,259 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-03-10 21:48:24,651 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-03-10 21:48:25,582 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 71 [2021-03-10 21:48:26,273 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2021-03-10 21:48:26,560 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-03-10 21:48:26,810 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 21:48:27,825 WARN L205 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 125 [2021-03-10 21:48:28,266 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-03-10 21:48:28,549 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-03-10 21:48:28,877 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:48:29,382 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-03-10 21:48:29,831 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-03-10 21:48:30,110 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-10 21:48:30,821 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-03-10 21:48:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:31,055 INFO L93 Difference]: Finished difference Result 627 states and 1858 transitions. [2021-03-10 21:48:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:48:31,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:48:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:31,059 INFO L225 Difference]: With dead ends: 627 [2021-03-10 21:48:31,059 INFO L226 Difference]: Without dead ends: 612 [2021-03-10 21:48:31,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 9609.1ms TimeCoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:48:31,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-03-10 21:48:31,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 367. [2021-03-10 21:48:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.169398907103825) internal successors, (1160), 366 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1160 transitions. [2021-03-10 21:48:31,064 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1160 transitions. Word has length 17 [2021-03-10 21:48:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:31,064 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 1160 transitions. [2021-03-10 21:48:31,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1160 transitions. [2021-03-10 21:48:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:31,065 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:31,065 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:31,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1479 [2021-03-10 21:48:31,266 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:31,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:31,266 INFO L82 PathProgramCache]: Analyzing trace with hash -99613656, now seen corresponding path program 58 times [2021-03-10 21:48:31,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:31,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170119545] [2021-03-10 21:48:31,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:31,452 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 21:48:31,642 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 21:48:31,786 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 21:48:32,096 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-03-10 21:48:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:32,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170119545] [2021-03-10 21:48:32,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975366456] [2021-03-10 21:48:32,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:32,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:48:32,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:32,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:48:32,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:32,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:32,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:32,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:32,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:32,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:32,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:32,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:32,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:32,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:32,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:32,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:32,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:32,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:32,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:32,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:32,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:32,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:48:32,813 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:131, output treesize:99 [2021-03-10 21:48:33,288 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_349, array_2, v_prenex_345, v_prenex_347], 1=[array_0, v_prenex_344, v_prenex_346, v_prenex_348]} [2021-03-10 21:48:33,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:33,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:33,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:33,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:33,496 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2021-03-10 21:48:33,497 INFO L628 ElimStorePlain]: treesize reduction 117, result has 44.8 percent of original size [2021-03-10 21:48:33,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:33,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:33,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:33,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:48:33,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:33,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:33,669 INFO L518 ElimStorePlain]: Eliminatee v_prenex_347 vanished before elimination [2021-03-10 21:48:33,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:33,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:48:33,681 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:33,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:33,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:33,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:48:33,766 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:33,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:33,844 INFO L518 ElimStorePlain]: Eliminatee v_prenex_346 vanished before elimination [2021-03-10 21:48:33,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:33,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:48:33,857 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:33,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:33,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:48:33,931 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:231, output treesize:38 [2021-03-10 21:48:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:34,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:34,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:48:34,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684395122] [2021-03-10 21:48:34,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:48:34,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:34,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:48:34,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:48:34,049 INFO L87 Difference]: Start difference. First operand 367 states and 1160 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:34,487 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-10 21:48:34,933 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2021-03-10 21:48:35,541 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 85 [2021-03-10 21:48:36,175 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 90 [2021-03-10 21:48:36,728 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 90 [2021-03-10 21:48:36,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:36,851 INFO L93 Difference]: Finished difference Result 529 states and 1611 transitions. [2021-03-10 21:48:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:48:36,853 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:48:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:36,854 INFO L225 Difference]: With dead ends: 529 [2021-03-10 21:48:36,854 INFO L226 Difference]: Without dead ends: 517 [2021-03-10 21:48:36,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 3337.0ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:48:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-10 21:48:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 368. [2021-03-10 21:48:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.1743869209809263) internal successors, (1165), 367 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1165 transitions. [2021-03-10 21:48:36,859 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1165 transitions. Word has length 17 [2021-03-10 21:48:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:36,859 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1165 transitions. [2021-03-10 21:48:36,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:36,859 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1165 transitions. [2021-03-10 21:48:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:36,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:36,859 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:37,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1534,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:37,060 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:37,060 INFO L82 PathProgramCache]: Analyzing trace with hash 61528026, now seen corresponding path program 59 times [2021-03-10 21:48:37,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:37,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926774449] [2021-03-10 21:48:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:37,275 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-10 21:48:37,587 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 21:48:37,726 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-10 21:48:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:37,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926774449] [2021-03-10 21:48:37,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242691991] [2021-03-10 21:48:37,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:37,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:48:37,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:37,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:48:37,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:38,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:38,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:38,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:38,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:38,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:38,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:38,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:38,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:38,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:38,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:38,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:38,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:38,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:38,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:38,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:38,769 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:48:38,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:38,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:38,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:38,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:38,782 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:38,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:38,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:38,793 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:38,958 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:48:38,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:38,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-03-10 21:48:38,969 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:229, output treesize:181 [2021-03-10 21:48:39,173 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 21:48:39,551 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_360, array_2, v_prenex_362, v_prenex_364, v_prenex_356, v_prenex_358], 1=[v_prenex_361, array_4, v_prenex_363, v_prenex_365, v_prenex_357, v_prenex_359]} [2021-03-10 21:48:39,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:48:39,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:39,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:48:39,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:40,056 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 93 [2021-03-10 21:48:40,057 INFO L628 ElimStorePlain]: treesize reduction 196, result has 50.8 percent of original size [2021-03-10 21:48:40,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:48:40,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:40,237 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-10 21:48:40,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:40,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:48:40,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:40,415 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 21:48:40,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:40,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:48:40,428 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:40,600 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-10 21:48:40,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:40,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:40,614 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:40,807 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-10 21:48:40,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:40,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:48:40,821 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:41,009 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 21:48:41,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:41,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:41,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:41,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:48:41,025 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:41,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:41,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:48:41,041 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:41,222 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 21:48:41,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:41,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:41,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:48:41,239 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:41,399 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 21:48:41,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:41,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:41,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:48:41,414 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:41,564 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:48:41,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:41,565 INFO L518 ElimStorePlain]: Eliminatee v_prenex_365 vanished before elimination [2021-03-10 21:48:41,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:41,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:48:41,577 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:41,715 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 21:48:41,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:41,716 INFO L518 ElimStorePlain]: Eliminatee v_prenex_359 vanished before elimination [2021-03-10 21:48:41,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 21:48:41,723 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:419, output treesize:75 [2021-03-10 21:48:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:41,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:41,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-10 21:48:41,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081988330] [2021-03-10 21:48:41,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:48:41,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:41,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:48:41,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:48:41,898 INFO L87 Difference]: Start difference. First operand 368 states and 1165 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:42,633 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-03-10 21:48:43,346 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2021-03-10 21:48:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:43,571 INFO L93 Difference]: Finished difference Result 403 states and 1254 transitions. [2021-03-10 21:48:43,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:48:43,573 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:48:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:43,574 INFO L225 Difference]: With dead ends: 403 [2021-03-10 21:48:43,574 INFO L226 Difference]: Without dead ends: 399 [2021-03-10 21:48:43,574 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2240.2ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:48:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-03-10 21:48:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 371. [2021-03-10 21:48:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.175675675675676) internal successors, (1175), 370 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1175 transitions. [2021-03-10 21:48:43,578 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1175 transitions. Word has length 17 [2021-03-10 21:48:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:43,578 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 1175 transitions. [2021-03-10 21:48:43,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1175 transitions. [2021-03-10 21:48:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:43,579 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:43,579 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:43,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1559 [2021-03-10 21:48:43,779 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:43,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1542765896, now seen corresponding path program 60 times [2021-03-10 21:48:43,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:43,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644135154] [2021-03-10 21:48:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:44,015 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-10 21:48:44,165 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 21:48:44,450 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:48:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:44,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644135154] [2021-03-10 21:48:44,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398080844] [2021-03-10 21:48:44,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:44,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:48:44,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:44,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:48:44,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:44,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:44,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:44,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:44,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:44,983 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:48:44,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:44,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:44,994 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:45,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:45,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:45,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:45,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:48:45,094 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:127, output treesize:96 [2021-03-10 21:48:45,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:45,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:45,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:48:45,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:45,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:45,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:45,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:45,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:45,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:45,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:48:45,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:45,652 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-03-10 21:48:45,653 INFO L628 ElimStorePlain]: treesize reduction 131, result has 43.0 percent of original size [2021-03-10 21:48:45,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:45,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:48:45,667 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:45,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:45,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:45,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:45,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:45,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:45,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:45,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:45,779 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:45,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:45,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:45,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:45,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:48:45,861 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:48:45,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:45,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:48:45,871 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:45,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:45,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:48:45,943 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:257, output treesize:38 [2021-03-10 21:48:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:46,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:46,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:48:46,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995269974] [2021-03-10 21:48:46,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:48:46,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:46,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:48:46,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:48:46,076 INFO L87 Difference]: Start difference. First operand 371 states and 1175 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:46,807 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-03-10 21:48:47,214 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-03-10 21:48:47,447 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-10 21:48:47,706 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 21:48:48,062 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-03-10 21:48:48,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:48,390 INFO L93 Difference]: Finished difference Result 427 states and 1327 transitions. [2021-03-10 21:48:48,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:48:48,392 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:48:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:48,393 INFO L225 Difference]: With dead ends: 427 [2021-03-10 21:48:48,393 INFO L226 Difference]: Without dead ends: 417 [2021-03-10 21:48:48,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2618.8ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:48:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-03-10 21:48:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 371. [2021-03-10 21:48:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.175675675675676) internal successors, (1175), 370 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1175 transitions. [2021-03-10 21:48:48,398 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1175 transitions. Word has length 17 [2021-03-10 21:48:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:48,398 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 1175 transitions. [2021-03-10 21:48:48,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1175 transitions. [2021-03-10 21:48:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:48,398 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:48,398 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:48,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1617,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:48,599 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:48,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:48,599 INFO L82 PathProgramCache]: Analyzing trace with hash 997590718, now seen corresponding path program 61 times [2021-03-10 21:48:48,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:48,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606461034] [2021-03-10 21:48:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:48,873 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 21:48:49,171 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 21:48:49,318 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 21:48:49,609 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:48:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:49,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606461034] [2021-03-10 21:48:49,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76681962] [2021-03-10 21:48:49,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:49,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:48:49,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:50,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:50,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:50,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:50,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:50,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:50,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:50,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:48:50,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:50,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:50,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:50,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:50,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:50,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:50,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:50,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:50,338 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:48:50,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:50,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:48:50,349 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:219, output treesize:189 [2021-03-10 21:48:50,562 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 21:48:51,023 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-03-10 21:48:51,787 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_381, array_2, v_prenex_383, v_prenex_385, v_prenex_388, v_prenex_379], 1=[v_prenex_380, v_prenex_382, v_prenex_384, array_4, v_prenex_386, v_prenex_389]} [2021-03-10 21:48:51,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:51,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:51,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:51,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:52,398 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 90 [2021-03-10 21:48:52,399 INFO L628 ElimStorePlain]: treesize reduction 193, result has 53.7 percent of original size [2021-03-10 21:48:52,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:52,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:52,605 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 21:48:52,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:52,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:48:52,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:52,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:48:52,632 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:52,822 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 21:48:52,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:52,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:52,835 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:53,037 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 21:48:53,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:53,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:48:53,051 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:53,230 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 21:48:53,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:53,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:53,242 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:53,398 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 21:48:53,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:53,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:53,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:48:53,413 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:53,600 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 21:48:53,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:53,601 INFO L518 ElimStorePlain]: Eliminatee v_prenex_382 vanished before elimination [2021-03-10 21:48:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:53,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:53,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:48:53,618 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:53,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:53,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:48:53,632 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:53,821 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:48:53,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:53,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:53,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:48:53,836 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:54,028 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:48:54,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:54,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:54,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:48:54,043 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:54,214 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:48:54,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:54,214 INFO L518 ElimStorePlain]: Eliminatee v_prenex_389 vanished before elimination [2021-03-10 21:48:54,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 21:48:54,221 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 18 variables, input treesize:435, output treesize:75 [2021-03-10 21:48:54,393 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 17 [2021-03-10 21:48:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:54,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:48:54,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-10 21:48:54,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643385263] [2021-03-10 21:48:54,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:48:54,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:48:54,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:48:54,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:48:54,417 INFO L87 Difference]: Start difference. First operand 371 states and 1175 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:55,463 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2021-03-10 21:48:56,432 WARN L205 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 122 [2021-03-10 21:48:56,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:48:56,820 INFO L93 Difference]: Finished difference Result 436 states and 1348 transitions. [2021-03-10 21:48:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:48:56,822 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:48:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:48:56,823 INFO L225 Difference]: With dead ends: 436 [2021-03-10 21:48:56,823 INFO L226 Difference]: Without dead ends: 426 [2021-03-10 21:48:56,823 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 3646.4ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:48:56,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-03-10 21:48:56,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 370. [2021-03-10 21:48:56,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.1734417344173442) internal successors, (1171), 369 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1171 transitions. [2021-03-10 21:48:56,829 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1171 transitions. Word has length 17 [2021-03-10 21:48:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:48:56,829 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 1171 transitions. [2021-03-10 21:48:56,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:48:56,829 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1171 transitions. [2021-03-10 21:48:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:48:56,830 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:48:56,830 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:48:57,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1630,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:57,035 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:48:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:48:57,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2091682306, now seen corresponding path program 62 times [2021-03-10 21:48:57,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:48:57,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254501002] [2021-03-10 21:48:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:48:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:48:57,318 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 21:48:57,586 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 21:48:57,870 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:48:58,079 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 21:48:58,227 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-10 21:48:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:48:58,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254501002] [2021-03-10 21:48:58,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119865650] [2021-03-10 21:48:58,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:48:58,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:48:58,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:48:58,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:48:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:48:58,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:58,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:58,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:48:58,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:58,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:58,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:58,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:58,805 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:48:58,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:58,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:58,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:58,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:48:58,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:58,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:58,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:58,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:48:58,973 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:48:58,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:48:58,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:48:58,983 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:159, output treesize:123 [2021-03-10 21:48:59,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:48:59,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:48:59,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:00,163 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2021-03-10 21:49:00,164 INFO L628 ElimStorePlain]: treesize reduction 141, result has 47.4 percent of original size [2021-03-10 21:49:00,164 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:49:00,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:00,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:00,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:00,299 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 21:49:00,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:00,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:00,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:49:00,316 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:00,436 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 21:49:00,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:00,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:00,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:00,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:00,564 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:49:00,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:00,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:00,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:49:00,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:00,698 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:49:00,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:00,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:00,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:00,711 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:00,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:00,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:00,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:49:00,821 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:00,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:00,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:49:00,915 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 16 variables, input treesize:279, output treesize:38 [2021-03-10 21:49:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:01,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:01,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-03-10 21:49:01,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025633605] [2021-03-10 21:49:01,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:49:01,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:01,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:49:01,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:49:01,022 INFO L87 Difference]: Start difference. First operand 370 states and 1171 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:01,829 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 21:49:02,382 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-03-10 21:49:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:02,758 INFO L93 Difference]: Finished difference Result 433 states and 1345 transitions. [2021-03-10 21:49:02,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:02,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:49:02,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:02,761 INFO L225 Difference]: With dead ends: 433 [2021-03-10 21:49:02,761 INFO L226 Difference]: Without dead ends: 423 [2021-03-10 21:49:02,761 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2415.0ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:49:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-03-10 21:49:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 372. [2021-03-10 21:49:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.1725067385444743) internal successors, (1177), 371 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1177 transitions. [2021-03-10 21:49:02,766 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1177 transitions. Word has length 17 [2021-03-10 21:49:02,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:02,766 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 1177 transitions. [2021-03-10 21:49:02,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1177 transitions. [2021-03-10 21:49:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:02,766 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:02,766 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:02,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1675 [2021-03-10 21:49:02,967 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:02,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1276876152, now seen corresponding path program 63 times [2021-03-10 21:49:02,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:02,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66445827] [2021-03-10 21:49:02,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:03,293 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-10 21:49:03,528 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 21:49:03,766 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 21:49:03,990 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 21:49:04,161 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 21:49:04,301 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 21:49:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:04,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66445827] [2021-03-10 21:49:04,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840500067] [2021-03-10 21:49:04,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:04,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:49:04,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:04,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:49:04,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:04,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:04,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:04,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:04,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:04,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:04,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:04,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:05,075 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:49:05,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:05,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:05,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:05,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:05,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:05,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:05,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:05,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:05,221 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 21:49:05,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:05,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:49:05,231 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:139, output treesize:103 [2021-03-10 21:49:05,600 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_410, v_prenex_412, v_prenex_414], 1=[array_0, v_prenex_409, v_prenex_411, v_prenex_413]} [2021-03-10 21:49:05,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:05,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:05,885 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-03-10 21:49:05,886 INFO L628 ElimStorePlain]: treesize reduction 113, result has 47.7 percent of original size [2021-03-10 21:49:05,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:05,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:05,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:05,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:05,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:06,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:06,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:06,094 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:06,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:06,175 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-03-10 21:49:06,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:06,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:49:06,189 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:06,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:06,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:06,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:49:06,281 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:06,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:06,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:06,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:49:06,373 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:06,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:06,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:49:06,455 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:223, output treesize:38 [2021-03-10 21:49:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:06,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:06,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-03-10 21:49:06,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144820896] [2021-03-10 21:49:06,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:49:06,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:06,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:49:06,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:49:06,607 INFO L87 Difference]: Start difference. First operand 372 states and 1177 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:07,435 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 21:49:07,943 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-03-10 21:49:08,634 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-03-10 21:49:08,952 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 21:49:09,330 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-10 21:49:09,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:09,647 INFO L93 Difference]: Finished difference Result 444 states and 1376 transitions. [2021-03-10 21:49:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:49:09,650 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:49:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:09,651 INFO L225 Difference]: With dead ends: 444 [2021-03-10 21:49:09,651 INFO L226 Difference]: Without dead ends: 429 [2021-03-10 21:49:09,651 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 3691.3ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:49:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-03-10 21:49:09,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 370. [2021-03-10 21:49:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.1734417344173442) internal successors, (1171), 369 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1171 transitions. [2021-03-10 21:49:09,655 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1171 transitions. Word has length 17 [2021-03-10 21:49:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:09,656 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 1171 transitions. [2021-03-10 21:49:09,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1171 transitions. [2021-03-10 21:49:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:09,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:09,656 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:09,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1720,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:09,857 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1996192008, now seen corresponding path program 64 times [2021-03-10 21:49:09,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:09,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249990329] [2021-03-10 21:49:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:10,179 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-10 21:49:10,415 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-10 21:49:10,816 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 21:49:11,004 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 21:49:11,201 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 21:49:11,384 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-10 21:49:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:11,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249990329] [2021-03-10 21:49:11,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231242605] [2021-03-10 21:49:11,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:11,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:49:11,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:11,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:49:11,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:11,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:11,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:11,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:11,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:11,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:11,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:12,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:49:12,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:12,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:12,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:12,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:12,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:12,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:12,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:12,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:12,306 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:49:12,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:12,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:49:12,318 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:245, output treesize:214 [2021-03-10 21:49:12,537 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 21:49:13,351 INFO L446 ElimStorePlain]: Different costs {1=[array_0, v_prenex_423], 15=[array_4], 21=[v_prenex_424]} [2021-03-10 21:49:13,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:13,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:13,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:13,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:13,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:49:13,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:13,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:49:13,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:13,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:13,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:49:13,447 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:14,094 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 93 [2021-03-10 21:49:14,095 INFO L628 ElimStorePlain]: treesize reduction 238, result has 48.6 percent of original size [2021-03-10 21:49:14,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:49:14,109 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:14,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:49:14,123 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:14,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:14,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:49:14,138 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:14,366 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-10 21:49:14,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:14,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:14,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:14,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:49:14,385 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:14,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:14,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:14,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:49:14,402 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:14,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:14,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:49:14,418 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:14,633 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 21:49:14,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:14,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:14,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:49:14,650 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:14,855 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 21:49:14,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:14,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:49:14,864 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 17 variables, input treesize:509, output treesize:97 [2021-03-10 21:49:15,050 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 19 [2021-03-10 21:49:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:15,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:15,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-10 21:49:15,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577637517] [2021-03-10 21:49:15,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:49:15,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:15,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:49:15,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:49:15,086 INFO L87 Difference]: Start difference. First operand 370 states and 1171 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:16,013 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-03-10 21:49:16,768 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 108 [2021-03-10 21:49:18,439 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 172 DAG size of output: 137 [2021-03-10 21:49:18,901 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-10 21:49:19,134 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 14 [2021-03-10 21:49:19,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:19,607 INFO L93 Difference]: Finished difference Result 451 states and 1383 transitions. [2021-03-10 21:49:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:49:19,610 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:49:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:19,611 INFO L225 Difference]: With dead ends: 451 [2021-03-10 21:49:19,611 INFO L226 Difference]: Without dead ends: 419 [2021-03-10 21:49:19,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 5545.5ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:49:19,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-03-10 21:49:19,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 377. [2021-03-10 21:49:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.1702127659574466) internal successors, (1192), 376 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1192 transitions. [2021-03-10 21:49:19,615 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1192 transitions. Word has length 17 [2021-03-10 21:49:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:19,615 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 1192 transitions. [2021-03-10 21:49:19,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:19,616 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1192 transitions. [2021-03-10 21:49:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:19,616 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:19,616 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:19,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1745 [2021-03-10 21:49:19,817 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:19,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:19,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1653608496, now seen corresponding path program 65 times [2021-03-10 21:49:19,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:19,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522989448] [2021-03-10 21:49:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:20,084 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-03-10 21:49:20,291 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 21:49:20,593 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-10 21:49:20,840 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 21:49:21,108 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-10 21:49:21,288 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-03-10 21:49:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:21,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522989448] [2021-03-10 21:49:21,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472866586] [2021-03-10 21:49:21,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:21,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:49:21,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:21,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:49:21,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:21,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:21,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:21,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:21,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:21,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:21,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:21,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:49:21,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:21,843 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:49:21,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:21,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:49:21,847 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:220, output treesize:186 [2021-03-10 21:49:22,103 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:49:22,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:22,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:22,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:22,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:22,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:49:22,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:22,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:22,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:22,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:49:22,241 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:22,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:49:22,257 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:22,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:22,273 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:22,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:22,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:49:22,291 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:23,076 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-03-10 21:49:23,077 INFO L628 ElimStorePlain]: treesize reduction 181, result has 57.3 percent of original size [2021-03-10 21:49:23,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:49:23,095 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:23,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:49:23,111 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:23,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:49:23,127 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:23,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:23,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:49:23,141 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:23,422 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:49:23,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:23,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:49:23,426 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:499, output treesize:204 [2021-03-10 21:49:23,773 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 21:49:24,256 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-10 21:49:24,559 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 17 [2021-03-10 21:49:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:24,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:24,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 21:49:24,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400830731] [2021-03-10 21:49:24,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:49:24,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:24,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:49:24,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:49:24,586 INFO L87 Difference]: Start difference. First operand 377 states and 1192 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:25,406 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-10 21:49:26,132 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-03-10 21:49:27,255 WARN L205 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-03-10 21:49:28,037 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-03-10 21:49:28,584 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-10 21:49:28,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:28,667 INFO L93 Difference]: Finished difference Result 450 states and 1380 transitions. [2021-03-10 21:49:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:49:28,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:49:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:28,670 INFO L225 Difference]: With dead ends: 450 [2021-03-10 21:49:28,670 INFO L226 Difference]: Without dead ends: 420 [2021-03-10 21:49:28,670 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 5705.3ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:49:28,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-03-10 21:49:28,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 377. [2021-03-10 21:49:28,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.1702127659574466) internal successors, (1192), 376 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1192 transitions. [2021-03-10 21:49:28,674 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1192 transitions. Word has length 17 [2021-03-10 21:49:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:28,675 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 1192 transitions. [2021-03-10 21:49:28,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:28,675 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1192 transitions. [2021-03-10 21:49:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:28,675 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:28,675 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:28,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1764,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:28,876 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:28,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:28,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1205884026, now seen corresponding path program 66 times [2021-03-10 21:49:28,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:28,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798606116] [2021-03-10 21:49:28,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:29,154 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 21:49:29,340 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 21:49:29,649 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-10 21:49:29,860 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-10 21:49:30,060 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-10 21:49:30,230 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2021-03-10 21:49:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:30,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798606116] [2021-03-10 21:49:30,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261973116] [2021-03-10 21:49:30,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:30,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:49:30,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:30,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:49:30,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:30,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:30,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:30,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:30,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:30,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:30,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:30,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:30,926 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:49:30,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:30,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:30,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:30,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:30,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:30,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:30,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:30,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:31,092 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:49:31,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:31,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:49:31,103 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:139, output treesize:113 [2021-03-10 21:49:31,668 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_438, array_2, v_prenex_434, v_prenex_436], 1=[v_prenex_437, v_prenex_439, array_4, v_prenex_435]} [2021-03-10 21:49:31,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:31,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:31,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:31,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:31,928 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-03-10 21:49:31,929 INFO L628 ElimStorePlain]: treesize reduction 123, result has 45.3 percent of original size [2021-03-10 21:49:31,930 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:49:31,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:49:31,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:32,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:32,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:32,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:32,151 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:49:32,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:32,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:32,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:49:32,171 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:32,278 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:49:32,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:32,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:32,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:49:32,296 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:32,401 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:49:32,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:32,402 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:49:32,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:32,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:49:32,416 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:32,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:32,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:49:32,523 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:243, output treesize:38 [2021-03-10 21:49:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:32,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:32,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:49:32,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941467851] [2021-03-10 21:49:32,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:49:32,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:32,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:49:32,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:49:32,691 INFO L87 Difference]: Start difference. First operand 377 states and 1192 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:33,322 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 21:49:33,593 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-10 21:49:33,906 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 21:49:34,399 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-03-10 21:49:35,351 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2021-03-10 21:49:36,590 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 137 DAG size of output: 101 [2021-03-10 21:49:37,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:37,016 INFO L93 Difference]: Finished difference Result 460 states and 1427 transitions. [2021-03-10 21:49:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:49:37,019 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:49:37,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:37,020 INFO L225 Difference]: With dead ends: 460 [2021-03-10 21:49:37,020 INFO L226 Difference]: Without dead ends: 450 [2021-03-10 21:49:37,020 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4821.5ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:49:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-03-10 21:49:37,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 381. [2021-03-10 21:49:37,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.168421052631579) internal successors, (1204), 380 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1204 transitions. [2021-03-10 21:49:37,024 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1204 transitions. Word has length 17 [2021-03-10 21:49:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:37,024 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 1204 transitions. [2021-03-10 21:49:37,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1204 transitions. [2021-03-10 21:49:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:37,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:37,025 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:37,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1786 [2021-03-10 21:49:37,226 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:37,226 INFO L82 PathProgramCache]: Analyzing trace with hash 391077872, now seen corresponding path program 67 times [2021-03-10 21:49:37,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:37,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438425320] [2021-03-10 21:49:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:37,505 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 21:49:37,685 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 21:49:37,882 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:49:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:38,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438425320] [2021-03-10 21:49:38,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345396557] [2021-03-10 21:49:38,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:38,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:49:38,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:38,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:38,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:38,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:38,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:38,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:38,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:49:38,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:38,843 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:49:38,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:38,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:38,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:38,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:38,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:38,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:38,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:38,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:39,036 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 21:49:39,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:39,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:49:39,047 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:192, output treesize:162 [2021-03-10 21:49:39,225 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 21:49:39,407 INFO L446 ElimStorePlain]: Different costs {1=[array_2], 10=[array_0]} [2021-03-10 21:49:39,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:39,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:39,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:39,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:39,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:39,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:39,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:39,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:49:39,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:39,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:39,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:49:39,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:39,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:39,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:39,494 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:39,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:39,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:39,508 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:39,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:39,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:49:39,523 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:39,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:49:39,536 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:40,141 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-03-10 21:49:40,142 INFO L628 ElimStorePlain]: treesize reduction 138, result has 58.7 percent of original size [2021-03-10 21:49:40,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:40,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:40,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:49:40,158 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:40,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:40,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:40,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:49:40,175 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:40,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:40,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:40,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:49:40,191 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:40,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:40,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:49:40,204 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:40,420 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 21:49:40,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:40,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:49:40,426 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:411, output treesize:103 [2021-03-10 21:49:40,653 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:49:40,841 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-03-10 21:49:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:40,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:40,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:49:40,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219839016] [2021-03-10 21:49:40,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:49:40,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:40,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:49:40,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:49:40,879 INFO L87 Difference]: Start difference. First operand 381 states and 1204 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:41,407 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 21:49:41,921 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-03-10 21:49:42,510 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2021-03-10 21:49:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:42,902 INFO L93 Difference]: Finished difference Result 457 states and 1419 transitions. [2021-03-10 21:49:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:42,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:49:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:42,906 INFO L225 Difference]: With dead ends: 457 [2021-03-10 21:49:42,906 INFO L226 Difference]: Without dead ends: 446 [2021-03-10 21:49:42,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2639.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:49:42,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-03-10 21:49:42,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 379. [2021-03-10 21:49:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.1693121693121693) internal successors, (1198), 378 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1198 transitions. [2021-03-10 21:49:42,910 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1198 transitions. Word has length 17 [2021-03-10 21:49:42,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:42,910 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 1198 transitions. [2021-03-10 21:49:42,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1198 transitions. [2021-03-10 21:49:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:42,911 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:42,911 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:43,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1811 [2021-03-10 21:49:43,112 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:43,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:43,112 INFO L82 PathProgramCache]: Analyzing trace with hash 981448970, now seen corresponding path program 68 times [2021-03-10 21:49:43,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:43,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817062771] [2021-03-10 21:49:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:43,511 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 21:49:43,691 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 21:49:43,873 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 21:49:44,084 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 21:49:44,278 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 21:49:44,460 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-10 21:49:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:44,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817062771] [2021-03-10 21:49:44,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647147917] [2021-03-10 21:49:44,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:44,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:49:44,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:44,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:49:44,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:44,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:44,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:44,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:44,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:44,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:44,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:44,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:45,019 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:49:45,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:45,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:45,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:45,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:45,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:45,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:45,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:45,045 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:45,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:45,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:49:45,150 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:130, output treesize:104 [2021-03-10 21:49:45,632 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_450, v_prenex_452, v_prenex_454], 1=[v_prenex_449, array_0, v_prenex_451, v_prenex_453]} [2021-03-10 21:49:45,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:45,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:45,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:45,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:46,030 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-03-10 21:49:46,031 INFO L628 ElimStorePlain]: treesize reduction 93, result has 62.7 percent of original size [2021-03-10 21:49:46,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:46,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:46,202 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:49:46,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:46,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:49:46,216 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:46,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:49:46,229 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:46,372 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:49:46,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:46,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:49:46,385 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:46,545 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:49:46,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:46,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:46,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:49:46,558 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:46,699 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:49:46,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:46,700 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-03-10 21:49:46,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:46,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:46,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:49:46,718 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:46,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:46,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:49:46,731 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:46,862 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:49:46,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:46,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:46,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:49:46,878 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:46,993 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:49:46,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:47,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:49:47,001 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:263, output treesize:50 [2021-03-10 21:49:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:47,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:47,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:49:47,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717909496] [2021-03-10 21:49:47,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:49:47,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:49:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:49:47,203 INFO L87 Difference]: Start difference. First operand 379 states and 1198 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:47,693 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-03-10 21:49:47,960 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 21:49:48,229 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2021-03-10 21:49:48,699 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-03-10 21:49:49,906 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 119 DAG size of output: 93 [2021-03-10 21:49:50,766 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2021-03-10 21:49:51,625 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2021-03-10 21:49:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:49:51,823 INFO L93 Difference]: Finished difference Result 500 states and 1542 transitions. [2021-03-10 21:49:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:49:51,826 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:49:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:49:51,827 INFO L225 Difference]: With dead ends: 500 [2021-03-10 21:49:51,827 INFO L226 Difference]: Without dead ends: 488 [2021-03-10 21:49:51,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 5193.0ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:49:51,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-03-10 21:49:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 379. [2021-03-10 21:49:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.1693121693121693) internal successors, (1198), 378 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1198 transitions. [2021-03-10 21:49:51,832 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1198 transitions. Word has length 17 [2021-03-10 21:49:51,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:49:51,832 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 1198 transitions. [2021-03-10 21:49:51,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1198 transitions. [2021-03-10 21:49:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:49:51,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:49:51,833 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:49:52,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1835,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:52,034 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:49:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:49:52,034 INFO L82 PathProgramCache]: Analyzing trace with hash 527178728, now seen corresponding path program 69 times [2021-03-10 21:49:52,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:49:52,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659614972] [2021-03-10 21:49:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:49:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:49:52,423 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 21:49:52,685 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 21:49:52,930 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 21:49:53,103 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-10 21:49:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:53,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659614972] [2021-03-10 21:49:53,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417600013] [2021-03-10 21:49:53,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:49:53,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:49:53,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:49:53,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:49:53,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:49:53,540 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:49:53,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:53,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:53,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:53,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:53,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:53,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:53,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:49:53,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:53,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:53,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:54,079 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 21:49:54,080 INFO L628 ElimStorePlain]: treesize reduction 20, result has 89.7 percent of original size [2021-03-10 21:49:54,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:49:54,083 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:233, output treesize:174 [2021-03-10 21:49:54,357 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:49:54,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:54,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:54,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:49:54,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:54,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:54,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:49:54,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:55,760 WARN L205 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-03-10 21:49:55,761 INFO L628 ElimStorePlain]: treesize reduction 167, result has 57.3 percent of original size [2021-03-10 21:49:55,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:55,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:55,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:56,093 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 21:49:56,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:56,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:49:56,112 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:56,418 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 21:49:56,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:56,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:49:56,435 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:56,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:49:56,448 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:56,715 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 21:49:56,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:56,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:49:56,731 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:56,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:49:56,744 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:56,983 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 21:49:56,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:56,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:56,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:49:56,996 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:49:57,227 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 21:49:57,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:57,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:49:57,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:49:57,243 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:49:57,465 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:49:57,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:49:57,466 INFO L518 ElimStorePlain]: Eliminatee v_prenex_458 vanished before elimination [2021-03-10 21:49:57,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:49:57,473 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:405, output treesize:122 [2021-03-10 21:49:57,929 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 21:49:58,156 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 17 [2021-03-10 21:49:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:49:58,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:49:58,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:49:58,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980374996] [2021-03-10 21:49:58,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:49:58,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:49:58,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:49:58,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:49:58,177 INFO L87 Difference]: Start difference. First operand 379 states and 1198 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:49:58,880 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 21:49:59,390 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-03-10 21:50:00,548 WARN L205 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-03-10 21:50:01,699 WARN L205 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 68 [2021-03-10 21:50:02,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:02,145 INFO L93 Difference]: Finished difference Result 450 states and 1398 transitions. [2021-03-10 21:50:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:50:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:02,149 INFO L225 Difference]: With dead ends: 450 [2021-03-10 21:50:02,149 INFO L226 Difference]: Without dead ends: 440 [2021-03-10 21:50:02,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 5004.5ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:50:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-03-10 21:50:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 383. [2021-03-10 21:50:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.167539267015707) internal successors, (1210), 382 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1210 transitions. [2021-03-10 21:50:02,154 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1210 transitions. Word has length 17 [2021-03-10 21:50:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:02,154 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 1210 transitions. [2021-03-10 21:50:02,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1210 transitions. [2021-03-10 21:50:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:02,154 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:02,154 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:02,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1860 [2021-03-10 21:50:02,355 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:02,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:02,355 INFO L82 PathProgramCache]: Analyzing trace with hash 869762240, now seen corresponding path program 70 times [2021-03-10 21:50:02,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:02,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515610668] [2021-03-10 21:50:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:02,587 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:50:02,751 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:50:02,922 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-10 21:50:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:03,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515610668] [2021-03-10 21:50:03,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912594526] [2021-03-10 21:50:03,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:03,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:50:03,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:03,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:50:03,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:03,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:03,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:03,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:03,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:03,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:03,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:03,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:03,853 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:50:03,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:03,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:03,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:03,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:03,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:03,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:03,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:03,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:04,060 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:50:04,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:04,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:04,084 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:163, output treesize:127 [2021-03-10 21:50:04,285 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 21:50:04,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:04,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:04,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:05,067 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2021-03-10 21:50:05,068 INFO L628 ElimStorePlain]: treesize reduction 133, result has 47.6 percent of original size [2021-03-10 21:50:05,068 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-03-10 21:50:05,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:05,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:05,220 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:50:05,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:05,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:05,236 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:05,356 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:50:05,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:05,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:05,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:05,486 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:50:05,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:05,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:50:05,500 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:05,616 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 21:50:05,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:05,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:05,629 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:05,740 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:50:05,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:05,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:05,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:05,756 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:05,857 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:50:05,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:05,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:50:05,863 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 16 variables, input treesize:265, output treesize:38 [2021-03-10 21:50:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:06,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:06,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 21:50:06,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277279779] [2021-03-10 21:50:06,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:50:06,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:06,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:50:06,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:50:06,003 INFO L87 Difference]: Start difference. First operand 383 states and 1210 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:06,481 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 21:50:06,680 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 21:50:06,917 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-10 21:50:07,313 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-03-10 21:50:07,876 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-03-10 21:50:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:08,187 INFO L93 Difference]: Finished difference Result 448 states and 1392 transitions. [2021-03-10 21:50:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:50:08,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:08,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:08,191 INFO L225 Difference]: With dead ends: 448 [2021-03-10 21:50:08,191 INFO L226 Difference]: Without dead ends: 437 [2021-03-10 21:50:08,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2367.1ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:50:08,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-03-10 21:50:08,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 383. [2021-03-10 21:50:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.167539267015707) internal successors, (1210), 382 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1210 transitions. [2021-03-10 21:50:08,195 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1210 transitions. Word has length 17 [2021-03-10 21:50:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:08,195 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 1210 transitions. [2021-03-10 21:50:08,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1210 transitions. [2021-03-10 21:50:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:08,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:08,196 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:08,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1905,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:08,396 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:08,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1237021880, now seen corresponding path program 71 times [2021-03-10 21:50:08,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:08,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355250472] [2021-03-10 21:50:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:08,640 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 21:50:08,824 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 21:50:09,030 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 21:50:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:09,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355250472] [2021-03-10 21:50:09,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063434557] [2021-03-10 21:50:09,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:09,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:50:09,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:09,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:50:09,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:09,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:09,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:09,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:09,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:09,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:09,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:09,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:09,827 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:50:09,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:09,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:09,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:09,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:09,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:09,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:09,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:50:09,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:09,987 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:50:09,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:09,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:09,998 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:148, output treesize:110 [2021-03-10 21:50:10,400 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:50:10,591 INFO L446 ElimStorePlain]: Different costs {1=[array_2], 10=[array_0]} [2021-03-10 21:50:10,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:10,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:10,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:10,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:10,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:10,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:10,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:10,641 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:10,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:10,654 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:10,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:10,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:10,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:10,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:50:10,680 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:10,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:50:10,691 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:11,279 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-03-10 21:50:11,280 INFO L628 ElimStorePlain]: treesize reduction 134, result has 55.3 percent of original size [2021-03-10 21:50:11,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:50:11,295 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:11,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:50:11,313 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:11,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:11,346 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:11,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:11,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:11,363 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:11,576 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:50:11,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:11,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:50:11,584 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:371, output treesize:103 [2021-03-10 21:50:11,818 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:50:12,044 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-03-10 21:50:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:12,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:12,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:12,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372859430] [2021-03-10 21:50:12,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:12,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:12,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:12,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:12,094 INFO L87 Difference]: Start difference. First operand 383 states and 1210 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:12,521 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 21:50:12,700 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-10 21:50:12,908 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 21:50:13,359 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-03-10 21:50:13,959 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-03-10 21:50:15,101 WARN L205 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2021-03-10 21:50:15,682 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-03-10 21:50:15,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:15,885 INFO L93 Difference]: Finished difference Result 490 states and 1510 transitions. [2021-03-10 21:50:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:50:15,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:15,888 INFO L225 Difference]: With dead ends: 490 [2021-03-10 21:50:15,888 INFO L226 Difference]: Without dead ends: 478 [2021-03-10 21:50:15,888 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 4431.1ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:50:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-03-10 21:50:15,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 383. [2021-03-10 21:50:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.167539267015707) internal successors, (1210), 382 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1210 transitions. [2021-03-10 21:50:15,894 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1210 transitions. Word has length 17 [2021-03-10 21:50:15,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:15,894 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 1210 transitions. [2021-03-10 21:50:15,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:15,895 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1210 transitions. [2021-03-10 21:50:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:15,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:15,895 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:16,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1940,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:16,107 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:16,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:16,107 INFO L82 PathProgramCache]: Analyzing trace with hash -176185004, now seen corresponding path program 72 times [2021-03-10 21:50:16,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:16,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593890860] [2021-03-10 21:50:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:16,964 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 21:50:17,229 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-10 21:50:17,462 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-03-10 21:50:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:17,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593890860] [2021-03-10 21:50:17,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571610457] [2021-03-10 21:50:17,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:17,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:50:17,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:17,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:50:17,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:17,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:17,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:50:17,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:17,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:17,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:17,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:17,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:17,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:17,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:17,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:17,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:18,152 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:50:18,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:18,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:50:18,156 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:193, output treesize:159 [2021-03-10 21:50:18,442 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:50:18,835 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 21:50:19,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:19,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:19,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:50:19,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:19,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:19,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:19,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:19,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:19,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:19,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:19,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:19,835 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2021-03-10 21:50:19,836 INFO L628 ElimStorePlain]: treesize reduction 155, result has 48.7 percent of original size [2021-03-10 21:50:19,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:19,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:19,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,034 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:50:20,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:20,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:50:20,049 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,233 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:50:20,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:20,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:20,250 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:20,431 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:50:20,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:20,432 INFO L518 ElimStorePlain]: Eliminatee v_prenex_484 vanished before elimination [2021-03-10 21:50:20,432 INFO L518 ElimStorePlain]: Eliminatee v_prenex_485 vanished before elimination [2021-03-10 21:50:20,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:50:20,447 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:20,460 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:20,613 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:50:20,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:20,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:20,632 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:20,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:20,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-03-10 21:50:20,649 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:20,799 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:50:20,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:20,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:50:20,806 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:330, output treesize:67 [2021-03-10 21:50:21,043 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-03-10 21:50:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:21,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:21,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-10 21:50:21,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240495950] [2021-03-10 21:50:21,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:50:21,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:21,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:50:21,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:50:21,075 INFO L87 Difference]: Start difference. First operand 383 states and 1210 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:21,633 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-10 21:50:22,187 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-03-10 21:50:22,537 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-10 21:50:23,000 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-10 21:50:23,543 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-03-10 21:50:24,560 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-03-10 21:50:25,041 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-03-10 21:50:26,611 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2021-03-10 21:50:27,512 WARN L205 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-03-10 21:50:29,236 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2021-03-10 21:50:31,428 WARN L205 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 127 DAG size of output: 78 [2021-03-10 21:50:33,196 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 105 DAG size of output: 74 [2021-03-10 21:50:33,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:33,531 INFO L93 Difference]: Finished difference Result 475 states and 1456 transitions. [2021-03-10 21:50:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:50:33,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:33,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:33,535 INFO L225 Difference]: With dead ends: 475 [2021-03-10 21:50:33,535 INFO L226 Difference]: Without dead ends: 463 [2021-03-10 21:50:33,536 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 13230.7ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:50:33,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-03-10 21:50:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 386. [2021-03-10 21:50:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.155844155844156) internal successors, (1215), 385 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1215 transitions. [2021-03-10 21:50:33,540 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1215 transitions. Word has length 17 [2021-03-10 21:50:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:33,540 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 1215 transitions. [2021-03-10 21:50:33,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1215 transitions. [2021-03-10 21:50:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:33,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:33,541 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:33,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1971 [2021-03-10 21:50:33,741 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:33,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:33,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1305052866, now seen corresponding path program 73 times [2021-03-10 21:50:33,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:33,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197477752] [2021-03-10 21:50:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:33,944 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-03-10 21:50:34,521 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:50:34,709 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 21:50:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:34,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197477752] [2021-03-10 21:50:34,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719541226] [2021-03-10 21:50:34,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:34,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:50:34,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:35,227 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 21:50:35,407 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 21:50:35,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:35,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:35,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:35,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:35,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:35,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:35,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:35,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:35,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:35,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:35,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:36,302 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-10 21:50:36,303 INFO L628 ElimStorePlain]: treesize reduction 8, result has 96.3 percent of original size [2021-03-10 21:50:36,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:36,318 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:36,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:36,332 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:36,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:36,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:36,342 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:36,560 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:50:36,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:36,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-03-10 21:50:36,577 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:239, output treesize:176 [2021-03-10 21:50:36,863 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-10 21:50:37,259 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_504, array_0, v_prenex_496, v_prenex_498, v_prenex_500, v_prenex_502], 1=[v_prenex_503, v_prenex_505, array_4, v_prenex_497, v_prenex_499, v_prenex_501]} [2021-03-10 21:50:37,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:37,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:37,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:37,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:38,001 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 90 [2021-03-10 21:50:38,002 INFO L628 ElimStorePlain]: treesize reduction 186, result has 52.7 percent of original size [2021-03-10 21:50:38,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:50:38,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:38,283 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-10 21:50:38,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:38,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:38,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:38,533 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-10 21:50:38,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:38,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:38,546 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:38,794 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 21:50:38,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:38,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:38,810 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:39,062 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-10 21:50:39,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:39,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:50:39,074 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:39,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:50:39,085 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:39,261 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 21:50:39,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:39,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:39,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:39,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:39,284 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:39,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:39,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:50:39,303 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:39,537 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 21:50:39,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:39,539 INFO L518 ElimStorePlain]: Eliminatee v_prenex_505 vanished before elimination [2021-03-10 21:50:39,539 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:50:39,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:39,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:50:39,554 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:39,774 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:50:39,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:39,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:39,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:39,793 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:40,000 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:50:40,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:40,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:40,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:40,022 INFO L550 ElimStorePlain]: Start of recursive call 14: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:40,219 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 21:50:40,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:40,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:50:40,227 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 18 variables, input treesize:407, output treesize:67 [2021-03-10 21:50:40,443 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2021-03-10 21:50:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:40,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:40,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:50:40,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938738039] [2021-03-10 21:50:40,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:50:40,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:40,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:50:40,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:50:40,494 INFO L87 Difference]: Start difference. First operand 386 states and 1215 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:41,508 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-03-10 21:50:41,843 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:50:42,480 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-03-10 21:50:43,055 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-03-10 21:50:44,038 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 95 [2021-03-10 21:50:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:44,300 INFO L93 Difference]: Finished difference Result 453 states and 1396 transitions. [2021-03-10 21:50:44,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:50:44,303 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:44,304 INFO L225 Difference]: With dead ends: 453 [2021-03-10 21:50:44,304 INFO L226 Difference]: Without dead ends: 445 [2021-03-10 21:50:44,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 4467.2ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:50:44,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-03-10 21:50:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 386. [2021-03-10 21:50:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.155844155844156) internal successors, (1215), 385 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1215 transitions. [2021-03-10 21:50:44,309 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1215 transitions. Word has length 17 [2021-03-10 21:50:44,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:44,309 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 1215 transitions. [2021-03-10 21:50:44,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1215 transitions. [2021-03-10 21:50:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:44,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:44,309 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:44,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2016,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:44,510 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:44,510 INFO L82 PathProgramCache]: Analyzing trace with hash 733598060, now seen corresponding path program 74 times [2021-03-10 21:50:44,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:44,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823645639] [2021-03-10 21:50:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:44,703 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 21:50:44,882 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 21:50:45,203 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 21:50:45,464 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 21:50:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:45,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823645639] [2021-03-10 21:50:45,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521653958] [2021-03-10 21:50:45,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:45,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:50:45,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:45,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:50:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:46,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:46,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:46,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:46,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:46,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:46,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:46,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:46,247 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:50:46,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:46,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:46,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:46,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:46,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:46,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:46,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:46,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:46,393 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 21:50:46,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:46,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:46,406 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:129, output treesize:98 [2021-03-10 21:50:47,041 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_514, array_0, v_prenex_510, v_prenex_512], 1=[v_prenex_515, array_4, v_prenex_511, v_prenex_513]} [2021-03-10 21:50:47,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:47,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:47,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:47,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:47,501 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-03-10 21:50:47,503 INFO L628 ElimStorePlain]: treesize reduction 85, result has 63.8 percent of original size [2021-03-10 21:50:47,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:50:47,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:47,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:50:47,531 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:47,700 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 21:50:47,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:47,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:47,714 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:47,863 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:50:47,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:47,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:50:47,875 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:48,005 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 21:50:48,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:48,006 INFO L518 ElimStorePlain]: Eliminatee v_prenex_515 vanished before elimination [2021-03-10 21:50:48,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:48,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:48,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:50:48,020 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:48,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:48,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:50:48,034 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:48,180 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:50:48,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:48,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:48,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:48,200 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:48,342 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:50:48,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:48,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:48,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:50:48,360 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:50:48,501 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:50:48,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:48,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:50:48,509 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:253, output treesize:48 [2021-03-10 21:50:48,698 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 21:50:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:48,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:50:48,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:50:48,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869504596] [2021-03-10 21:50:48,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:50:48,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:50:48,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:50:48,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:50:48,751 INFO L87 Difference]: Start difference. First operand 386 states and 1215 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:49,597 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 21:50:49,905 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 21:50:50,499 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-10 21:50:51,035 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-03-10 21:50:51,800 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-10 21:50:52,244 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-03-10 21:50:52,857 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-10 21:50:54,285 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2021-03-10 21:50:54,702 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-10 21:50:55,682 WARN L205 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-03-10 21:50:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:50:56,163 INFO L93 Difference]: Finished difference Result 591 states and 1772 transitions. [2021-03-10 21:50:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:50:56,167 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:50:56,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:50:56,168 INFO L225 Difference]: With dead ends: 591 [2021-03-10 21:50:56,168 INFO L226 Difference]: Without dead ends: 565 [2021-03-10 21:50:56,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 6796.9ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:50:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-03-10 21:50:56,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 384. [2021-03-10 21:50:56,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.1592689295039165) internal successors, (1210), 383 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:56,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1210 transitions. [2021-03-10 21:50:56,173 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1210 transitions. Word has length 17 [2021-03-10 21:50:56,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:50:56,173 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1210 transitions. [2021-03-10 21:50:56,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:50:56,173 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1210 transitions. [2021-03-10 21:50:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:50:56,173 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:50:56,173 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:50:56,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2065,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:56,374 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:50:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:50:56,374 INFO L82 PathProgramCache]: Analyzing trace with hash 247722142, now seen corresponding path program 75 times [2021-03-10 21:50:56,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:50:56,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588347158] [2021-03-10 21:50:56,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:50:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:50:56,577 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 21:50:56,769 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 21:50:56,958 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 21:50:57,364 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-10 21:50:57,678 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-10 21:50:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:50:57,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588347158] [2021-03-10 21:50:57,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119863929] [2021-03-10 21:50:57,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:50:57,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:50:57,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:50:57,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:50:57,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:50:58,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:58,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:50:58,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,634 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-10 21:50:58,636 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.8 percent of original size [2021-03-10 21:50:58,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:50:58,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:50:58,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:50:58,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:58,808 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 21:50:58,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:50:58,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:50:58,820 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:147, output treesize:104 [2021-03-10 21:50:59,018 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:50:59,257 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_520, v_prenex_522, v_prenex_524], 1=[v_prenex_525, array_4, v_prenex_521, v_prenex_523]} [2021-03-10 21:50:59,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:50:59,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:59,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:59,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:59,769 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-03-10 21:50:59,770 INFO L628 ElimStorePlain]: treesize reduction 85, result has 63.2 percent of original size [2021-03-10 21:50:59,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:50:59,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:50:59,989 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 21:50:59,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:00,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:51:00,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:00,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-03-10 21:51:00,020 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:00,176 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 21:51:00,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:00,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:51:00,189 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:00,319 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:51:00,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:00,320 INFO L518 ElimStorePlain]: Eliminatee v_prenex_525 vanished before elimination [2021-03-10 21:51:00,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:00,340 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:00,519 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 21:51:00,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:00,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:00,536 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:00,716 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:51:00,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:00,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:51:00,734 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:00,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:00,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:51:00,750 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:00,898 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:51:00,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:00,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:51:00,907 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:245, output treesize:48 [2021-03-10 21:51:01,150 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 21:51:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:01,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:01,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:51:01,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295355796] [2021-03-10 21:51:01,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:51:01,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:01,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:51:01,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:51:01,205 INFO L87 Difference]: Start difference. First operand 384 states and 1210 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:02,011 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-10 21:51:02,334 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-03-10 21:51:02,909 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-03-10 21:51:03,499 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-03-10 21:51:04,029 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-03-10 21:51:04,746 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-03-10 21:51:05,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:05,206 INFO L93 Difference]: Finished difference Result 485 states and 1486 transitions. [2021-03-10 21:51:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:51:05,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:51:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:05,210 INFO L225 Difference]: With dead ends: 485 [2021-03-10 21:51:05,210 INFO L226 Difference]: Without dead ends: 469 [2021-03-10 21:51:05,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 4467.5ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:51:05,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-03-10 21:51:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 380. [2021-03-10 21:51:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.158311345646438) internal successors, (1197), 379 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1197 transitions. [2021-03-10 21:51:05,215 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1197 transitions. Word has length 17 [2021-03-10 21:51:05,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:05,215 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 1197 transitions. [2021-03-10 21:51:05,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1197 transitions. [2021-03-10 21:51:05,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:05,216 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:05,216 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:05,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2098,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:05,416 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:05,416 INFO L82 PathProgramCache]: Analyzing trace with hash 692518350, now seen corresponding path program 76 times [2021-03-10 21:51:05,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:05,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287597053] [2021-03-10 21:51:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:05,598 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 21:51:05,750 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 21:51:05,875 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 21:51:06,239 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 21:51:06,448 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-10 21:51:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:06,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287597053] [2021-03-10 21:51:06,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160846878] [2021-03-10 21:51:06,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:06,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:51:06,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:06,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:51:06,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:06,956 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:51:07,286 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 21:51:07,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:07,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:07,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:07,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:07,789 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:51:07,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:07,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:07,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:07,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:07,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,051 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:51:08,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:08,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:08,064 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:08,078 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,290 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:51:08,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:08,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:51:08,295 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:204, output treesize:164 [2021-03-10 21:51:08,593 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:51:08,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:08,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:51:08,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:08,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:08,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:08,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:09,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:09,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:09,034 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:09,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:09,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:09,712 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-03-10 21:51:09,713 INFO L628 ElimStorePlain]: treesize reduction 189, result has 47.6 percent of original size [2021-03-10 21:51:09,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:51:09,728 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:09,974 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:51:09,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:09,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:09,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:09,998 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:10,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:10,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:10,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:51:10,016 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:10,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:10,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:10,037 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:10,230 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:51:10,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:10,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:10,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:10,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:51:10,244 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:10,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:10,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:10,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:51:10,260 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:10,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:10,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:10,274 INFO L550 ElimStorePlain]: Start of recursive call 14: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:10,442 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:51:10,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:10,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:51:10,449 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:407, output treesize:67 [2021-03-10 21:51:10,690 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2021-03-10 21:51:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:10,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:10,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-10 21:51:10,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392698001] [2021-03-10 21:51:10,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:51:10,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:10,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:51:10,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:51:10,726 INFO L87 Difference]: Start difference. First operand 380 states and 1197 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:11,922 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-03-10 21:51:12,867 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-03-10 21:51:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:13,062 INFO L93 Difference]: Finished difference Result 417 states and 1284 transitions. [2021-03-10 21:51:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:51:13,064 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:51:13,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:13,065 INFO L225 Difference]: With dead ends: 417 [2021-03-10 21:51:13,065 INFO L226 Difference]: Without dead ends: 411 [2021-03-10 21:51:13,065 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 3546.4ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:51:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-03-10 21:51:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 382. [2021-03-10 21:51:13,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.1548556430446193) internal successors, (1202), 381 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1202 transitions. [2021-03-10 21:51:13,069 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1202 transitions. Word has length 17 [2021-03-10 21:51:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:13,069 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1202 transitions. [2021-03-10 21:51:13,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1202 transitions. [2021-03-10 21:51:13,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:13,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:13,069 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:13,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2128 [2021-03-10 21:51:13,270 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:13,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:13,270 INFO L82 PathProgramCache]: Analyzing trace with hash -2121211076, now seen corresponding path program 77 times [2021-03-10 21:51:13,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:13,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031517285] [2021-03-10 21:51:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:13,552 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 21:51:13,775 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 21:51:14,002 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 21:51:14,417 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:51:14,609 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 21:51:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:14,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031517285] [2021-03-10 21:51:14,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255051844] [2021-03-10 21:51:14,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:14,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:51:14,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:14,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:51:14,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:15,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:15,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:15,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:15,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:15,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:15,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:15,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:15,369 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:51:15,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:15,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:15,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:15,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:15,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:15,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:15,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:15,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:15,559 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 21:51:15,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:15,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:15,573 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:139, output treesize:102 [2021-03-10 21:51:15,782 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:51:16,091 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_537, v_prenex_539, array_0, v_prenex_535], 1=[v_prenex_536, v_prenex_538, array_4, v_prenex_540]} [2021-03-10 21:51:16,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:16,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:16,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:16,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:16,554 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-03-10 21:51:16,555 INFO L628 ElimStorePlain]: treesize reduction 85, result has 61.2 percent of original size [2021-03-10 21:51:16,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:51:16,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:16,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:51:16,580 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:16,715 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:51:16,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:16,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:16,727 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:16,890 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:51:16,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:16,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:51:16,906 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:17,058 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:51:17,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:17,060 INFO L518 ElimStorePlain]: Eliminatee v_prenex_536 vanished before elimination [2021-03-10 21:51:17,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:17,078 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:17,250 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:51:17,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:17,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:17,269 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:17,434 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:51:17,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:17,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:51:17,455 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:17,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:17,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:17,474 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:17,601 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:51:17,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:17,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:51:17,608 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:241, output treesize:48 [2021-03-10 21:51:17,818 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 21:51:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:17,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:17,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:51:17,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18959598] [2021-03-10 21:51:17,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:51:17,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:17,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:51:17,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:51:17,873 INFO L87 Difference]: Start difference. First operand 382 states and 1202 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:18,487 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-03-10 21:51:18,909 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-03-10 21:51:19,392 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2021-03-10 21:51:19,583 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 21:51:20,070 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-03-10 21:51:20,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:20,498 INFO L93 Difference]: Finished difference Result 445 states and 1373 transitions. [2021-03-10 21:51:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:51:20,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:51:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:20,503 INFO L225 Difference]: With dead ends: 445 [2021-03-10 21:51:20,503 INFO L226 Difference]: Without dead ends: 429 [2021-03-10 21:51:20,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 3378.2ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:51:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-03-10 21:51:20,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 380. [2021-03-10 21:51:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.158311345646438) internal successors, (1197), 379 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1197 transitions. [2021-03-10 21:51:20,507 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1197 transitions. Word has length 17 [2021-03-10 21:51:20,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:20,507 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 1197 transitions. [2021-03-10 21:51:20,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1197 transitions. [2021-03-10 21:51:20,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:20,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:20,508 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:20,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2160,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:20,708 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:20,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1628581042, now seen corresponding path program 78 times [2021-03-10 21:51:20,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:20,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125677314] [2021-03-10 21:51:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:20,888 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 21:51:21,068 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-10 21:51:21,202 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 21:51:21,478 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 21:51:21,678 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 21:51:21,840 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 21:51:22,071 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:51:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:22,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125677314] [2021-03-10 21:51:22,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257176211] [2021-03-10 21:51:22,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:22,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:51:22,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:22,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:51:22,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:22,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:22,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:22,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:22,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:22,639 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 21:51:22,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:22,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:22,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:22,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:22,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:22,776 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 21:51:22,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:22,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:51:22,780 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:127, output treesize:97 [2021-03-10 21:51:22,953 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 21:51:23,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:23,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:23,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:51:23,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:23,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:23,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:23,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:51:23,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:23,626 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-03-10 21:51:23,627 INFO L628 ElimStorePlain]: treesize reduction 137, result has 39.6 percent of original size [2021-03-10 21:51:23,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:51:23,646 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:23,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:23,665 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:23,794 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:51:23,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:23,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:51:23,810 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:23,935 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:51:23,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:23,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:23,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:51:23,948 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:24,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:24,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:51:24,040 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:259, output treesize:38 [2021-03-10 21:51:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:24,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:24,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:51:24,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467344764] [2021-03-10 21:51:24,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:51:24,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:24,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:51:24,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:51:24,180 INFO L87 Difference]: Start difference. First operand 380 states and 1197 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:24,817 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-03-10 21:51:25,267 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 21:51:26,118 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-03-10 21:51:26,966 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-03-10 21:51:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:27,421 INFO L93 Difference]: Finished difference Result 448 states and 1375 transitions. [2021-03-10 21:51:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:51:27,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:51:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:27,425 INFO L225 Difference]: With dead ends: 448 [2021-03-10 21:51:27,425 INFO L226 Difference]: Without dead ends: 438 [2021-03-10 21:51:27,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3833.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:27,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-03-10 21:51:27,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 379. [2021-03-10 21:51:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.1560846560846563) internal successors, (1193), 378 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1193 transitions. [2021-03-10 21:51:27,429 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1193 transitions. Word has length 17 [2021-03-10 21:51:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:27,430 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 1193 transitions. [2021-03-10 21:51:27,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1193 transitions. [2021-03-10 21:51:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:27,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:27,430 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:27,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:27,631 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:27,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1572294666, now seen corresponding path program 79 times [2021-03-10 21:51:27,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:27,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152534778] [2021-03-10 21:51:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:27,850 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 21:51:28,112 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 21:51:28,428 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:51:28,650 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 21:51:28,823 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-10 21:51:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:28,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152534778] [2021-03-10 21:51:28,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476260448] [2021-03-10 21:51:28,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:28,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:51:28,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:29,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:29,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:29,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:29,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:29,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:29,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:29,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:29,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:51:29,338 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:29,605 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:51:29,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:29,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:51:29,609 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:193, output treesize:163 [2021-03-10 21:51:29,916 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:51:30,332 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 21:51:30,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:51:30,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:30,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:30,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:30,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:51:30,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:30,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:51:30,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:30,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:30,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:30,750 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:31,334 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-03-10 21:51:31,336 INFO L628 ElimStorePlain]: treesize reduction 181, result has 42.5 percent of original size [2021-03-10 21:51:31,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:31,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:31,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:51:31,355 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:31,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:31,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:31,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:51:31,374 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:31,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:31,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:31,396 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:31,608 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:51:31,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:31,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:31,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:31,625 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:31,820 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:51:31,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:31,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:31,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:31,841 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:32,024 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:51:32,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:32,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:51:32,031 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:352, output treesize:62 [2021-03-10 21:51:32,237 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2021-03-10 21:51:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:32,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:32,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-10 21:51:32,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862587591] [2021-03-10 21:51:32,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:51:32,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:51:32,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:51:32,274 INFO L87 Difference]: Start difference. First operand 379 states and 1193 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:33,291 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-03-10 21:51:34,209 WARN L205 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-03-10 21:51:35,568 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-03-10 21:51:35,795 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:51:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:36,227 INFO L93 Difference]: Finished difference Result 447 states and 1381 transitions. [2021-03-10 21:51:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:51:36,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:51:36,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:36,232 INFO L225 Difference]: With dead ends: 447 [2021-03-10 21:51:36,232 INFO L226 Difference]: Without dead ends: 437 [2021-03-10 21:51:36,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 4976.7ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:51:36,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-03-10 21:51:36,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 381. [2021-03-10 21:51:36,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.155263157894737) internal successors, (1199), 380 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1199 transitions. [2021-03-10 21:51:36,236 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1199 transitions. Word has length 17 [2021-03-10 21:51:36,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:36,236 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 1199 transitions. [2021-03-10 21:51:36,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:36,236 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1199 transitions. [2021-03-10 21:51:36,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:36,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:36,237 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:36,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2205 [2021-03-10 21:51:36,437 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:36,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1907866476, now seen corresponding path program 80 times [2021-03-10 21:51:36,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:36,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128240314] [2021-03-10 21:51:36,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:36,713 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2021-03-10 21:51:37,112 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 21:51:37,447 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 21:51:37,747 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 21:51:38,002 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 21:51:38,175 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 21:51:38,362 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 21:51:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:38,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128240314] [2021-03-10 21:51:38,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606629664] [2021-03-10 21:51:38,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:38,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:51:38,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:38,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:51:38,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:38,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:38,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:38,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:38,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:38,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:39,166 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:51:39,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:39,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:39,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:39,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:39,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:39,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:39,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:39,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:39,370 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:51:39,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:39,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:51:39,385 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:139, output treesize:105 [2021-03-10 21:51:39,620 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:51:39,907 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_552, v_prenex_554, v_prenex_556], 1=[array_2, v_prenex_553, v_prenex_555, v_prenex_557]} [2021-03-10 21:51:39,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:39,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:39,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:39,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:40,507 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-03-10 21:51:40,508 INFO L628 ElimStorePlain]: treesize reduction 85, result has 63.8 percent of original size [2021-03-10 21:51:40,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:51:40,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:40,718 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 21:51:40,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:40,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:51:40,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:40,917 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:51:40,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:40,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:51:40,934 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:40,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:51:40,950 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:41,150 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:51:41,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:41,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:41,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:51:41,171 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:41,358 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 21:51:41,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:41,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:41,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:51:41,379 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:41,536 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:51:41,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:41,537 INFO L518 ElimStorePlain]: Eliminatee v_prenex_555 vanished before elimination [2021-03-10 21:51:41,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:41,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:41,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:51:41,557 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:41,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:41,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:51:41,574 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:51:41,723 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:51:41,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:41,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:51:41,732 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:247, output treesize:48 [2021-03-10 21:51:41,992 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 21:51:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:42,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:42,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-03-10 21:51:42,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475067706] [2021-03-10 21:51:42,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:51:42,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:42,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:51:42,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:51:42,062 INFO L87 Difference]: Start difference. First operand 381 states and 1199 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:42,716 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-03-10 21:51:43,467 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-03-10 21:51:43,999 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-03-10 21:51:44,749 WARN L205 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-03-10 21:51:45,211 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 21:51:45,723 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 21:51:46,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:51:46,163 INFO L93 Difference]: Finished difference Result 458 states and 1412 transitions. [2021-03-10 21:51:46,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:51:46,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:51:46,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:51:46,167 INFO L225 Difference]: With dead ends: 458 [2021-03-10 21:51:46,167 INFO L226 Difference]: Without dead ends: 443 [2021-03-10 21:51:46,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 5129.2ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:51:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-03-10 21:51:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 379. [2021-03-10 21:51:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.1560846560846563) internal successors, (1193), 378 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1193 transitions. [2021-03-10 21:51:46,173 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1193 transitions. Word has length 17 [2021-03-10 21:51:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:51:46,173 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 1193 transitions. [2021-03-10 21:51:46,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1193 transitions. [2021-03-10 21:51:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:51:46,174 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:51:46,174 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:51:46,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2218 [2021-03-10 21:51:46,391 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:51:46,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:51:46,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1365201684, now seen corresponding path program 81 times [2021-03-10 21:51:46,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:51:46,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091832954] [2021-03-10 21:51:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:51:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:51:46,579 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 21:51:46,755 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-10 21:51:47,070 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-10 21:51:47,600 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 21:51:47,878 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 21:51:48,137 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 21:51:48,371 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-10 21:51:48,554 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 21:51:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:48,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091832954] [2021-03-10 21:51:48,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128402812] [2021-03-10 21:51:48,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:51:48,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:51:48,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:51:48,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 21:51:48,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:51:48,992 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:51:49,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:49,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:49,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:49,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:49,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:49,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:49,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:51:49,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:49,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:49,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:49,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:49,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:49,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:49,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:49,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:49,483 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:51:49,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:49,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:51:49,489 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:245, output treesize:210 [2021-03-10 21:51:49,901 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:51:50,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:51:50,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:50,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:51:50,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:51:50,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:51:50,096 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:51:50,115 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:50,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:51:50,134 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:50,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:51:50,153 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:51,242 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 21:51:51,243 INFO L628 ElimStorePlain]: treesize reduction 181, result has 59.2 percent of original size [2021-03-10 21:51:51,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:51,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:51,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:51:51,262 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:51,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:51,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:51,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:51:51,278 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:51,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:51,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:51,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:51:51,297 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:51,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:51:51,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:51:51,313 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:51:51,749 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:51:51,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:51:51,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:51:51,754 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:507, output treesize:212 [2021-03-10 21:51:52,231 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:51:53,069 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-10 21:51:53,509 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 17 [2021-03-10 21:51:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:51:53,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:51:53,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:51:53,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616330662] [2021-03-10 21:51:53,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:51:53,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:51:53,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:51:53,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:51:53,533 INFO L87 Difference]: Start difference. First operand 379 states and 1193 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:51:55,379 WARN L205 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-03-10 21:51:56,494 WARN L205 SmtUtils]: Spent 927.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2021-03-10 21:51:57,793 WARN L205 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-10 21:51:58,030 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 4 [2021-03-10 21:51:59,530 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-03-10 21:52:01,053 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-03-10 21:52:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:01,526 INFO L93 Difference]: Finished difference Result 467 states and 1417 transitions. [2021-03-10 21:52:01,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:52:01,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:52:01,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:01,532 INFO L225 Difference]: With dead ends: 467 [2021-03-10 21:52:01,532 INFO L226 Difference]: Without dead ends: 422 [2021-03-10 21:52:01,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 10390.2ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:52:01,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-03-10 21:52:01,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 382. [2021-03-10 21:52:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.15748031496063) internal successors, (1203), 381 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1203 transitions. [2021-03-10 21:52:01,536 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1203 transitions. Word has length 17 [2021-03-10 21:52:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:01,536 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1203 transitions. [2021-03-10 21:52:01,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1203 transitions. [2021-03-10 21:52:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:01,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:01,537 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:01,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2251 [2021-03-10 21:52:01,737 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:01,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1022618172, now seen corresponding path program 82 times [2021-03-10 21:52:01,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:01,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535809394] [2021-03-10 21:52:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:02,047 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-03-10 21:52:02,361 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 21:52:02,753 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-10 21:52:03,124 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 21:52:03,522 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-10 21:52:03,766 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-03-10 21:52:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:03,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535809394] [2021-03-10 21:52:03,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130929170] [2021-03-10 21:52:03,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:03,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:52:03,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:03,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:52:03,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:04,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:04,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:04,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:52:04,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:04,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:04,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:04,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:04,530 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:52:04,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:04,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:04,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:04,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:04,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:04,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:04,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:04,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:04,730 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:52:04,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:04,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:04,744 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:148, output treesize:118 [2021-03-10 21:52:04,978 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 21:52:05,321 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_562, v_prenex_564, v_prenex_566], 1=[array_2, v_prenex_563, v_prenex_565, v_prenex_567]} [2021-03-10 21:52:05,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:05,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:52:05,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:05,863 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-03-10 21:52:05,865 INFO L628 ElimStorePlain]: treesize reduction 95, result has 62.6 percent of original size [2021-03-10 21:52:05,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:05,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:06,093 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 21:52:06,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:06,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:52:06,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:06,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:52:06,125 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:06,277 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 21:52:06,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:06,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:52:06,291 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:06,464 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:52:06,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:06,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:06,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:06,486 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:06,683 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:52:06,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:06,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:06,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:52:06,705 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:06,874 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:52:06,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:06,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:06,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:06,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:06,895 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:06,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:06,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:06,911 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:07,045 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:52:07,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:07,046 INFO L518 ElimStorePlain]: Eliminatee v_prenex_567 vanished before elimination [2021-03-10 21:52:07,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:52:07,054 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:272, output treesize:48 [2021-03-10 21:52:07,320 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 21:52:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:07,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:07,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:52:07,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373208197] [2021-03-10 21:52:07,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:52:07,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:07,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:52:07,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:52:07,401 INFO L87 Difference]: Start difference. First operand 382 states and 1203 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:08,096 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-03-10 21:52:08,859 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-03-10 21:52:10,039 WARN L205 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2021-03-10 21:52:10,616 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-10 21:52:11,370 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-03-10 21:52:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:11,856 INFO L93 Difference]: Finished difference Result 438 states and 1357 transitions. [2021-03-10 21:52:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:52:11,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:52:11,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:11,861 INFO L225 Difference]: With dead ends: 438 [2021-03-10 21:52:11,861 INFO L226 Difference]: Without dead ends: 427 [2021-03-10 21:52:11,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 5427.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-03-10 21:52:11,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 381. [2021-03-10 21:52:11,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.1605263157894736) internal successors, (1201), 380 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1201 transitions. [2021-03-10 21:52:11,865 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1201 transitions. Word has length 17 [2021-03-10 21:52:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:11,865 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 1201 transitions. [2021-03-10 21:52:11,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1201 transitions. [2021-03-10 21:52:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:11,866 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:11,866 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:12,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2270,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:12,067 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:12,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:12,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1599914564, now seen corresponding path program 83 times [2021-03-10 21:52:12,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:12,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556124889] [2021-03-10 21:52:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:12,277 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-10 21:52:12,492 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 21:52:12,795 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 21:52:13,045 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-10 21:52:13,278 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-10 21:52:13,564 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2021-03-10 21:52:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:13,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556124889] [2021-03-10 21:52:13,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973397326] [2021-03-10 21:52:13,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:13,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:52:13,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:52:13,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:13,899 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 21:52:13,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:13,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:13,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:13,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:13,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:13,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:13,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:52:13,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:13,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:13,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:13,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:13,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:13,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:13,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:13,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:14,205 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:52:14,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:14,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:52:14,209 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:161, output treesize:126 [2021-03-10 21:52:14,492 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:52:14,811 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:52:14,966 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_568], 1=[v_prenex_569, array_4]} [2021-03-10 21:52:14,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:14,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:14,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:15,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:15,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:15,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:15,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:15,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:15,816 WARN L205 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-10 21:52:15,817 INFO L628 ElimStorePlain]: treesize reduction 147, result has 56.6 percent of original size [2021-03-10 21:52:15,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:52:15,833 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:15,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:52:15,848 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:15,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:52:15,864 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,216 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 21:52:16,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:16,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:16,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:16,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:52:16,238 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:16,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:16,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:52:16,259 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:16,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:52:16,276 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:16,600 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:52:16,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:16,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:16,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:52:16,622 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:16,881 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:52:16,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:16,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:52:16,894 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:371, output treesize:127 [2021-03-10 21:52:17,202 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:52:17,606 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2021-03-10 21:52:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:17,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:17,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:52:17,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926633319] [2021-03-10 21:52:17,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:52:17,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:17,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:52:17,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:52:17,634 INFO L87 Difference]: Start difference. First operand 381 states and 1201 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:18,111 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 21:52:18,507 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-10 21:52:19,468 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-03-10 21:52:20,496 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-03-10 21:52:21,215 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-10 21:52:22,259 WARN L205 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-03-10 21:52:23,422 WARN L205 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-03-10 21:52:24,866 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-03-10 21:52:25,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:25,333 INFO L93 Difference]: Finished difference Result 531 states and 1640 transitions. [2021-03-10 21:52:25,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:52:25,337 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:52:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:25,338 INFO L225 Difference]: With dead ends: 531 [2021-03-10 21:52:25,338 INFO L226 Difference]: Without dead ends: 515 [2021-03-10 21:52:25,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 8749.5ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:52:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-03-10 21:52:25,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 383. [2021-03-10 21:52:25,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.1596858638743455) internal successors, (1207), 382 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:25,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1207 transitions. [2021-03-10 21:52:25,343 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1207 transitions. Word has length 17 [2021-03-10 21:52:25,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:25,343 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 1207 transitions. [2021-03-10 21:52:25,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:25,343 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1207 transitions. [2021-03-10 21:52:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:25,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:25,344 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:25,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2295,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:25,544 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:25,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:25,544 INFO L82 PathProgramCache]: Analyzing trace with hash -324965886, now seen corresponding path program 84 times [2021-03-10 21:52:25,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:25,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789058366] [2021-03-10 21:52:25,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:25,750 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 21:52:26,045 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-10 21:52:26,353 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 21:52:26,641 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 21:52:26,908 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-10 21:52:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:26,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789058366] [2021-03-10 21:52:26,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989227945] [2021-03-10 21:52:26,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:27,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:52:27,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:27,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:52:27,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:27,528 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:52:27,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:27,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:27,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:27,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:27,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:27,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:52:27,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:28,115 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:52:28,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:28,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:28,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:28,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:28,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:28,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:28,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:28,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:28,413 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:52:28,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:28,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:28,429 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:180, output treesize:145 [2021-03-10 21:52:28,693 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 21:52:29,095 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_4]} [2021-03-10 21:52:29,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:29,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:52:29,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:29,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:29,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:52:29,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:29,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:29,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:29,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:29,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:29,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:52:29,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:29,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:29,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:52:29,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:29,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:29,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:29,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:29,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:29,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:29,217 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:29,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:29,230 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:30,037 WARN L205 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-03-10 21:52:30,038 INFO L628 ElimStorePlain]: treesize reduction 140, result has 55.1 percent of original size [2021-03-10 21:52:30,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:30,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:30,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:52:30,056 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:30,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:30,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:30,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:52:30,076 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:30,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:30,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:30,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:30,097 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:30,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:30,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:52:30,112 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:30,382 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:52:30,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:30,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:52:30,392 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:377, output treesize:103 [2021-03-10 21:52:30,736 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:52:30,993 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-10 21:52:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:31,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:31,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:52:31,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972665772] [2021-03-10 21:52:31,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:52:31,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:31,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:52:31,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:52:31,031 INFO L87 Difference]: Start difference. First operand 383 states and 1207 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:31,997 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 21:52:32,814 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-03-10 21:52:33,713 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2021-03-10 21:52:34,671 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2021-03-10 21:52:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:35,338 INFO L93 Difference]: Finished difference Result 466 states and 1447 transitions. [2021-03-10 21:52:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:52:35,342 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:52:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:35,342 INFO L225 Difference]: With dead ends: 466 [2021-03-10 21:52:35,342 INFO L226 Difference]: Without dead ends: 452 [2021-03-10 21:52:35,343 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 4988.5ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:52:35,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-03-10 21:52:35,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 385. [2021-03-10 21:52:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.1588541666666665) internal successors, (1213), 384 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1213 transitions. [2021-03-10 21:52:35,347 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1213 transitions. Word has length 17 [2021-03-10 21:52:35,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:35,347 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 1213 transitions. [2021-03-10 21:52:35,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:35,347 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1213 transitions. [2021-03-10 21:52:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:35,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:35,347 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:35,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2312 [2021-03-10 21:52:35,548 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:35,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:35,548 INFO L82 PathProgramCache]: Analyzing trace with hash 17617626, now seen corresponding path program 85 times [2021-03-10 21:52:35,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:35,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249976206] [2021-03-10 21:52:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:35,920 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-10 21:52:36,230 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 21:52:36,936 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-10 21:52:37,431 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 21:52:37,629 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 21:52:37,789 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-10 21:52:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:37,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249976206] [2021-03-10 21:52:37,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102275168] [2021-03-10 21:52:37,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:37,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:52:37,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:38,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:38,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:38,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:38,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:38,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:38,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:38,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:38,713 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:52:38,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:38,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:38,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:38,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:52:38,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:38,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:38,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:38,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:38,956 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 21:52:38,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:38,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:38,972 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:139, output treesize:103 [2021-03-10 21:52:39,207 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 21:52:39,521 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_580, v_prenex_582, v_prenex_578], 1=[array_2, v_prenex_581, v_prenex_583, v_prenex_579]} [2021-03-10 21:52:39,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:39,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:39,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:52:39,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:39,973 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-03-10 21:52:39,975 INFO L628 ElimStorePlain]: treesize reduction 115, result has 45.2 percent of original size [2021-03-10 21:52:39,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:52:39,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:40,133 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:52:40,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:40,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:40,150 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:40,257 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:52:40,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:40,258 INFO L518 ElimStorePlain]: Eliminatee v_prenex_578 vanished before elimination [2021-03-10 21:52:40,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:40,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:52:40,275 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:40,389 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:52:40,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:40,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:40,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:52:40,408 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:40,543 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 21:52:40,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:40,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:40,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:40,567 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:40,705 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 21:52:40,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:40,707 INFO L518 ElimStorePlain]: Eliminatee v_prenex_579 vanished before elimination [2021-03-10 21:52:40,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:52:40,716 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:223, output treesize:38 [2021-03-10 21:52:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:40,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:40,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:52:40,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58168419] [2021-03-10 21:52:40,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:52:40,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:40,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:52:40,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:52:40,931 INFO L87 Difference]: Start difference. First operand 385 states and 1213 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:41,290 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-10 21:52:41,897 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 21:52:42,281 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 21:52:43,409 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-03-10 21:52:45,205 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-03-10 21:52:45,886 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-10 21:52:46,499 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 21:52:46,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:46,941 INFO L93 Difference]: Finished difference Result 460 states and 1431 transitions. [2021-03-10 21:52:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:52:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:52:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:46,947 INFO L225 Difference]: With dead ends: 460 [2021-03-10 21:52:46,947 INFO L226 Difference]: Without dead ends: 449 [2021-03-10 21:52:46,947 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 6889.7ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:52:46,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-03-10 21:52:46,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 381. [2021-03-10 21:52:46,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.1605263157894736) internal successors, (1201), 380 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1201 transitions. [2021-03-10 21:52:46,951 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1201 transitions. Word has length 17 [2021-03-10 21:52:46,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:46,951 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 1201 transitions. [2021-03-10 21:52:46,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1201 transitions. [2021-03-10 21:52:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:46,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:46,952 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:47,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2341,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:47,152 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:47,153 INFO L82 PathProgramCache]: Analyzing trace with hash -574938828, now seen corresponding path program 86 times [2021-03-10 21:52:47,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:47,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868459966] [2021-03-10 21:52:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:47,525 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-10 21:52:47,695 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 21:52:47,844 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 21:52:48,075 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 21:52:48,309 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-10 21:52:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:48,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868459966] [2021-03-10 21:52:48,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225233458] [2021-03-10 21:52:48,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:48,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:52:48,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:48,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:52:48,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:48,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:52:48,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:48,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:48,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:49,256 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 21:52:49,257 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.6 percent of original size [2021-03-10 21:52:49,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:49,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:49,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:49,281 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:49,426 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 21:52:49,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:49,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:52:49,430 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:99 [2021-03-10 21:52:49,671 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 21:52:49,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:49,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:50,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:50,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:50,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:50,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:50,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:50,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:50,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:50,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:52:50,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:50,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:50,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:50,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:50,578 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-10 21:52:50,579 INFO L628 ElimStorePlain]: treesize reduction 108, result has 56.6 percent of original size [2021-03-10 21:52:50,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:50,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:50,602 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:50,855 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:52:50,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:50,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:50,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:50,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:52:50,878 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:50,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:50,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:50,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:52:50,900 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:50,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:50,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:52:50,918 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:51,138 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:52:51,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:51,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:51,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:51,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:52:51,157 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:51,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:51,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:51,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:52:51,173 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:51,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:51,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:52:51,187 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:51,337 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:52:51,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:51,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:52:51,345 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:287, output treesize:48 [2021-03-10 21:52:51,631 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 21:52:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:51,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:52:51,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:52:51,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579154615] [2021-03-10 21:52:51,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:52:51,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:52:51,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:52:51,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:52:51,678 INFO L87 Difference]: Start difference. First operand 381 states and 1201 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:52,119 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-03-10 21:52:52,629 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-10 21:52:53,164 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-03-10 21:52:53,352 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:52:53,756 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 21:52:54,434 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 21:52:54,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:52:54,859 INFO L93 Difference]: Finished difference Result 441 states and 1363 transitions. [2021-03-10 21:52:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:52:54,863 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:52:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:52:54,864 INFO L225 Difference]: With dead ends: 441 [2021-03-10 21:52:54,864 INFO L226 Difference]: Without dead ends: 431 [2021-03-10 21:52:54,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 4285.6ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:52:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-03-10 21:52:54,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 382. [2021-03-10 21:52:54,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.1627296587926508) internal successors, (1205), 381 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:54,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1205 transitions. [2021-03-10 21:52:54,869 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1205 transitions. Word has length 17 [2021-03-10 21:52:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:52:54,869 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1205 transitions. [2021-03-10 21:52:54,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:52:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1205 transitions. [2021-03-10 21:52:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:52:54,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:52:54,869 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:52:55,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2366,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:55,070 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:52:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:52:55,070 INFO L82 PathProgramCache]: Analyzing trace with hash 906299042, now seen corresponding path program 87 times [2021-03-10 21:52:55,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:52:55,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951706425] [2021-03-10 21:52:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:52:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:52:55,522 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-10 21:52:55,770 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 21:52:56,292 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 21:52:56,540 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 21:52:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:52:56,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951706425] [2021-03-10 21:52:56,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278751730] [2021-03-10 21:52:56,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:52:56,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:52:56,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:52:56,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:52:56,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:52:57,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:57,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:57,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:57,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:57,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:57,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:52:57,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:57,459 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:52:57,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:57,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:57,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:57,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:57,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:57,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:57,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:57,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:57,699 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:52:57,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:57,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:52:57,715 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:139, output treesize:98 [2021-03-10 21:52:57,946 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:52:58,294 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_592, v_prenex_594, v_prenex_596], 1=[array_4, v_prenex_593, v_prenex_595, v_prenex_597]} [2021-03-10 21:52:58,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:52:58,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:58,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:52:58,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:58,865 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-03-10 21:52:58,867 INFO L628 ElimStorePlain]: treesize reduction 85, result has 61.2 percent of original size [2021-03-10 21:52:58,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:58,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:59,172 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:52:59,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:59,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:52:59,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:59,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:52:59,199 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:59,395 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 21:52:59,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:59,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:52:59,410 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:52:59,584 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:52:59,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:59,585 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:52:59,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:59,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:52:59,608 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:59,809 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:52:59,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:52:59,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:59,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:59,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:52:59,836 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:52:59,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:52:59,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:52:59,860 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:00,061 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:53:00,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:00,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:00,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:53:00,086 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:00,277 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:53:00,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:00,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:53:00,288 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:233, output treesize:48 [2021-03-10 21:53:00,517 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 21:53:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:00,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:00,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:53:00,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176846698] [2021-03-10 21:53:00,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:53:00,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:00,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:53:00,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:53:00,580 INFO L87 Difference]: Start difference. First operand 382 states and 1205 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:01,078 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-03-10 21:53:01,553 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-03-10 21:53:02,127 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-03-10 21:53:02,484 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 21:53:03,051 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-03-10 21:53:03,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:03,432 INFO L93 Difference]: Finished difference Result 439 states and 1359 transitions. [2021-03-10 21:53:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:53:03,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:53:03,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:03,437 INFO L225 Difference]: With dead ends: 439 [2021-03-10 21:53:03,437 INFO L226 Difference]: Without dead ends: 429 [2021-03-10 21:53:03,437 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 4069.5ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:53:03,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-03-10 21:53:03,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 381. [2021-03-10 21:53:03,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.1605263157894736) internal successors, (1201), 380 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:03,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1201 transitions. [2021-03-10 21:53:03,442 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1201 transitions. Word has length 17 [2021-03-10 21:53:03,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:03,442 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 1201 transitions. [2021-03-10 21:53:03,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:03,442 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1201 transitions. [2021-03-10 21:53:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:03,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:03,442 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:03,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2378 [2021-03-10 21:53:03,643 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:03,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1455215452, now seen corresponding path program 88 times [2021-03-10 21:53:03,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:03,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454877000] [2021-03-10 21:53:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:03,952 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 21:53:04,302 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 21:53:04,638 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 21:53:04,940 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-10 21:53:05,179 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-10 21:53:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:05,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454877000] [2021-03-10 21:53:05,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794947966] [2021-03-10 21:53:05,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:05,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:53:05,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:05,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:53:05,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:05,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:05,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:05,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:05,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:05,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:05,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:05,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:05,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:05,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:05,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:53:05,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:06,103 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:53:06,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:06,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:53:06,109 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:193, output treesize:163 [2021-03-10 21:53:06,508 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:53:07,027 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 21:53:07,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:07,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:07,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:07,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:07,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:07,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:07,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:53:07,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:07,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:07,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:07,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:07,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:07,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:07,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:07,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:08,078 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-03-10 21:53:08,080 INFO L628 ElimStorePlain]: treesize reduction 180, result has 44.8 percent of original size [2021-03-10 21:53:08,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:08,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:53:08,103 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:08,344 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:53:08,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:08,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:08,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:08,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:53:08,366 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:08,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:08,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:08,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:53:08,383 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:08,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:08,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:53:08,397 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:08,607 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:53:08,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:08,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:08,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:08,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:53:08,630 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:08,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:08,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:08,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:53:08,651 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:08,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:08,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:08,673 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:08,883 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:53:08,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:08,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 21:53:08,890 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:364, output treesize:62 [2021-03-10 21:53:09,154 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2021-03-10 21:53:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:09,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:09,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-10 21:53:09,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264123247] [2021-03-10 21:53:09,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:53:09,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:09,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:53:09,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:53:09,197 INFO L87 Difference]: Start difference. First operand 381 states and 1201 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:10,458 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-03-10 21:53:11,567 WARN L205 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-03-10 21:53:13,324 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2021-03-10 21:53:13,586 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:53:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:14,147 INFO L93 Difference]: Finished difference Result 445 states and 1377 transitions. [2021-03-10 21:53:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:53:14,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:53:14,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:14,152 INFO L225 Difference]: With dead ends: 445 [2021-03-10 21:53:14,152 INFO L226 Difference]: Without dead ends: 435 [2021-03-10 21:53:14,152 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 6240.1ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-03-10 21:53:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 383. [2021-03-10 21:53:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.1596858638743455) internal successors, (1207), 382 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1207 transitions. [2021-03-10 21:53:14,157 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1207 transitions. Word has length 17 [2021-03-10 21:53:14,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:14,157 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 1207 transitions. [2021-03-10 21:53:14,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1207 transitions. [2021-03-10 21:53:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:14,157 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:14,157 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:14,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2411,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:14,358 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:14,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:14,358 INFO L82 PathProgramCache]: Analyzing trace with hash 640409298, now seen corresponding path program 89 times [2021-03-10 21:53:14,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:14,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807697037] [2021-03-10 21:53:14,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:14,644 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-03-10 21:53:15,002 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-03-10 21:53:15,505 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 21:53:15,925 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 21:53:16,334 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 21:53:16,553 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 21:53:16,809 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 21:53:17,041 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 21:53:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:17,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807697037] [2021-03-10 21:53:17,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416062985] [2021-03-10 21:53:17,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:17,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:53:17,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:17,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:53:17,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:17,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:17,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:17,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:17,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:17,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:17,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:53:17,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,027 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:53:18,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:18,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:18,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:18,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:18,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:18,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:18,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,247 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 21:53:18,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:18,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:18,262 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:139, output treesize:109 [2021-03-10 21:53:18,500 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:53:18,875 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_605, v_prenex_607, v_prenex_609], 1=[v_prenex_606, array_2, v_prenex_608, v_prenex_610]} [2021-03-10 21:53:18,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:53:18,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:18,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:18,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:19,541 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-03-10 21:53:19,543 INFO L628 ElimStorePlain]: treesize reduction 89, result has 63.1 percent of original size [2021-03-10 21:53:19,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:53:19,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:19,783 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 21:53:19,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:19,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:53:19,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:20,028 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:53:20,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:20,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:53:20,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:20,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:53:20,066 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:20,287 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 21:53:20,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:20,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:20,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:53:20,314 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:20,550 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:53:20,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:20,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:20,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:53:20,576 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:20,815 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:53:20,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:20,817 INFO L518 ElimStorePlain]: Eliminatee v_prenex_608 vanished before elimination [2021-03-10 21:53:20,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:20,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:20,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:53:20,846 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:20,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:20,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:53:20,866 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:21,074 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:53:21,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:21,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:53:21,085 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:255, output treesize:50 [2021-03-10 21:53:21,382 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 21:53:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:21,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:21,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-03-10 21:53:21,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833476597] [2021-03-10 21:53:21,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:53:21,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:21,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:53:21,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:53:21,444 INFO L87 Difference]: Start difference. First operand 383 states and 1207 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:22,164 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2021-03-10 21:53:22,714 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 21:53:23,336 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-03-10 21:53:23,778 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 21:53:24,649 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-03-10 21:53:25,207 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 21:53:25,828 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 21:53:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:26,362 INFO L93 Difference]: Finished difference Result 456 states and 1408 transitions. [2021-03-10 21:53:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:53:26,367 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:53:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:26,368 INFO L225 Difference]: With dead ends: 456 [2021-03-10 21:53:26,368 INFO L226 Difference]: Without dead ends: 441 [2021-03-10 21:53:26,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 6592.8ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:53:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-03-10 21:53:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 381. [2021-03-10 21:53:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.1605263157894736) internal successors, (1201), 380 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1201 transitions. [2021-03-10 21:53:26,372 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1201 transitions. Word has length 17 [2021-03-10 21:53:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:26,372 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 1201 transitions. [2021-03-10 21:53:26,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1201 transitions. [2021-03-10 21:53:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:26,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:26,373 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:26,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-03-10 21:53:26,573 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1662308434, now seen corresponding path program 90 times [2021-03-10 21:53:26,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:26,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983814133] [2021-03-10 21:53:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:26,979 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-10 21:53:27,359 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-10 21:53:28,046 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 21:53:28,337 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 21:53:28,678 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 21:53:28,983 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-10 21:53:29,209 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 21:53:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:29,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983814133] [2021-03-10 21:53:29,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011537106] [2021-03-10 21:53:29,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:29,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:53:29,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:29,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:53:29,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:29,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:29,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:29,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:29,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:29,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:29,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:53:29,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:30,131 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:53:30,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:30,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:30,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:30,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:30,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:30,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:30,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:30,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:30,396 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:53:30,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:30,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:30,414 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:139, output treesize:102 [2021-03-10 21:53:30,706 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:53:31,274 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_615, array_0, v_prenex_617, v_prenex_619], 1=[v_prenex_616, v_prenex_618, array_4, v_prenex_620]} [2021-03-10 21:53:31,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:31,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:31,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:53:31,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:31,921 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-03-10 21:53:31,923 INFO L628 ElimStorePlain]: treesize reduction 89, result has 60.1 percent of original size [2021-03-10 21:53:31,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:31,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:32,188 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:53:32,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:32,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:53:32,207 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:32,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:53:32,234 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:32,472 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:53:32,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:32,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:53:32,493 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:32,679 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:53:32,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:32,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:32,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:53:32,699 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:32,901 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:53:32,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:32,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:32,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:32,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:53:32,932 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:32,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:32,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:32,957 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:33,153 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:53:33,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:33,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:33,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:53:33,180 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:33,396 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:53:33,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:33,398 INFO L518 ElimStorePlain]: Eliminatee v_prenex_620 vanished before elimination [2021-03-10 21:53:33,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:53:33,407 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:241, output treesize:48 [2021-03-10 21:53:33,739 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 21:53:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:33,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:33,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-03-10 21:53:33,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156495144] [2021-03-10 21:53:33,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:53:33,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:33,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:53:33,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:53:33,812 INFO L87 Difference]: Start difference. First operand 381 states and 1201 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:34,833 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 21:53:35,517 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-03-10 21:53:36,442 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2021-03-10 21:53:37,450 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 78 [2021-03-10 21:53:38,086 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-10 21:53:38,348 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 4 [2021-03-10 21:53:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:38,789 INFO L93 Difference]: Finished difference Result 463 states and 1415 transitions. [2021-03-10 21:53:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:53:38,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:53:38,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:38,795 INFO L225 Difference]: With dead ends: 463 [2021-03-10 21:53:38,795 INFO L226 Difference]: Without dead ends: 431 [2021-03-10 21:53:38,795 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 6492.2ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:53:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-03-10 21:53:38,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 383. [2021-03-10 21:53:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.1596858638743455) internal successors, (1207), 382 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1207 transitions. [2021-03-10 21:53:38,799 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1207 transitions. Word has length 17 [2021-03-10 21:53:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:38,799 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 1207 transitions. [2021-03-10 21:53:38,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1207 transitions. [2021-03-10 21:53:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:38,800 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:38,800 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:39,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2457 [2021-03-10 21:53:39,000 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:39,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:39,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2004891946, now seen corresponding path program 91 times [2021-03-10 21:53:39,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:39,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57869403] [2021-03-10 21:53:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:39,218 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-03-10 21:53:39,418 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-10 21:53:39,722 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 21:53:40,255 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-10 21:53:40,692 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 21:53:41,151 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-10 21:53:41,429 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-03-10 21:53:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:41,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57869403] [2021-03-10 21:53:41,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882196838] [2021-03-10 21:53:41,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:41,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:53:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:42,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:42,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:42,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:42,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:42,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:42,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:42,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:42,381 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:53:42,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:42,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:42,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:42,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:42,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:42,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:42,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:53:42,426 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:42,644 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:53:42,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:42,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:53:42,662 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:148, output treesize:116 [2021-03-10 21:53:42,921 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 21:53:43,338 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_625, array_0, v_prenex_627, v_prenex_629], 1=[v_prenex_626, v_prenex_628, array_2, v_prenex_630]} [2021-03-10 21:53:43,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:43,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:43,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:43,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:43,955 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-03-10 21:53:43,957 INFO L628 ElimStorePlain]: treesize reduction 99, result has 61.0 percent of original size [2021-03-10 21:53:43,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:53:43,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:44,204 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:53:44,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:44,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:44,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:44,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:53:44,239 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:44,488 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 21:53:44,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:44,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:53:44,507 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:44,729 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:53:44,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:44,731 INFO L518 ElimStorePlain]: Eliminatee v_prenex_626 vanished before elimination [2021-03-10 21:53:44,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:44,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:44,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:44,758 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:44,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:44,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:53:44,783 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:44,945 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:53:44,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:44,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:44,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:53:44,965 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:45,170 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:53:45,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:45,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:45,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:53:45,196 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:45,404 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 21:53:45,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:45,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:53:45,414 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:268, output treesize:48 [2021-03-10 21:53:45,741 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 21:53:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:45,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:45,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:53:45,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844278623] [2021-03-10 21:53:45,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:53:45,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:45,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:53:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:53:45,844 INFO L87 Difference]: Start difference. First operand 383 states and 1207 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:46,491 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-10 21:53:46,917 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 21:53:47,456 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-03-10 21:53:48,705 WARN L205 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2021-03-10 21:53:49,431 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-10 21:53:50,273 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-03-10 21:53:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:53:50,730 INFO L93 Difference]: Finished difference Result 435 states and 1349 transitions. [2021-03-10 21:53:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:53:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:53:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:53:50,736 INFO L225 Difference]: With dead ends: 435 [2021-03-10 21:53:50,736 INFO L226 Difference]: Without dead ends: 424 [2021-03-10 21:53:50,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 6187.3ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:53:50,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-03-10 21:53:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 382. [2021-03-10 21:53:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.1627296587926508) internal successors, (1205), 381 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1205 transitions. [2021-03-10 21:53:50,741 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1205 transitions. Word has length 17 [2021-03-10 21:53:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:53:50,741 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1205 transitions. [2021-03-10 21:53:50,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1205 transitions. [2021-03-10 21:53:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:53:50,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:53:50,741 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:53:50,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2482,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:50,942 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:53:50,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:53:50,942 INFO L82 PathProgramCache]: Analyzing trace with hash 569417172, now seen corresponding path program 92 times [2021-03-10 21:53:50,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:53:50,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311690492] [2021-03-10 21:53:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:53:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:53:51,125 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-03-10 21:53:51,379 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 21:53:51,643 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 21:53:52,152 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-10 21:53:52,512 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-10 21:53:52,858 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-10 21:53:53,122 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2021-03-10 21:53:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:53,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311690492] [2021-03-10 21:53:53,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518451856] [2021-03-10 21:53:53,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:53:53,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:53:53,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:53:53,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:53:53,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:53:53,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:53:53,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:53,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:53,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:53,962 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 21:53:53,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:53,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:53,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:53,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:53:53,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:54,198 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 21:53:54,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:54,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:53:54,204 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:127, output treesize:93 [2021-03-10 21:53:54,482 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 21:53:55,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:55,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:53:55,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:55,783 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-03-10 21:53:55,785 INFO L628 ElimStorePlain]: treesize reduction 115, result has 47.7 percent of original size [2021-03-10 21:53:55,785 INFO L518 ElimStorePlain]: Eliminatee v_prenex_636 vanished before elimination [2021-03-10 21:53:55,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:55,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:55,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:55,925 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:53:55,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:55,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:55,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:53:55,952 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:56,124 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:53:56,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:56,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:56,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:53:56,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:56,320 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:53:56,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:56,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:56,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:53:56,340 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:56,501 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:53:56,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:56,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:56,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:53:56,521 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:53:56,674 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:53:56,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:56,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:53:56,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:53:56,700 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:53:56,847 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:53:56,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:53:56,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:53:56,858 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:227, output treesize:38 [2021-03-10 21:53:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:53:57,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:53:57,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:53:57,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706367078] [2021-03-10 21:53:57,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:53:57,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:53:57,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:53:57,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:53:57,073 INFO L87 Difference]: Start difference. First operand 382 states and 1205 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:53:58,021 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-10 21:53:58,397 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-10 21:53:58,906 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:53:59,526 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-03-10 21:54:00,859 WARN L205 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2021-03-10 21:54:02,319 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 119 DAG size of output: 79 [2021-03-10 21:54:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:02,905 INFO L93 Difference]: Finished difference Result 460 states and 1420 transitions. [2021-03-10 21:54:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:54:02,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:54:02,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:02,911 INFO L225 Difference]: With dead ends: 460 [2021-03-10 21:54:02,911 INFO L226 Difference]: Without dead ends: 450 [2021-03-10 21:54:02,911 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 6755.5ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:02,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-03-10 21:54:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 384. [2021-03-10 21:54:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.156657963446475) internal successors, (1209), 383 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1209 transitions. [2021-03-10 21:54:02,916 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1209 transitions. Word has length 17 [2021-03-10 21:54:02,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:02,916 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1209 transitions. [2021-03-10 21:54:02,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:02,916 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1209 transitions. [2021-03-10 21:54:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:02,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:02,916 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:03,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2507,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:03,117 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:03,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:03,117 INFO L82 PathProgramCache]: Analyzing trace with hash -245388982, now seen corresponding path program 93 times [2021-03-10 21:54:03,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:03,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104049342] [2021-03-10 21:54:03,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:03,288 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-03-10 21:54:03,527 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 21:54:03,784 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 21:54:04,029 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:54:04,222 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-03-10 21:54:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:04,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104049342] [2021-03-10 21:54:04,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569183656] [2021-03-10 21:54:04,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:04,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:54:04,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:04,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:54:04,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:05,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:54:05,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:05,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:05,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:05,350 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:54:05,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:05,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:54:05,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:05,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:05,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:05,570 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 21:54:05,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:05,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:05,583 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:139, output treesize:103 [2021-03-10 21:54:05,835 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:54:06,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:06,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:06,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:06,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:06,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:06,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:54:06,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:06,812 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-03-10 21:54:06,814 INFO L628 ElimStorePlain]: treesize reduction 109, result has 45.5 percent of original size [2021-03-10 21:54:06,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:06,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:06,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:06,994 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:54:06,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:07,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:07,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:07,021 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:07,175 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:54:07,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:07,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:07,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:07,191 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:07,310 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:54:07,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:07,312 INFO L518 ElimStorePlain]: Eliminatee v_prenex_649 vanished before elimination [2021-03-10 21:54:07,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:07,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:07,336 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:07,481 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:54:07,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:07,483 INFO L518 ElimStorePlain]: Eliminatee v_prenex_650 vanished before elimination [2021-03-10 21:54:07,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:07,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:54:07,507 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:07,650 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:54:07,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:07,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:54:07,660 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:223, output treesize:38 [2021-03-10 21:54:07,835 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-03-10 21:54:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:07,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:07,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 21:54:07,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954610737] [2021-03-10 21:54:07,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:54:07,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:07,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:54:07,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:54:07,928 INFO L87 Difference]: Start difference. First operand 384 states and 1209 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:08,778 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 21:54:09,046 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:54:09,464 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 21:54:10,108 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-03-10 21:54:11,083 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-03-10 21:54:11,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:11,405 INFO L93 Difference]: Finished difference Result 457 states and 1412 transitions. [2021-03-10 21:54:11,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:54:11,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:54:11,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:11,412 INFO L225 Difference]: With dead ends: 457 [2021-03-10 21:54:11,412 INFO L226 Difference]: Without dead ends: 446 [2021-03-10 21:54:11,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3999.1ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:11,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-03-10 21:54:11,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 382. [2021-03-10 21:54:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.15748031496063) internal successors, (1203), 381 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1203 transitions. [2021-03-10 21:54:11,416 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1203 transitions. Word has length 17 [2021-03-10 21:54:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:11,416 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1203 transitions. [2021-03-10 21:54:11,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1203 transitions. [2021-03-10 21:54:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:11,417 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:11,417 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:11,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2548 [2021-03-10 21:54:11,618 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:11,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:11,618 INFO L82 PathProgramCache]: Analyzing trace with hash 344982116, now seen corresponding path program 94 times [2021-03-10 21:54:11,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:11,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363355335] [2021-03-10 21:54:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:11,807 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-10 21:54:12,341 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 21:54:12,689 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 21:54:13,041 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 21:54:13,410 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 21:54:13,698 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 21:54:14,037 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-10 21:54:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:14,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363355335] [2021-03-10 21:54:14,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137609311] [2021-03-10 21:54:14,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:14,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:54:14,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:14,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:54:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:14,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:14,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:14,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:54:14,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:14,817 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:54:14,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:14,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:54:14,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:14,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:14,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:15,090 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 21:54:15,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:15,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:15,110 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:147, output treesize:117 [2021-03-10 21:54:15,356 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:54:15,737 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-10 21:54:16,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:54:16,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:16,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:16,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:54:16,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:16,120 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:54:16,141 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:54:16,161 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:16,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:16,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:54:16,178 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:17,188 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-03-10 21:54:17,190 INFO L628 ElimStorePlain]: treesize reduction 131, result has 56.8 percent of original size [2021-03-10 21:54:17,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:17,220 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:17,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:54:17,244 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:17,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:17,271 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:17,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:17,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:54:17,289 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:17,610 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 21:54:17,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:17,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:54:17,622 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:385, output treesize:101 [2021-03-10 21:54:18,016 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:54:18,389 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2021-03-10 21:54:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:18,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:18,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-03-10 21:54:18,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587359384] [2021-03-10 21:54:18,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:54:18,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:18,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:54:18,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:54:18,462 INFO L87 Difference]: Start difference. First operand 382 states and 1203 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:19,343 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-10 21:54:19,837 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 21:54:20,425 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2021-03-10 21:54:21,343 WARN L205 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-03-10 21:54:22,601 WARN L205 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 85 [2021-03-10 21:54:24,430 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 114 DAG size of output: 102 [2021-03-10 21:54:26,109 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 117 DAG size of output: 102 [2021-03-10 21:54:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:26,573 INFO L93 Difference]: Finished difference Result 498 states and 1530 transitions. [2021-03-10 21:54:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:54:26,578 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:54:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:26,579 INFO L225 Difference]: With dead ends: 498 [2021-03-10 21:54:26,579 INFO L226 Difference]: Without dead ends: 486 [2021-03-10 21:54:26,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 9436.2ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:54:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-03-10 21:54:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 380. [2021-03-10 21:54:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.158311345646438) internal successors, (1197), 379 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1197 transitions. [2021-03-10 21:54:26,584 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1197 transitions. Word has length 17 [2021-03-10 21:54:26,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:26,584 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 1197 transitions. [2021-03-10 21:54:26,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:26,584 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1197 transitions. [2021-03-10 21:54:26,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:26,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:26,584 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:26,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2579,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:26,785 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:26,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:26,785 INFO L82 PathProgramCache]: Analyzing trace with hash -109288126, now seen corresponding path program 95 times [2021-03-10 21:54:26,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:26,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930581583] [2021-03-10 21:54:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:26,994 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-03-10 21:54:27,288 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 21:54:27,663 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 21:54:28,061 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 21:54:28,349 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-10 21:54:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:28,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930581583] [2021-03-10 21:54:28,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142302352] [2021-03-10 21:54:28,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:28,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:54:28,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:28,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:54:28,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:29,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:29,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:29,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:29,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:29,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:29,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:54:29,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:29,512 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 21:54:29,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:29,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:29,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:29,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:54:29,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:29,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:29,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:29,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:29,786 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:54:29,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:29,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:29,807 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:139, output treesize:98 [2021-03-10 21:54:30,107 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:54:30,720 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_659, array_0, v_prenex_661, v_prenex_663], 1=[array_4, v_prenex_660, v_prenex_662, v_prenex_664]} [2021-03-10 21:54:30,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:30,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:30,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:54:30,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:31,481 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-03-10 21:54:31,483 INFO L628 ElimStorePlain]: treesize reduction 85, result has 61.2 percent of original size [2021-03-10 21:54:31,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:54:31,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:31,724 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:54:31,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:31,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:31,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:32,027 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 21:54:32,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:32,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:54:32,047 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:32,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:54:32,066 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:32,304 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:54:32,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:32,306 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:54:32,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:32,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:32,333 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:32,572 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:54:32,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:32,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:32,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:32,601 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:32,839 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:54:32,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:32,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:32,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:32,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:54:32,871 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:32,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:32,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:32,897 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:33,094 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:54:33,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:33,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:54:33,104 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:233, output treesize:48 [2021-03-10 21:54:33,423 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-03-10 21:54:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:33,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:33,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:54:33,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431070284] [2021-03-10 21:54:33,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:54:33,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:33,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:54:33,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:54:33,503 INFO L87 Difference]: Start difference. First operand 380 states and 1197 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:34,460 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 21:54:34,977 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 21:54:35,722 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-03-10 21:54:37,057 WARN L205 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2021-03-10 21:54:38,517 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 106 DAG size of output: 93 [2021-03-10 21:54:39,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:39,236 INFO L93 Difference]: Finished difference Result 463 states and 1434 transitions. [2021-03-10 21:54:39,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:54:39,242 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:54:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:39,243 INFO L225 Difference]: With dead ends: 463 [2021-03-10 21:54:39,243 INFO L226 Difference]: Without dead ends: 453 [2021-03-10 21:54:39,243 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 6128.3ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:54:39,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-03-10 21:54:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 384. [2021-03-10 21:54:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.156657963446475) internal successors, (1209), 383 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:39,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1209 transitions. [2021-03-10 21:54:39,247 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1209 transitions. Word has length 17 [2021-03-10 21:54:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:39,247 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1209 transitions. [2021-03-10 21:54:39,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:39,248 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1209 transitions. [2021-03-10 21:54:39,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:39,248 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:39,248 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:39,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2602 [2021-03-10 21:54:39,449 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:39,449 INFO L82 PathProgramCache]: Analyzing trace with hash 233295386, now seen corresponding path program 96 times [2021-03-10 21:54:39,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:39,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953564188] [2021-03-10 21:54:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:39,849 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 21:54:40,100 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 21:54:40,383 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-10 21:54:40,544 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-03-10 21:54:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:40,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953564188] [2021-03-10 21:54:40,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217965366] [2021-03-10 21:54:40,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:40,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:54:40,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:54:40,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:54:40,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:40,965 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 21:54:41,253 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:54:41,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:41,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:41,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:54:41,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:41,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:41,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:41,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:41,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:41,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:41,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:41,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:41,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:41,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:41,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:54:41,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:41,963 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:54:41,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:41,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:41,983 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:205, output treesize:171 [2021-03-10 21:54:42,424 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 21:54:43,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:43,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:54:43,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:43,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:43,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:44,306 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-03-10 21:54:44,308 INFO L628 ElimStorePlain]: treesize reduction 154, result has 57.0 percent of original size [2021-03-10 21:54:44,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:44,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:54:44,335 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:44,891 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 21:54:44,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:44,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:44,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:54:44,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:44,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:54:44,934 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:45,437 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 21:54:45,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:45,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:45,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:45,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:54:45,464 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:45,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:45,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:54:45,486 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:45,857 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 21:54:45,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:45,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:54:45,878 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:46,305 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 21:54:46,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:46,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:46,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:54:46,334 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:46,748 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 21:54:46,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:46,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:54:46,770 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:47,185 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:54:47,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:47,187 INFO L518 ElimStorePlain]: Eliminatee v_prenex_673 vanished before elimination [2021-03-10 21:54:47,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:54:47,197 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:379, output treesize:101 [2021-03-10 21:54:47,518 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:54:47,924 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 21:54:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:47,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:47,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:54:47,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125275343] [2021-03-10 21:54:47,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:54:47,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:47,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:54:47,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:54:47,993 INFO L87 Difference]: Start difference. First operand 384 states and 1209 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:48,616 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:54:49,160 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 21:54:50,154 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-03-10 21:54:51,524 WARN L205 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-03-10 21:54:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:54:52,158 INFO L93 Difference]: Finished difference Result 461 states and 1428 transitions. [2021-03-10 21:54:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:54:52,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:54:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:54:52,165 INFO L225 Difference]: With dead ends: 461 [2021-03-10 21:54:52,165 INFO L226 Difference]: Without dead ends: 450 [2021-03-10 21:54:52,165 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 5030.4ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:54:52,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-03-10 21:54:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 382. [2021-03-10 21:54:52,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.15748031496063) internal successors, (1203), 381 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1203 transitions. [2021-03-10 21:54:52,169 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1203 transitions. Word has length 17 [2021-03-10 21:54:52,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:54:52,169 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1203 transitions. [2021-03-10 21:54:52,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1203 transitions. [2021-03-10 21:54:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:54:52,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:54:52,170 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:54:52,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2627,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:52,371 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:54:52,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:54:52,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1873488734, now seen corresponding path program 97 times [2021-03-10 21:54:52,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:54:52,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625122117] [2021-03-10 21:54:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:54:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:52,613 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-10 21:54:52,855 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 21:54:53,220 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 21:54:53,598 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 21:54:53,786 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-03-10 21:54:53,953 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2021-03-10 21:54:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:53,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625122117] [2021-03-10 21:54:53,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910924472] [2021-03-10 21:54:53,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:54:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:54:53,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:54:53,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:54:54,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:54,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:54,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:54:54,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:54,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:54,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:54,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:54,732 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 21:54:54,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:54,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:54,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:54,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:54,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:54,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:54,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:54:54,777 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:54,982 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:54:54,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:55,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:54:55,002 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:130, output treesize:104 [2021-03-10 21:54:55,485 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:54:55,867 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_680, v_prenex_682, v_prenex_678], 1=[v_prenex_679, array_2, v_prenex_681, v_prenex_683]} [2021-03-10 21:54:55,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:54:55,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:55,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:54:55,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:56,594 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-03-10 21:54:56,595 INFO L628 ElimStorePlain]: treesize reduction 93, result has 62.8 percent of original size [2021-03-10 21:54:56,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:54:56,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:56,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:54:56,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:56,869 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 21:54:56,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:56,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:54:56,889 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:57,119 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 21:54:57,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:57,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:54:57,139 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:57,371 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 21:54:57,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:57,373 INFO L518 ElimStorePlain]: Eliminatee v_prenex_679 vanished before elimination [2021-03-10 21:54:57,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:57,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:54:57,394 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:57,632 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:54:57,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:57,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:57,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:57,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:54:57,664 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:54:57,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:57,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:54:57,685 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:57,917 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:54:57,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:57,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:54:57,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:54:57,937 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:54:58,177 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:54:58,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:54:58,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:54:58,189 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:263, output treesize:48 [2021-03-10 21:54:58,519 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-10 21:54:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:54:58,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:54:58,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 21:54:58,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407121809] [2021-03-10 21:54:58,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:54:58,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:54:58,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:54:58,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:54:58,633 INFO L87 Difference]: Start difference. First operand 382 states and 1203 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:54:59,639 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 21:55:00,114 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 21:55:00,767 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-03-10 21:55:02,529 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2021-03-10 21:55:03,933 WARN L205 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-03-10 21:55:05,094 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-03-10 21:55:05,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:05,437 INFO L93 Difference]: Finished difference Result 506 states and 1558 transitions. [2021-03-10 21:55:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:55:05,443 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:55:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:05,444 INFO L225 Difference]: With dead ends: 506 [2021-03-10 21:55:05,444 INFO L226 Difference]: Without dead ends: 494 [2021-03-10 21:55:05,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 7102.1ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:55:05,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-03-10 21:55:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 380. [2021-03-10 21:55:05,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.158311345646438) internal successors, (1197), 379 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1197 transitions. [2021-03-10 21:55:05,449 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1197 transitions. Word has length 17 [2021-03-10 21:55:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:05,449 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 1197 transitions. [2021-03-10 21:55:05,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1197 transitions. [2021-03-10 21:55:05,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:05,450 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:05,450 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:05,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2662 [2021-03-10 21:55:05,651 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:05,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:05,651 INFO L82 PathProgramCache]: Analyzing trace with hash -684833076, now seen corresponding path program 98 times [2021-03-10 21:55:05,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:05,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989856187] [2021-03-10 21:55:05,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:05,939 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 21:55:06,231 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 21:55:06,562 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-10 21:55:06,866 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:55:07,184 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 21:55:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:07,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989856187] [2021-03-10 21:55:07,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374642486] [2021-03-10 21:55:07,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:07,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:55:07,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:07,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:55:07,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:07,618 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 21:55:07,860 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 21:55:07,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:07,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:07,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:55:07,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:07,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:07,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:07,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:55:07,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:07,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:07,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:07,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:55:07,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:07,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:07,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:07,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:08,304 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:55:08,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:08,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:55:08,310 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:173, output treesize:142 [2021-03-10 21:55:08,754 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:55:09,276 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:55:09,474 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_684, v_prenex_686, v_prenex_688], 1=[array_4, v_prenex_685, v_prenex_687, v_prenex_689]} [2021-03-10 21:55:09,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:09,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:09,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:55:09,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:10,670 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-03-10 21:55:10,672 INFO L628 ElimStorePlain]: treesize reduction 162, result has 55.1 percent of original size [2021-03-10 21:55:10,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:55:10,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:11,260 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 21:55:11,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:11,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:55:11,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:11,808 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 21:55:11,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:11,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:11,831 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:11,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:55:11,852 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:12,333 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:55:12,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:12,335 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:55:12,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:12,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:55:12,353 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:12,836 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 21:55:12,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:12,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:12,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:55:12,863 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:13,378 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:55:13,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:13,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:13,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:13,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:55:13,405 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:13,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:13,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:55:13,434 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:13,825 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:55:13,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:13,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:55:13,831 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 8 variables, input treesize:379, output treesize:125 [2021-03-10 21:55:14,353 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:55:14,858 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2021-03-10 21:55:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:14,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:14,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:55:14,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907627048] [2021-03-10 21:55:14,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:55:14,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:14,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:55:14,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:55:14,889 INFO L87 Difference]: Start difference. First operand 380 states and 1197 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:15,638 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 21:55:16,341 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-03-10 21:55:17,996 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-03-10 21:55:19,711 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-03-10 21:55:21,700 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2021-03-10 21:55:24,238 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-03-10 21:55:26,800 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2021-03-10 21:55:29,370 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 106 DAG size of output: 83 [2021-03-10 21:55:30,224 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 21:55:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:30,818 INFO L93 Difference]: Finished difference Result 567 states and 1753 transitions. [2021-03-10 21:55:30,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:55:30,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:55:30,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:30,825 INFO L225 Difference]: With dead ends: 567 [2021-03-10 21:55:30,825 INFO L226 Difference]: Without dead ends: 551 [2021-03-10 21:55:30,825 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 16893.1ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:55:30,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-03-10 21:55:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 384. [2021-03-10 21:55:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.156657963446475) internal successors, (1209), 383 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1209 transitions. [2021-03-10 21:55:30,831 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1209 transitions. Word has length 17 [2021-03-10 21:55:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:30,831 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1209 transitions. [2021-03-10 21:55:30,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1209 transitions. [2021-03-10 21:55:30,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:30,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:30,831 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:31,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2687,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:31,032 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:31,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:31,032 INFO L82 PathProgramCache]: Analyzing trace with hash 590115602, now seen corresponding path program 99 times [2021-03-10 21:55:31,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:31,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331582087] [2021-03-10 21:55:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:31,398 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 21:55:31,821 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-10 21:55:32,260 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 21:55:32,684 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-10 21:55:33,080 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-10 21:55:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:33,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331582087] [2021-03-10 21:55:33,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510217634] [2021-03-10 21:55:33,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:33,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:55:33,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:55:33,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:33,540 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 21:55:33,820 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 21:55:34,133 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 21:55:34,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:34,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:34,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:55:34,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:34,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:34,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:34,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:55:34,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:34,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:34,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:34,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:55:34,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:34,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:34,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:34,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:34,730 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:55:34,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:34,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:55:34,737 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:217, output treesize:186 [2021-03-10 21:55:35,234 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:55:35,370 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_690, v_prenex_692, v_prenex_694], 1=[v_prenex_691, array_4, v_prenex_693, v_prenex_695]} [2021-03-10 21:55:35,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:55:35,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:35,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:35,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:36,699 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-03-10 21:55:36,701 INFO L628 ElimStorePlain]: treesize reduction 181, result has 55.3 percent of original size [2021-03-10 21:55:36,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:55:36,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:37,190 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 21:55:37,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:37,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:55:37,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:38,195 WARN L205 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-03-10 21:55:38,197 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.2 percent of original size [2021-03-10 21:55:38,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:55:38,217 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:38,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:55:38,237 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:38,679 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 21:55:38,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:38,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:38,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:55:38,703 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:39,154 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 21:55:39,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:39,156 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-03-10 21:55:39,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:39,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:39,186 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:39,663 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:55:39,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:39,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:39,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:39,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:55:39,698 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:39,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:39,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-03-10 21:55:39,721 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:40,165 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 21:55:40,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:40,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:55:40,172 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 8 variables, input treesize:419, output treesize:148 [2021-03-10 21:55:40,728 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 21:55:41,275 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 17 [2021-03-10 21:55:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:41,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:55:41,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:55:41,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674264222] [2021-03-10 21:55:41,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:55:41,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:55:41,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:55:41,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:55:41,316 INFO L87 Difference]: Start difference. First operand 384 states and 1209 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:42,088 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 21:55:42,902 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-03-10 21:55:43,926 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2021-03-10 21:55:45,775 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-03-10 21:55:47,636 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2021-03-10 21:55:49,006 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-03-10 21:55:49,949 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-10 21:55:50,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:55:50,226 INFO L93 Difference]: Finished difference Result 512 states and 1592 transitions. [2021-03-10 21:55:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:55:50,233 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:55:50,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:55:50,234 INFO L225 Difference]: With dead ends: 512 [2021-03-10 21:55:50,234 INFO L226 Difference]: Without dead ends: 498 [2021-03-10 21:55:50,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 11053.0ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:55:50,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-03-10 21:55:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 386. [2021-03-10 21:55:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.155844155844156) internal successors, (1215), 385 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1215 transitions. [2021-03-10 21:55:50,239 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1215 transitions. Word has length 17 [2021-03-10 21:55:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:55:50,239 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 1215 transitions. [2021-03-10 21:55:50,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:55:50,240 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1215 transitions. [2021-03-10 21:55:50,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:55:50,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:55:50,240 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:55:50,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2706,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:50,441 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:55:50,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:55:50,441 INFO L82 PathProgramCache]: Analyzing trace with hash 932699114, now seen corresponding path program 100 times [2021-03-10 21:55:50,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:55:50,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340566066] [2021-03-10 21:55:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:55:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:55:51,088 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 21:55:51,657 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-10 21:55:52,269 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-10 21:55:52,974 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-03-10 21:55:53,779 WARN L205 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-03-10 21:55:54,292 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 21:55:54,631 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2021-03-10 21:55:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:55:54,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340566066] [2021-03-10 21:55:54,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974339849] [2021-03-10 21:55:54,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:55:54,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:55:54,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:55:54,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:55:54,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:55:55,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:55,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:55,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:55,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:55,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:55,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:55:55,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:55,892 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:55:55,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:55,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:55,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:55,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:55:55,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:55,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:55,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:55:55,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:56,201 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:55:56,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:56,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:55:56,223 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:148, output treesize:118 [2021-03-10 21:55:56,505 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 21:55:56,946 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_702, v_prenex_704, array_0, v_prenex_700], 1=[v_prenex_701, v_prenex_703, v_prenex_705, array_2]} [2021-03-10 21:55:56,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:55:56,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:56,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:55:57,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:57,832 WARN L205 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-03-10 21:55:57,834 INFO L628 ElimStorePlain]: treesize reduction 91, result has 64.2 percent of original size [2021-03-10 21:55:57,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:55:57,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:57,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:55:57,877 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:58,192 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:55:58,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:58,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:55:58,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:58,466 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 21:55:58,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:58,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-03-10 21:55:58,488 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:58,740 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:55:58,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:58,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:58,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:58,771 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:59,038 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:55:59,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:59,040 INFO L518 ElimStorePlain]: Eliminatee v_prenex_703 vanished before elimination [2021-03-10 21:55:59,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:59,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:59,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:55:59,074 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:59,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:59,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:55:59,105 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:55:59,361 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 21:55:59,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:59,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:55:59,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:55:59,386 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:55:59,633 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 21:55:59,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:55:59,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:55:59,647 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:272, output treesize:48 [2021-03-10 21:56:00,027 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 21:56:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:00,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:00,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:56:00,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91626259] [2021-03-10 21:56:00,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:56:00,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:00,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:56:00,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:56:00,115 INFO L87 Difference]: Start difference. First operand 386 states and 1215 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:00,812 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 21:56:02,008 WARN L205 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-03-10 21:56:04,248 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 117 DAG size of output: 88 [2021-03-10 21:56:07,453 WARN L205 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 161 DAG size of output: 127 [2021-03-10 21:56:08,897 WARN L205 SmtUtils]: Spent 960.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 77 [2021-03-10 21:56:10,231 WARN L205 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-03-10 21:56:10,760 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 21:56:11,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:11,441 INFO L93 Difference]: Finished difference Result 506 states and 1576 transitions. [2021-03-10 21:56:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:56:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:56:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:11,449 INFO L225 Difference]: With dead ends: 506 [2021-03-10 21:56:11,449 INFO L226 Difference]: Without dead ends: 495 [2021-03-10 21:56:11,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 13369.5ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:56:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-03-10 21:56:11,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 382. [2021-03-10 21:56:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.15748031496063) internal successors, (1203), 381 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1203 transitions. [2021-03-10 21:56:11,454 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1203 transitions. Word has length 17 [2021-03-10 21:56:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:11,454 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1203 transitions. [2021-03-10 21:56:11,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:11,455 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1203 transitions. [2021-03-10 21:56:11,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:56:11,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:11,455 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:11,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2721 [2021-03-10 21:56:11,656 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:11,656 INFO L82 PathProgramCache]: Analyzing trace with hash 2073250540, now seen corresponding path program 101 times [2021-03-10 21:56:11,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:11,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075040401] [2021-03-10 21:56:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:12,072 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 21:56:12,429 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 21:56:12,884 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 21:56:13,398 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-10 21:56:13,809 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-10 21:56:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:13,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075040401] [2021-03-10 21:56:13,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069796919] [2021-03-10 21:56:13,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:13,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:56:13,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:13,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:56:13,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:14,391 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 21:56:14,708 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:56:15,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:15,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:15,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:56:15,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:15,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:15,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-03-10 21:56:15,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:15,601 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 21:56:15,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:15,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:15,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:15,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:56:15,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:15,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:15,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:56:15,655 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:16,036 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 21:56:16,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:16,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:56:16,058 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:180, output treesize:141 [2021-03-10 21:56:16,492 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:56:17,001 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_4]} [2021-03-10 21:56:17,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:17,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-03-10 21:56:17,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:17,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:17,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-03-10 21:56:17,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:17,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:17,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:56:17,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:17,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:17,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:56:17,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:17,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:17,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:17,124 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:17,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:17,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:56:17,149 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:17,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:17,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:56:17,174 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:17,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:56:17,196 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:18,351 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-03-10 21:56:18,353 INFO L628 ElimStorePlain]: treesize reduction 130, result has 56.2 percent of original size [2021-03-10 21:56:18,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:18,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:18,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:56:18,375 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:18,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:18,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:18,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:18,401 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:18,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:18,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:18,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-03-10 21:56:18,427 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:18,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:18,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:18,451 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:18,873 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 21:56:18,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:18,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:56:18,887 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:369, output treesize:101 [2021-03-10 21:56:19,374 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 21:56:19,840 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-10 21:56:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:19,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:19,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:56:19,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660788889] [2021-03-10 21:56:19,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:56:19,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:19,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:56:19,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:56:19,919 INFO L87 Difference]: Start difference. First operand 382 states and 1203 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:20,967 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-10 21:56:21,817 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 37 [2021-03-10 21:56:24,533 WARN L205 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 121 DAG size of output: 105 [2021-03-10 21:56:27,079 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 130 DAG size of output: 105 [2021-03-10 21:56:28,450 WARN L205 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-10 21:56:29,195 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 21:56:29,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:29,509 INFO L93 Difference]: Finished difference Result 509 states and 1581 transitions. [2021-03-10 21:56:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:56:29,514 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:56:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:29,515 INFO L225 Difference]: With dead ends: 509 [2021-03-10 21:56:29,515 INFO L226 Difference]: Without dead ends: 499 [2021-03-10 21:56:29,515 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 10961.1ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:56:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-03-10 21:56:29,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 386. [2021-03-10 21:56:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.155844155844156) internal successors, (1215), 385 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:29,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1215 transitions. [2021-03-10 21:56:29,520 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1215 transitions. Word has length 17 [2021-03-10 21:56:29,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:29,520 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 1215 transitions. [2021-03-10 21:56:29,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:29,520 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1215 transitions. [2021-03-10 21:56:29,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:56:29,521 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:29,521 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:29,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2746,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:29,735 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:29,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:29,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1879133244, now seen corresponding path program 102 times [2021-03-10 21:56:29,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:29,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849805481] [2021-03-10 21:56:29,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:30,428 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 21:56:31,362 WARN L205 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-10 21:56:32,044 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-10 21:56:32,841 WARN L205 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-03-10 21:56:33,691 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-03-10 21:56:34,306 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 21:56:34,589 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2021-03-10 21:56:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:34,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849805481] [2021-03-10 21:56:34,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083712703] [2021-03-10 21:56:34,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:56:34,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:56:34,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:56:34,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:56:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:56:35,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:56:35,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:35,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:56:35,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:35,949 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 21:56:35,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:35,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:56:35,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:35,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:35,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:56:36,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:36,283 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 21:56:36,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:36,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-03-10 21:56:36,306 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:148, output treesize:122 [2021-03-10 21:56:36,607 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 21:56:37,067 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_714, array_0, v_prenex_716, v_prenex_718], 1=[v_prenex_715, v_prenex_717, array_2, v_prenex_719]} [2021-03-10 21:56:37,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-03-10 21:56:37,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:37,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-03-10 21:56:37,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:37,859 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-03-10 21:56:37,861 INFO L628 ElimStorePlain]: treesize reduction 106, result has 59.4 percent of original size [2021-03-10 21:56:37,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:56:37,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:38,169 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-10 21:56:38,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:38,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-03-10 21:56:38,195 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:38,471 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 21:56:38,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:38,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-03-10 21:56:38,494 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:38,755 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 21:56:38,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:38,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:38,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:38,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:56:38,784 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:56:38,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:38,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-03-10 21:56:38,806 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:39,058 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 21:56:39,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:39,061 INFO L518 ElimStorePlain]: Eliminatee v_prenex_717 vanished before elimination [2021-03-10 21:56:39,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:39,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-03-10 21:56:39,085 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:39,359 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 21:56:39,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:39,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:56:39,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 21:56:39,384 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:56:39,662 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:56:39,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:56:39,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:56:39,675 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:280, output treesize:48 [2021-03-10 21:56:40,081 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 21:56:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:56:40,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:56:40,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-10 21:56:40,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939090467] [2021-03-10 21:56:40,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:56:40,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:56:40,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:56:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:56:40,174 INFO L87 Difference]: Start difference. First operand 386 states and 1215 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:40,884 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 21:56:42,115 WARN L205 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-03-10 21:56:44,547 WARN L205 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 149 DAG size of output: 104 [2021-03-10 21:56:47,044 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 137 DAG size of output: 127 [2021-03-10 21:56:48,373 WARN L205 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-03-10 21:56:49,732 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-03-10 21:56:50,361 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 21:56:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:56:51,064 INFO L93 Difference]: Finished difference Result 513 states and 1593 transitions. [2021-03-10 21:56:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:56:51,072 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:56:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:56:51,073 INFO L225 Difference]: With dead ends: 513 [2021-03-10 21:56:51,073 INFO L226 Difference]: Without dead ends: 502 [2021-03-10 21:56:51,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 13762.0ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:56:51,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-03-10 21:56:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 384. [2021-03-10 21:56:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.156657963446475) internal successors, (1209), 383 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:51,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1209 transitions. [2021-03-10 21:56:51,080 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1209 transitions. Word has length 17 [2021-03-10 21:56:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:56:51,080 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1209 transitions. [2021-03-10 21:56:51,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:56:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1209 transitions. [2021-03-10 21:56:51,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:56:51,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:56:51,081 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:56:51,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2769 [2021-03-10 21:56:51,295 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:56:51,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:56:51,295 INFO L82 PathProgramCache]: Analyzing trace with hash 309049932, now seen corresponding path program 103 times [2021-03-10 21:56:51,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:56:51,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132061920] [2021-03-10 21:56:51,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:56:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:56:51,652 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 21:56:51,960 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 Received shutdown request... [2021-03-10 21:56:52,136 WARN L222 SmtUtils]: Removed 6 from assertion stack [2021-03-10 21:56:52,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2794 [2021-03-10 21:56:52,137 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 21:56:52,141 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 21:56:52,141 INFO L202 PluginConnector]: Adding new model array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 09:56:52 BasicIcfg [2021-03-10 21:56:52,141 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 21:56:52,142 INFO L168 Benchmark]: Toolchain (without parser) took 825340.21 ms. Allocated memory was 255.9 MB in the beginning and 507.5 MB in the end (delta: 251.7 MB). Free memory was 236.8 MB in the beginning and 381.3 MB in the end (delta: -144.5 MB). Peak memory consumption was 107.4 MB. Max. memory is 16.0 GB. [2021-03-10 21:56:52,142 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 238.0 MB in the end (delta: 58.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:56:52,142 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.19 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:56:52,142 INFO L168 Benchmark]: Boogie Preprocessor took 32.45 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:56:52,142 INFO L168 Benchmark]: RCFGBuilder took 361.99 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 229.0 MB in the end (delta: 4.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. [2021-03-10 21:56:52,142 INFO L168 Benchmark]: TraceAbstraction took 824906.23 ms. Allocated memory was 255.9 MB in the beginning and 507.5 MB in the end (delta: 251.7 MB). Free memory was 228.5 MB in the beginning and 381.3 MB in the end (delta: -152.8 MB). Peak memory consumption was 98.3 MB. Max. memory is 16.0 GB. [2021-03-10 21:56:52,143 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 238.0 MB in the end (delta: 58.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.19 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 32.45 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 361.99 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 229.0 MB in the end (delta: 4.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 824906.23 ms. Allocated memory was 255.9 MB in the beginning and 507.5 MB in the end (delta: 251.7 MB). Free memory was 228.5 MB in the beginning and 381.3 MB in the end (delta: -152.8 MB). Peak memory consumption was 98.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 92). Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 130ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 824774.0ms, OverallIterations: 332, TraceHistogramMax: 1, EmptinessCheckTime: 146.2ms, AutomataDifference: 385474.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 32.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9676 SDtfs, 21329 SDslu, 36313 SDs, 0 SdLazy, 77486 SolverSat, 2849 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67040.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8276 GetRequests, 3499 SyntacticMatches, 153 SemanticMatches, 4624 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7880 ImplicationChecksByTransitivity, 441344.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=386occurred in iteration=301, InterpolantAutomatonStates: 2977, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1062.9ms AutomataMinimizationTime, 331 MinimizatonAttempts, 24698 StatesRemovedByMinimization, 330 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1160.0ms SsaConstructionTime, 2826.3ms SatisfiabilityAnalysisTime, 376960.5ms InterpolantComputationTime, 9416 NumberOfCodeBlocks, 9416 NumberOfCodeBlocksAsserted, 797 NumberOfCheckSat, 8834 ConstructedInterpolants, 167 QuantifiedInterpolants, 160996 SizeOfPredicates, 1909 NumberOfNonLiveVariables, 16528 ConjunctsInSsa, 4033 ConjunctsInUnsatCore, 582 InterpolantComputations, 80 PerfectInterpolantSequences, 298/1268 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown