/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/unroll-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:23:07,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:23:07,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:23:07,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 21:23:07,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 21:23:07,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 21:23:07,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 21:23:07,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 21:23:07,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 21:23:07,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 21:23:07,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 21:23:07,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 21:23:07,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 21:23:07,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 21:23:07,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 21:23:07,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 21:23:07,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 21:23:07,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 21:23:07,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 21:23:07,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 21:23:07,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 21:23:07,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 21:23:07,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 21:23:07,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 21:23:07,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 21:23:07,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 21:23:07,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 21:23:07,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 21:23:07,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 21:23:07,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-10 21:23:07,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 21:23:07,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 21:23:07,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 21:23:07,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 21:23:07,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 21:23:07,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 21:23:07,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 21:23:07,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 21:23:07,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 21:23:07,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 21:23:07,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 21:23:07,345 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 21:23:07,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:23:07,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:23:07,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:23:07,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:23:07,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:23:07,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:23:07,361 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:23:07,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:23:07,361 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:23:07,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:23:07,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:23:07,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:23:07,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:23:07,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:23:07,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:23:07,362 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:23:07,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:23:07,362 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:23:07,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:23:07,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:23:07,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:23:07,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:23:07,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:23:07,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:23:07,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:23:07,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:23:07,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:23:07,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:23:07,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:23:07,364 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:23:07,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:23:07,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:23:07,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:23:07,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:23:07,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:23:07,581 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:23:07,584 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:23:07,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl [2021-03-10 21:23:07,584 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl' [2021-03-10 21:23:07,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:23:07,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:23:07,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:23:07,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:23:07,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:23:07,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:07" (1/1) ... [2021-03-10 21:23:07,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:07" (1/1) ... [2021-03-10 21:23:07,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:23:07,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:23:07,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:23:07,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:23:07,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:07" (1/1) ... [2021-03-10 21:23:07,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:07" (1/1) ... [2021-03-10 21:23:07,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:07" (1/1) ... [2021-03-10 21:23:07,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:07" (1/1) ... [2021-03-10 21:23:07,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:07" (1/1) ... [2021-03-10 21:23:07,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:07" (1/1) ... [2021-03-10 21:23:07,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:07" (1/1) ... [2021-03-10 21:23:07,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:23:07,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:23:07,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:23:07,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:23:07,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:07" (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 21:23:07,688 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:23:07,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:23:07,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:23:07,688 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:23:07,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:23:07,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:23:07,688 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:23:07,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:23:07,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:23:07,689 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 21:23:07,859 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:23:07,860 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 21:23:07,860 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-10 21:23:07,860 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-03-10 21:23:07,861 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:23:07 BoogieIcfgContainer [2021-03-10 21:23:07,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:23:07,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:23:07,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:23:07,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:23:07,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:07" (1/2) ... [2021-03-10 21:23:07,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d42fc40 and model type unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:23:07, skipping insertion in model container [2021-03-10 21:23:07,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:23:07" (2/2) ... [2021-03-10 21:23:07,865 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.bpl [2021-03-10 21:23:07,869 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:23:07,869 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:23:07,871 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:23:07,871 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:23:07,889 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:23:07,899 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:23:07,911 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:23:07,911 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:23:07,911 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:23:07,911 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:23:07,912 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:23:07,912 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:23:07,912 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:23:07,912 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:23:07,917 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-03-10 21:23:07,922 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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 21:23:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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 21:23:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-03-10 21:23:07,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:07,927 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:07,928 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:07,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:07,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1034851945, now seen corresponding path program 1 times [2021-03-10 21:23:07,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:07,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452716417] [2021-03-10 21:23:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:08,012 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 21:23:08,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452716417] [2021-03-10 21:23:08,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:08,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 21:23:08,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668273752] [2021-03-10 21:23:08,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 21:23:08,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:08,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 21:23:08,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:23:08,025 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:08,038 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-03-10 21:23:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 21:23:08,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-03-10 21:23:08,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:08,044 INFO L225 Difference]: With dead ends: 22 [2021-03-10 21:23:08,044 INFO L226 Difference]: Without dead ends: 19 [2021-03-10 21:23:08,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:23:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-03-10 21:23:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-03-10 21:23:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-03-10 21:23:08,063 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-03-10 21:23:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:08,063 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-03-10 21:23:08,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-03-10 21:23:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:23:08,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:08,064 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:08,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:23:08,065 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:08,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:08,065 INFO L82 PathProgramCache]: Analyzing trace with hash -619637623, now seen corresponding path program 1 times [2021-03-10 21:23:08,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:08,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325846190] [2021-03-10 21:23:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:08,090 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 21:23:08,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325846190] [2021-03-10 21:23:08,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245796650] [2021-03-10 21:23:08,091 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 21:23:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:08,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 21:23:08,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:08,164 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 21:23:08,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:08,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-03-10 21:23:08,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934657535] [2021-03-10 21:23:08,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:23:08,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:08,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:23:08,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:23:08,169 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:08,216 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-03-10 21:23:08,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:23:08,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-10 21:23:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:08,218 INFO L225 Difference]: With dead ends: 28 [2021-03-10 21:23:08,218 INFO L226 Difference]: Without dead ends: 28 [2021-03-10 21:23:08,219 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:23:08,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-03-10 21:23:08,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-03-10 21:23:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-03-10 21:23:08,226 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-03-10 21:23:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:08,227 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-03-10 21:23:08,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-03-10 21:23:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:23:08,228 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:08,228 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:08,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 21:23:08,440 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:08,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2038710898, now seen corresponding path program 1 times [2021-03-10 21:23:08,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:08,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172527988] [2021-03-10 21:23:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:08,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172527988] [2021-03-10 21:23:08,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:08,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:23:08,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775514650] [2021-03-10 21:23:08,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:23:08,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:08,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:23:08,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:23:08,465 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:08,505 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-03-10 21:23:08,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:23:08,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-10 21:23:08,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:08,506 INFO L225 Difference]: With dead ends: 22 [2021-03-10 21:23:08,506 INFO L226 Difference]: Without dead ends: 18 [2021-03-10 21:23:08,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:23:08,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-03-10 21:23:08,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-03-10 21:23:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-03-10 21:23:08,508 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-03-10 21:23:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:08,508 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-03-10 21:23:08,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-03-10 21:23:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:23:08,509 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:08,509 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:08,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:23:08,509 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash 298365290, now seen corresponding path program 2 times [2021-03-10 21:23:08,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:08,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710237479] [2021-03-10 21:23:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:08,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710237479] [2021-03-10 21:23:08,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:08,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:23:08,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279473511] [2021-03-10 21:23:08,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:23:08,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:08,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:23:08,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:23:08,550 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:08,569 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-03-10 21:23:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:23:08,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-10 21:23:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:08,571 INFO L225 Difference]: With dead ends: 20 [2021-03-10 21:23:08,571 INFO L226 Difference]: Without dead ends: 20 [2021-03-10 21:23:08,571 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:23:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-03-10 21:23:08,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-03-10 21:23:08,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-03-10 21:23:08,577 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-03-10 21:23:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:08,577 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-03-10 21:23:08,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,577 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-03-10 21:23:08,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:23:08,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:08,578 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:08,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 21:23:08,578 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:08,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:08,578 INFO L82 PathProgramCache]: Analyzing trace with hash -2005825454, now seen corresponding path program 1 times [2021-03-10 21:23:08,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:08,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596865769] [2021-03-10 21:23:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:08,608 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 21:23:08,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596865769] [2021-03-10 21:23:08,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144687194] [2021-03-10 21:23:08,608 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 21:23:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:08,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:23:08,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:08,723 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 21:23:08,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:08,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-03-10 21:23:08,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877644510] [2021-03-10 21:23:08,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:23:08,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:08,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:23:08,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:23:08,725 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:08,734 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-03-10 21:23:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:23:08,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 21:23:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:08,735 INFO L225 Difference]: With dead ends: 24 [2021-03-10 21:23:08,735 INFO L226 Difference]: Without dead ends: 24 [2021-03-10 21:23:08,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:23:08,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-03-10 21:23:08,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-03-10 21:23:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-03-10 21:23:08,737 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-03-10 21:23:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:08,737 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-03-10 21:23:08,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-03-10 21:23:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:23:08,738 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:08,738 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:08,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:08,951 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:08,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:08,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1462566514, now seen corresponding path program 2 times [2021-03-10 21:23:08,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:08,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996754263] [2021-03-10 21:23:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:08,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996754263] [2021-03-10 21:23:08,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025681477] [2021-03-10 21:23:08,978 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 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 21:23:09,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:09,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:09,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:09,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:09,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:09,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-03-10 21:23:09,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586182414] [2021-03-10 21:23:09,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:09,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:09,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:09,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:09,064 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:09,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:09,087 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-03-10 21:23:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:23:09,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:23:09,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:09,088 INFO L225 Difference]: With dead ends: 28 [2021-03-10 21:23:09,088 INFO L226 Difference]: Without dead ends: 28 [2021-03-10 21:23:09,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:09,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-03-10 21:23:09,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-03-10 21:23:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-03-10 21:23:09,090 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-03-10 21:23:09,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:09,091 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-03-10 21:23:09,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-03-10 21:23:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:09,091 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:09,091 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:09,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:09,306 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:09,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:09,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1608535122, now seen corresponding path program 3 times [2021-03-10 21:23:09,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:09,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714949994] [2021-03-10 21:23:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:09,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714949994] [2021-03-10 21:23:09,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921258730] [2021-03-10 21:23:09,335 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 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 21:23:09,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:23:09,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:09,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:23:09,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:09,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:09,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:23:09,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:09,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:09,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:09,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:23:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:09,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:09,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-03-10 21:23:09,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057689315] [2021-03-10 21:23:09,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:09,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:09,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:09,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:09,511 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.1) 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 21:23:09,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:09,542 INFO L93 Difference]: Finished difference Result 67 states and 119 transitions. [2021-03-10 21:23:09,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:09,543 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) 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 13 [2021-03-10 21:23:09,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:09,543 INFO L225 Difference]: With dead ends: 67 [2021-03-10 21:23:09,543 INFO L226 Difference]: Without dead ends: 64 [2021-03-10 21:23:09,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:09,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-03-10 21:23:09,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 39. [2021-03-10 21:23:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 82 transitions. [2021-03-10 21:23:09,547 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 82 transitions. Word has length 13 [2021-03-10 21:23:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:09,548 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 82 transitions. [2021-03-10 21:23:09,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) 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 21:23:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 82 transitions. [2021-03-10 21:23:09,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:09,548 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:09,548 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:09,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:09,765 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:09,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:09,766 INFO L82 PathProgramCache]: Analyzing trace with hash -942907630, now seen corresponding path program 4 times [2021-03-10 21:23:09,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:09,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937904288] [2021-03-10 21:23:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:09,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937904288] [2021-03-10 21:23:09,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682942554] [2021-03-10 21:23:09,803 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:09,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:09,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:09,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:23:09,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:09,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:09,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:23:09,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:09,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:09,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:09,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:23:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:09,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:09,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-03-10 21:23:09,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743676324] [2021-03-10 21:23:09,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:09,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:09,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:09,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:09,937 INFO L87 Difference]: Start difference. First operand 39 states and 82 transitions. Second operand has 10 states, 10 states have (on average 2.0) 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 21:23:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:09,966 INFO L93 Difference]: Finished difference Result 75 states and 144 transitions. [2021-03-10 21:23:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:09,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) 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 13 [2021-03-10 21:23:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:09,967 INFO L225 Difference]: With dead ends: 75 [2021-03-10 21:23:09,967 INFO L226 Difference]: Without dead ends: 72 [2021-03-10 21:23:09,967 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-03-10 21:23:09,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2021-03-10 21:23:09,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 103 transitions. [2021-03-10 21:23:09,971 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 103 transitions. Word has length 13 [2021-03-10 21:23:09,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:09,971 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 103 transitions. [2021-03-10 21:23:09,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) 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 21:23:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 103 transitions. [2021-03-10 21:23:09,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:09,972 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:09,972 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:10,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 21:23:10,173 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash -317115318, now seen corresponding path program 5 times [2021-03-10 21:23:10,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:10,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927367616] [2021-03-10 21:23:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:10,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927367616] [2021-03-10 21:23:10,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614085042] [2021-03-10 21:23:10,198 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 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 21:23:10,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:23:10,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:10,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:23:10,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:10,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:10,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:23:10,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:10,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:10,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:10,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:23:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:10,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:10,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-03-10 21:23:10,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669763586] [2021-03-10 21:23:10,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:10,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:10,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:10,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:10,313 INFO L87 Difference]: Start difference. First operand 45 states and 103 transitions. Second operand has 10 states, 10 states have (on average 2.0) 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 21:23:10,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:10,356 INFO L93 Difference]: Finished difference Result 83 states and 169 transitions. [2021-03-10 21:23:10,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:10,357 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) 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 13 [2021-03-10 21:23:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:10,358 INFO L225 Difference]: With dead ends: 83 [2021-03-10 21:23:10,358 INFO L226 Difference]: Without dead ends: 80 [2021-03-10 21:23:10,358 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-03-10 21:23:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-03-10 21:23:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-03-10 21:23:10,374 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 13 [2021-03-10 21:23:10,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:10,374 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-03-10 21:23:10,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) 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 21:23:10,374 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-03-10 21:23:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:10,375 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:10,375 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:10,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:10,583 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:10,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1902577170, now seen corresponding path program 6 times [2021-03-10 21:23:10,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:10,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283014937] [2021-03-10 21:23:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:10,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283014937] [2021-03-10 21:23:10,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208150699] [2021-03-10 21:23:10,613 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 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 21:23:10,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:23:10,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:10,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:23:10,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:10,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:10,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-03-10 21:23:10,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:10,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:10,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:10,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-03-10 21:23:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:10,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:10,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-03-10 21:23:10,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002136358] [2021-03-10 21:23:10,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:10,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:10,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:10,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:10,730 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand has 10 states, 10 states have (on average 2.0) 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 21:23:10,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:10,777 INFO L93 Difference]: Finished difference Result 92 states and 197 transitions. [2021-03-10 21:23:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:10,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) 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 13 [2021-03-10 21:23:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:10,778 INFO L225 Difference]: With dead ends: 92 [2021-03-10 21:23:10,778 INFO L226 Difference]: Without dead ends: 89 [2021-03-10 21:23:10,778 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:10,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-03-10 21:23:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2021-03-10 21:23:10,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5833333333333335) internal successors, (155), 60 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 155 transitions. [2021-03-10 21:23:10,782 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 155 transitions. Word has length 13 [2021-03-10 21:23:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:10,782 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 155 transitions. [2021-03-10 21:23:10,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) 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 21:23:10,782 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 155 transitions. [2021-03-10 21:23:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:10,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:10,784 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:10,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 21:23:10,995 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:10,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:10,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1838594674, now seen corresponding path program 7 times [2021-03-10 21:23:10,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:10,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203510108] [2021-03-10 21:23:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:11,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203510108] [2021-03-10 21:23:11,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289793310] [2021-03-10 21:23:11,037 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 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 21:23:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:11,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:11,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:11,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:23:11,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781237463] [2021-03-10 21:23:11,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:11,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:11,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:11,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:11,098 INFO L87 Difference]: Start difference. First operand 61 states and 155 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) 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 21:23:11,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:11,168 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-03-10 21:23:11,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:23:11,169 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 14 [2021-03-10 21:23:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:11,169 INFO L225 Difference]: With dead ends: 114 [2021-03-10 21:23:11,169 INFO L226 Difference]: Without dead ends: 114 [2021-03-10 21:23:11,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:11,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-03-10 21:23:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 62. [2021-03-10 21:23:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.6065573770491803) internal successors, (159), 61 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 159 transitions. [2021-03-10 21:23:11,177 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 159 transitions. Word has length 14 [2021-03-10 21:23:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:11,177 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 159 transitions. [2021-03-10 21:23:11,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 21:23:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 159 transitions. [2021-03-10 21:23:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:11,177 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:11,178 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:11,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 21:23:11,391 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:11,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:11,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1651947095, now seen corresponding path program 8 times [2021-03-10 21:23:11,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:11,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877686745] [2021-03-10 21:23:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:11,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877686745] [2021-03-10 21:23:11,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558039046] [2021-03-10 21:23:11,426 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 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 21:23:11,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:11,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:11,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:11,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:11,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:11,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:23:11,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218876517] [2021-03-10 21:23:11,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:11,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:11,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:11,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:11,487 INFO L87 Difference]: Start difference. First operand 62 states and 159 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) 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 21:23:11,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:11,576 INFO L93 Difference]: Finished difference Result 121 states and 252 transitions. [2021-03-10 21:23:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:23:11,577 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 14 [2021-03-10 21:23:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:11,577 INFO L225 Difference]: With dead ends: 121 [2021-03-10 21:23:11,577 INFO L226 Difference]: Without dead ends: 116 [2021-03-10 21:23:11,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:11,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-03-10 21:23:11,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-03-10 21:23:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5945945945945947) internal successors, (192), 74 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-03-10 21:23:11,584 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 14 [2021-03-10 21:23:11,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:11,584 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-03-10 21:23:11,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 21:23:11,584 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-03-10 21:23:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:11,586 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:11,586 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:11,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:11,796 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:11,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:11,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1032606612, now seen corresponding path program 9 times [2021-03-10 21:23:11,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:11,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004679666] [2021-03-10 21:23:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:11,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004679666] [2021-03-10 21:23:11,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185126155] [2021-03-10 21:23:11,829 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 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 21:23:11,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:23:11,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:11,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:11,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:11,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:11,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-03-10 21:23:11,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566977696] [2021-03-10 21:23:11,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:11,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:11,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:11,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:11,931 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21:23:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:12,143 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2021-03-10 21:23:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:23:12,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14 [2021-03-10 21:23:12,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:12,144 INFO L225 Difference]: With dead ends: 137 [2021-03-10 21:23:12,144 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 21:23:12,144 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:23:12,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 21:23:12,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2021-03-10 21:23:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.6116504854368934) internal successors, (269), 103 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 269 transitions. [2021-03-10 21:23:12,150 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 269 transitions. Word has length 14 [2021-03-10 21:23:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:12,150 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 269 transitions. [2021-03-10 21:23:12,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21:23:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 269 transitions. [2021-03-10 21:23:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:12,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:12,150 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:12,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:12,355 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:12,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:12,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1949662965, now seen corresponding path program 10 times [2021-03-10 21:23:12,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:12,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131010776] [2021-03-10 21:23:12,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:12,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131010776] [2021-03-10 21:23:12,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491696329] [2021-03-10 21:23:12,388 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 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 21:23:12,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:12,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:12,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:12,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:12,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:12,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:23:12,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808144581] [2021-03-10 21:23:12,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:12,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:12,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:12,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:12,443 INFO L87 Difference]: Start difference. First operand 104 states and 269 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:23:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:12,473 INFO L93 Difference]: Finished difference Result 162 states and 349 transitions. [2021-03-10 21:23:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:12,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-03-10 21:23:12,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:12,474 INFO L225 Difference]: With dead ends: 162 [2021-03-10 21:23:12,474 INFO L226 Difference]: Without dead ends: 162 [2021-03-10 21:23:12,474 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:12,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-03-10 21:23:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 105. [2021-03-10 21:23:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6153846153846154) internal successors, (272), 104 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 272 transitions. [2021-03-10 21:23:12,485 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 272 transitions. Word has length 14 [2021-03-10 21:23:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:12,485 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 272 transitions. [2021-03-10 21:23:12,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:23:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 272 transitions. [2021-03-10 21:23:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:12,487 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:12,487 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:12,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 21:23:12,699 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:12,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:12,699 INFO L82 PathProgramCache]: Analyzing trace with hash 857706217, now seen corresponding path program 11 times [2021-03-10 21:23:12,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:12,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766430962] [2021-03-10 21:23:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:12,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766430962] [2021-03-10 21:23:12,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472176632] [2021-03-10 21:23:12,727 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 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 21:23:12,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:23:12,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:12,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:12,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:12,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:12,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:23:12,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321774989] [2021-03-10 21:23:12,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:12,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:12,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:12,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:12,766 INFO L87 Difference]: Start difference. First operand 105 states and 272 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:23:12,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:12,831 INFO L93 Difference]: Finished difference Result 170 states and 369 transitions. [2021-03-10 21:23:12,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:12,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-03-10 21:23:12,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:12,833 INFO L225 Difference]: With dead ends: 170 [2021-03-10 21:23:12,833 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 21:23:12,833 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:12,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 21:23:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 112. [2021-03-10 21:23:12,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-03-10 21:23:12,836 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-03-10 21:23:12,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:12,836 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-03-10 21:23:12,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:23:12,836 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-03-10 21:23:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:12,836 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:12,836 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:13,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 21:23:13,051 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:13,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1719512019, now seen corresponding path program 12 times [2021-03-10 21:23:13,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:13,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151825277] [2021-03-10 21:23:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:13,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151825277] [2021-03-10 21:23:13,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114198540] [2021-03-10 21:23:13,078 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:13,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:23:13,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:13,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:13,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:13,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:13,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:23:13,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738241604] [2021-03-10 21:23:13,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:13,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:13,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:13,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:13,125 INFO L87 Difference]: Start difference. First operand 112 states and 295 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:23:13,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:13,153 INFO L93 Difference]: Finished difference Result 174 states and 379 transitions. [2021-03-10 21:23:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:13,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-03-10 21:23:13,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:13,154 INFO L225 Difference]: With dead ends: 174 [2021-03-10 21:23:13,154 INFO L226 Difference]: Without dead ends: 174 [2021-03-10 21:23:13,154 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-03-10 21:23:13,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 112. [2021-03-10 21:23:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-03-10 21:23:13,157 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-03-10 21:23:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:13,157 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-03-10 21:23:13,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:23:13,158 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-03-10 21:23:13,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:13,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:13,158 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:13,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 21:23:13,363 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:13,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:13,363 INFO L82 PathProgramCache]: Analyzing trace with hash 846407943, now seen corresponding path program 13 times [2021-03-10 21:23:13,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:13,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410980338] [2021-03-10 21:23:13,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:13,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410980338] [2021-03-10 21:23:13,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310986662] [2021-03-10 21:23:13,420 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 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 21:23:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:13,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:13,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:13,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:13,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:23:13,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908083506] [2021-03-10 21:23:13,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:13,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:13,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:13,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:13,463 INFO L87 Difference]: Start difference. First operand 112 states and 295 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) 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 21:23:13,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:13,513 INFO L93 Difference]: Finished difference Result 188 states and 405 transitions. [2021-03-10 21:23:13,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:13,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 14 [2021-03-10 21:23:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:13,516 INFO L225 Difference]: With dead ends: 188 [2021-03-10 21:23:13,517 INFO L226 Difference]: Without dead ends: 188 [2021-03-10 21:23:13,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:13,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-03-10 21:23:13,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-03-10 21:23:13,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.663716814159292) internal successors, (301), 113 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 301 transitions. [2021-03-10 21:23:13,521 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 301 transitions. Word has length 14 [2021-03-10 21:23:13,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:13,522 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 301 transitions. [2021-03-10 21:23:13,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 21:23:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 301 transitions. [2021-03-10 21:23:13,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:13,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:13,522 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:13,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:13,731 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:13,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:13,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1217568591, now seen corresponding path program 14 times [2021-03-10 21:23:13,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:13,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436022114] [2021-03-10 21:23:13,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:13,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436022114] [2021-03-10 21:23:13,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479589010] [2021-03-10 21:23:13,757 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:13,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:13,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:13,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:13,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:13,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:13,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:23:13,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094467783] [2021-03-10 21:23:13,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:13,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:13,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:13,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:13,802 INFO L87 Difference]: Start difference. First operand 114 states and 301 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:23:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:13,849 INFO L93 Difference]: Finished difference Result 182 states and 405 transitions. [2021-03-10 21:23:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:13,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-03-10 21:23:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:13,850 INFO L225 Difference]: With dead ends: 182 [2021-03-10 21:23:13,850 INFO L226 Difference]: Without dead ends: 180 [2021-03-10 21:23:13,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-03-10 21:23:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 124. [2021-03-10 21:23:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-03-10 21:23:13,853 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-03-10 21:23:13,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:13,854 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-03-10 21:23:13,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:23:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-03-10 21:23:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:13,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:13,855 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:14,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 21:23:14,059 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:14,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:14,059 INFO L82 PathProgramCache]: Analyzing trace with hash 500180469, now seen corresponding path program 15 times [2021-03-10 21:23:14,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:14,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174004252] [2021-03-10 21:23:14,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:14,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174004252] [2021-03-10 21:23:14,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445884581] [2021-03-10 21:23:14,095 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 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 21:23:14,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:14,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:14,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:14,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:14,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:14,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:23:14,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424367437] [2021-03-10 21:23:14,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:14,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:14,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:14,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:14,137 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:23:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:14,165 INFO L93 Difference]: Finished difference Result 185 states and 412 transitions. [2021-03-10 21:23:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:14,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-03-10 21:23:14,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:14,169 INFO L225 Difference]: With dead ends: 185 [2021-03-10 21:23:14,169 INFO L226 Difference]: Without dead ends: 185 [2021-03-10 21:23:14,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-03-10 21:23:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 124. [2021-03-10 21:23:14,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:14,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-03-10 21:23:14,172 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-03-10 21:23:14,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:14,172 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-03-10 21:23:14,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:23:14,172 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-03-10 21:23:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:14,172 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:14,172 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:14,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:14,380 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:14,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1228866865, now seen corresponding path program 16 times [2021-03-10 21:23:14,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:14,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103606648] [2021-03-10 21:23:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:14,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103606648] [2021-03-10 21:23:14,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097048852] [2021-03-10 21:23:14,412 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 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 21:23:14,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:14,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:14,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:14,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:14,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:14,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:23:14,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558852596] [2021-03-10 21:23:14,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:14,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:14,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:14,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:14,471 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) 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 21:23:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:14,523 INFO L93 Difference]: Finished difference Result 194 states and 429 transitions. [2021-03-10 21:23:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:14,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 14 [2021-03-10 21:23:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:14,524 INFO L225 Difference]: With dead ends: 194 [2021-03-10 21:23:14,525 INFO L226 Difference]: Without dead ends: 194 [2021-03-10 21:23:14,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:14,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-03-10 21:23:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 124. [2021-03-10 21:23:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-03-10 21:23:14,528 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-03-10 21:23:14,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:14,528 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-03-10 21:23:14,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 21:23:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-03-10 21:23:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:14,528 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:14,528 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:14,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 21:23:14,745 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1005240629, now seen corresponding path program 17 times [2021-03-10 21:23:14,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:14,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179095414] [2021-03-10 21:23:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:14,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179095414] [2021-03-10 21:23:14,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227117975] [2021-03-10 21:23:14,774 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 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 21:23:14,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:23:14,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:14,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:14,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:14,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:14,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:23:14,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105729129] [2021-03-10 21:23:14,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:14,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:14,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:14,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:14,843 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) 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 21:23:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:14,918 INFO L93 Difference]: Finished difference Result 201 states and 462 transitions. [2021-03-10 21:23:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:14,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 14 [2021-03-10 21:23:14,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:14,919 INFO L225 Difference]: With dead ends: 201 [2021-03-10 21:23:14,919 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 21:23:14,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 21:23:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 132. [2021-03-10 21:23:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.7404580152671754) internal successors, (359), 131 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 21:23:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 359 transitions. [2021-03-10 21:23:14,922 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 359 transitions. Word has length 14 [2021-03-10 21:23:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:14,923 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 359 transitions. [2021-03-10 21:23:14,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 21:23:14,923 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 359 transitions. [2021-03-10 21:23:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:14,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:14,923 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:15,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-03-10 21:23:15,139 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:15,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1126578199, now seen corresponding path program 18 times [2021-03-10 21:23:15,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:15,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816382681] [2021-03-10 21:23:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:15,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816382681] [2021-03-10 21:23:15,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559209053] [2021-03-10 21:23:15,173 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 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 21:23:15,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:23:15,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:15,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:15,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:15,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-03-10 21:23:15,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866675588] [2021-03-10 21:23:15,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:15,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:15,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:15,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:15,232 INFO L87 Difference]: Start difference. First operand 132 states and 359 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 21:23:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:15,315 INFO L93 Difference]: Finished difference Result 208 states and 487 transitions. [2021-03-10 21:23:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:15,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14 [2021-03-10 21:23:15,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:15,317 INFO L225 Difference]: With dead ends: 208 [2021-03-10 21:23:15,317 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 21:23:15,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:15,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 21:23:15,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2021-03-10 21:23:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8) internal successors, (420), 150 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 21:23:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 420 transitions. [2021-03-10 21:23:15,320 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 420 transitions. Word has length 14 [2021-03-10 21:23:15,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:15,320 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 420 transitions. [2021-03-10 21:23:15,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 21:23:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 420 transitions. [2021-03-10 21:23:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:15,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:15,321 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:15,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:15,531 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:15,532 INFO L82 PathProgramCache]: Analyzing trace with hash 591170861, now seen corresponding path program 19 times [2021-03-10 21:23:15,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:15,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335110507] [2021-03-10 21:23:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:15,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335110507] [2021-03-10 21:23:15,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430818254] [2021-03-10 21:23:15,569 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:15,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:15,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:15,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:15,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-03-10 21:23:15,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622368331] [2021-03-10 21:23:15,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:15,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:15,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:15,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:15,631 INFO L87 Difference]: Start difference. First operand 151 states and 420 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 21:23:15,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:15,695 INFO L93 Difference]: Finished difference Result 199 states and 469 transitions. [2021-03-10 21:23:15,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:15,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14 [2021-03-10 21:23:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:15,696 INFO L225 Difference]: With dead ends: 199 [2021-03-10 21:23:15,696 INFO L226 Difference]: Without dead ends: 199 [2021-03-10 21:23:15,696 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:15,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-03-10 21:23:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 148. [2021-03-10 21:23:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.7687074829931975) internal successors, (407), 147 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 21:23:15,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 407 transitions. [2021-03-10 21:23:15,700 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 407 transitions. Word has length 14 [2021-03-10 21:23:15,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:15,700 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 407 transitions. [2021-03-10 21:23:15,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 21:23:15,700 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 407 transitions. [2021-03-10 21:23:15,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:15,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:15,700 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:15,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 21:23:15,919 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:15,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1137876473, now seen corresponding path program 20 times [2021-03-10 21:23:15,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:15,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163452828] [2021-03-10 21:23:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:15,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163452828] [2021-03-10 21:23:15,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24452166] [2021-03-10 21:23:15,951 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 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 21:23:15,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:15,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:15,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:15,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:16,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:16,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:23:16,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874640383] [2021-03-10 21:23:16,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:16,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:16,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:16,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:16,016 INFO L87 Difference]: Start difference. First operand 148 states and 407 transitions. Second operand has 10 states, 10 states have (on average 1.9) 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 21:23:16,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:16,099 INFO L93 Difference]: Finished difference Result 203 states and 476 transitions. [2021-03-10 21:23:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:16,099 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) 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 14 [2021-03-10 21:23:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:16,100 INFO L225 Difference]: With dead ends: 203 [2021-03-10 21:23:16,100 INFO L226 Difference]: Without dead ends: 203 [2021-03-10 21:23:16,100 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:16,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-03-10 21:23:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 144. [2021-03-10 21:23:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.7482517482517483) internal successors, (393), 143 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 21:23:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 393 transitions. [2021-03-10 21:23:16,103 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 393 transitions. Word has length 14 [2021-03-10 21:23:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:16,103 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 393 transitions. [2021-03-10 21:23:16,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) 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 21:23:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 393 transitions. [2021-03-10 21:23:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:16,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:16,104 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:16,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 21:23:16,307 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:16,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1096231021, now seen corresponding path program 21 times [2021-03-10 21:23:16,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:16,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442699310] [2021-03-10 21:23:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:16,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442699310] [2021-03-10 21:23:16,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348108624] [2021-03-10 21:23:16,346 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 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 21:23:16,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:16,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:16,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:16,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:16,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:16,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:23:16,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364812182] [2021-03-10 21:23:16,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:16,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:16,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:16,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:16,415 INFO L87 Difference]: Start difference. First operand 144 states and 393 transitions. Second operand has 10 states, 10 states have (on average 1.9) 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 21:23:16,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:16,492 INFO L93 Difference]: Finished difference Result 179 states and 442 transitions. [2021-03-10 21:23:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:16,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) 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 14 [2021-03-10 21:23:16,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:16,493 INFO L225 Difference]: With dead ends: 179 [2021-03-10 21:23:16,493 INFO L226 Difference]: Without dead ends: 179 [2021-03-10 21:23:16,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:16,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-03-10 21:23:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-03-10 21:23:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.7357142857142858) internal successors, (383), 140 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 21:23:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 383 transitions. [2021-03-10 21:23:16,497 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 383 transitions. Word has length 14 [2021-03-10 21:23:16,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:16,497 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 383 transitions. [2021-03-10 21:23:16,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) 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 21:23:16,497 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 383 transitions. [2021-03-10 21:23:16,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:16,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:16,497 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:16,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:16,711 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:16,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:16,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1634086599, now seen corresponding path program 22 times [2021-03-10 21:23:16,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:16,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690762218] [2021-03-10 21:23:16,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:16,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690762218] [2021-03-10 21:23:16,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434895865] [2021-03-10 21:23:16,751 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 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 21:23:16,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:16,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:16,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:16,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:16,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:23:16,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914000009] [2021-03-10 21:23:16,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:16,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:16,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:16,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:16,815 INFO L87 Difference]: Start difference. First operand 141 states and 383 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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 21:23:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:16,938 INFO L93 Difference]: Finished difference Result 200 states and 499 transitions. [2021-03-10 21:23:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 14 [2021-03-10 21:23:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:16,939 INFO L225 Difference]: With dead ends: 200 [2021-03-10 21:23:16,939 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 21:23:16,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:23:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 21:23:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 142. [2021-03-10 21:23:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.74468085106383) internal successors, (387), 141 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 21:23:16,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 387 transitions. [2021-03-10 21:23:16,942 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 387 transitions. Word has length 14 [2021-03-10 21:23:16,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:16,942 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 387 transitions. [2021-03-10 21:23:16,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 21:23:16,942 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 387 transitions. [2021-03-10 21:23:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:16,942 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:16,942 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:17,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 21:23:17,156 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:17,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:17,157 INFO L82 PathProgramCache]: Analyzing trace with hash 674548242, now seen corresponding path program 23 times [2021-03-10 21:23:17,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:17,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449041042] [2021-03-10 21:23:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:17,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449041042] [2021-03-10 21:23:17,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819402298] [2021-03-10 21:23:17,191 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 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 21:23:17,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:17,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:17,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:17,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:17,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:17,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-03-10 21:23:17,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79898328] [2021-03-10 21:23:17,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:17,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:17,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:17,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:17,242 INFO L87 Difference]: Start difference. First operand 142 states and 387 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 21:23:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:17,276 INFO L93 Difference]: Finished difference Result 197 states and 465 transitions. [2021-03-10 21:23:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:23:17,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 21:23:17,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:17,280 INFO L225 Difference]: With dead ends: 197 [2021-03-10 21:23:17,280 INFO L226 Difference]: Without dead ends: 197 [2021-03-10 21:23:17,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:17,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-03-10 21:23:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2021-03-10 21:23:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.7448275862068967) internal successors, (398), 145 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 21:23:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 398 transitions. [2021-03-10 21:23:17,284 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 398 transitions. Word has length 15 [2021-03-10 21:23:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:17,284 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 398 transitions. [2021-03-10 21:23:17,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 21:23:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 398 transitions. [2021-03-10 21:23:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:17,284 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:17,284 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:17,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:17,495 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:17,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:17,495 INFO L82 PathProgramCache]: Analyzing trace with hash -164351056, now seen corresponding path program 24 times [2021-03-10 21:23:17,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:17,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424808884] [2021-03-10 21:23:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:17,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424808884] [2021-03-10 21:23:17,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221066311] [2021-03-10 21:23:17,525 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 21:23:17,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:23:17,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:17,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:17,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-03-10 21:23:17,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337036892] [2021-03-10 21:23:17,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:17,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:17,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:17,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:17,566 INFO L87 Difference]: Start difference. First operand 146 states and 398 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 21:23:17,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:17,620 INFO L93 Difference]: Finished difference Result 194 states and 457 transitions. [2021-03-10 21:23:17,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:17,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 15 [2021-03-10 21:23:17,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:17,621 INFO L225 Difference]: With dead ends: 194 [2021-03-10 21:23:17,621 INFO L226 Difference]: Without dead ends: 192 [2021-03-10 21:23:17,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-03-10 21:23:17,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 146. [2021-03-10 21:23:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.731034482758621) internal successors, (396), 145 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 21:23:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 396 transitions. [2021-03-10 21:23:17,624 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 396 transitions. Word has length 15 [2021-03-10 21:23:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:17,624 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 396 transitions. [2021-03-10 21:23:17,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 21:23:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 396 transitions. [2021-03-10 21:23:17,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:17,624 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:17,624 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:17,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 21:23:17,838 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:17,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:17,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1325053940, now seen corresponding path program 25 times [2021-03-10 21:23:17,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:17,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994440939] [2021-03-10 21:23:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:17,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994440939] [2021-03-10 21:23:17,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133916415] [2021-03-10 21:23:17,872 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 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 21:23:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:17,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:17,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:17,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:17,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-03-10 21:23:17,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779734260] [2021-03-10 21:23:17,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:17,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:17,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:17,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:17,922 INFO L87 Difference]: Start difference. First operand 146 states and 396 transitions. Second operand has 10 states, 10 states have (on average 2.0) 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 21:23:17,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:17,984 INFO L93 Difference]: Finished difference Result 179 states and 439 transitions. [2021-03-10 21:23:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:17,984 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) 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 15 [2021-03-10 21:23:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:17,985 INFO L225 Difference]: With dead ends: 179 [2021-03-10 21:23:17,985 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 21:23:17,986 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:17,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 21:23:17,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2021-03-10 21:23:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.719178082191781) internal successors, (397), 146 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 21:23:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 397 transitions. [2021-03-10 21:23:17,988 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 397 transitions. Word has length 15 [2021-03-10 21:23:17,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:17,989 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 397 transitions. [2021-03-10 21:23:17,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) 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 21:23:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 397 transitions. [2021-03-10 21:23:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:17,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:17,990 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:18,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 21:23:18,203 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:18,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:18,203 INFO L82 PathProgramCache]: Analyzing trace with hash 765538634, now seen corresponding path program 26 times [2021-03-10 21:23:18,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:18,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231001227] [2021-03-10 21:23:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:18,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231001227] [2021-03-10 21:23:18,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814580624] [2021-03-10 21:23:18,231 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 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 21:23:18,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:18,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:18,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:18,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:18,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:18,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-03-10 21:23:18,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781676002] [2021-03-10 21:23:18,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:18,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:18,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:18,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:18,273 INFO L87 Difference]: Start difference. First operand 147 states and 397 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 21:23:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:18,309 INFO L93 Difference]: Finished difference Result 220 states and 505 transitions. [2021-03-10 21:23:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:18,309 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 21:23:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:18,310 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:23:18,310 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 21:23:18,310 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 21:23:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 151. [2021-03-10 21:23:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7333333333333334) internal successors, (410), 150 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 21:23:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 410 transitions. [2021-03-10 21:23:18,313 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 410 transitions. Word has length 15 [2021-03-10 21:23:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:18,313 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 410 transitions. [2021-03-10 21:23:18,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 21:23:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 410 transitions. [2021-03-10 21:23:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:18,313 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:18,314 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:18,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-03-10 21:23:18,528 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:18,528 INFO L82 PathProgramCache]: Analyzing trace with hash -73360664, now seen corresponding path program 27 times [2021-03-10 21:23:18,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:18,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954654989] [2021-03-10 21:23:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:18,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954654989] [2021-03-10 21:23:18,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822378] [2021-03-10 21:23:18,563 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 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 21:23:18,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:18,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:18,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:23:18,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:18,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:18,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:23:18,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847333125] [2021-03-10 21:23:18,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:18,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:18,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:18,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:18,608 INFO L87 Difference]: Start difference. First operand 151 states and 410 transitions. Second operand has 9 states, 9 states have (on average 2.0) 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 21:23:18,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:18,662 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2021-03-10 21:23:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:18,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) 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 15 [2021-03-10 21:23:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:18,663 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:23:18,663 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 21:23:18,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 21:23:18,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 151. [2021-03-10 21:23:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.72) internal successors, (408), 150 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 21:23:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 408 transitions. [2021-03-10 21:23:18,666 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 408 transitions. Word has length 15 [2021-03-10 21:23:18,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:18,666 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 408 transitions. [2021-03-10 21:23:18,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) 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 21:23:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 408 transitions. [2021-03-10 21:23:18,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:18,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:18,667 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:18,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:18,882 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:18,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1416044332, now seen corresponding path program 28 times [2021-03-10 21:23:18,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:18,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655270456] [2021-03-10 21:23:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:18,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655270456] [2021-03-10 21:23:18,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039136630] [2021-03-10 21:23:18,916 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 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 21:23:18,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:18,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:18,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:18,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:18,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:18,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-03-10 21:23:18,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693623895] [2021-03-10 21:23:18,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:18,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:18,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:18,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:18,968 INFO L87 Difference]: Start difference. First operand 151 states and 408 transitions. Second operand has 10 states, 10 states have (on average 2.0) 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 21:23:19,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:19,033 INFO L93 Difference]: Finished difference Result 212 states and 487 transitions. [2021-03-10 21:23:19,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:19,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) 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 15 [2021-03-10 21:23:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:19,038 INFO L225 Difference]: With dead ends: 212 [2021-03-10 21:23:19,038 INFO L226 Difference]: Without dead ends: 209 [2021-03-10 21:23:19,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-03-10 21:23:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 151. [2021-03-10 21:23:19,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7133333333333334) internal successors, (407), 150 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 21:23:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 407 transitions. [2021-03-10 21:23:19,041 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 407 transitions. Word has length 15 [2021-03-10 21:23:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:19,041 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 407 transitions. [2021-03-10 21:23:19,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) 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 21:23:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 407 transitions. [2021-03-10 21:23:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:19,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:19,041 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:19,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 21:23:19,242 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:19,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:19,242 INFO L82 PathProgramCache]: Analyzing trace with hash 342958952, now seen corresponding path program 29 times [2021-03-10 21:23:19,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:19,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845115880] [2021-03-10 21:23:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:19,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845115880] [2021-03-10 21:23:19,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164573753] [2021-03-10 21:23:19,276 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:19,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:19,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:19,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:19,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:19,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:19,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-03-10 21:23:19,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689927884] [2021-03-10 21:23:19,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:19,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:19,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:19,323 INFO L87 Difference]: Start difference. First operand 151 states and 407 transitions. Second operand has 10 states, 10 states have (on average 2.0) 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 21:23:19,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:19,373 INFO L93 Difference]: Finished difference Result 182 states and 465 transitions. [2021-03-10 21:23:19,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:19,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) 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 15 [2021-03-10 21:23:19,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:19,374 INFO L225 Difference]: With dead ends: 182 [2021-03-10 21:23:19,375 INFO L226 Difference]: Without dead ends: 179 [2021-03-10 21:23:19,376 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:19,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-03-10 21:23:19,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-03-10 21:23:19,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7066666666666666) internal successors, (406), 150 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 406 transitions. [2021-03-10 21:23:19,379 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 406 transitions. Word has length 15 [2021-03-10 21:23:19,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:19,379 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 406 transitions. [2021-03-10 21:23:19,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) 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 21:23:19,379 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 406 transitions. [2021-03-10 21:23:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:19,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:19,380 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:19,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:19,594 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:19,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:19,595 INFO L82 PathProgramCache]: Analyzing trace with hash -708726510, now seen corresponding path program 30 times [2021-03-10 21:23:19,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:19,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468435787] [2021-03-10 21:23:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:19,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468435787] [2021-03-10 21:23:19,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923363948] [2021-03-10 21:23:19,629 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 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 21:23:19,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:19,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:19,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:19,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:19,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:19,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-03-10 21:23:19,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634431014] [2021-03-10 21:23:19,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:19,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:19,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:19,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:19,689 INFO L87 Difference]: Start difference. First operand 151 states and 406 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) 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 21:23:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:19,740 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2021-03-10 21:23:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:19,741 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) 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 21:23:19,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:19,742 INFO L225 Difference]: With dead ends: 262 [2021-03-10 21:23:19,742 INFO L226 Difference]: Without dead ends: 262 [2021-03-10 21:23:19,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:19,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-03-10 21:23:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 175. [2021-03-10 21:23:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.839080459770115) internal successors, (494), 174 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 21:23:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 494 transitions. [2021-03-10 21:23:19,745 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 494 transitions. Word has length 15 [2021-03-10 21:23:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:19,745 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 494 transitions. [2021-03-10 21:23:19,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) 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 21:23:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 494 transitions. [2021-03-10 21:23:19,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:19,746 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:19,746 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:19,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 21:23:19,959 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:19,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:19,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1547625808, now seen corresponding path program 31 times [2021-03-10 21:23:19,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:19,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147510034] [2021-03-10 21:23:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:19,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147510034] [2021-03-10 21:23:19,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653733736] [2021-03-10 21:23:20,000 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 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 21:23:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:20,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:20,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:20,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:20,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-03-10 21:23:20,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350398849] [2021-03-10 21:23:20,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:20,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:20,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:20,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:20,049 INFO L87 Difference]: Start difference. First operand 175 states and 494 transitions. Second operand has 10 states, 10 states have (on average 2.2) 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 21:23:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:20,119 INFO L93 Difference]: Finished difference Result 242 states and 591 transitions. [2021-03-10 21:23:20,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:20,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) 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 15 [2021-03-10 21:23:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:20,120 INFO L225 Difference]: With dead ends: 242 [2021-03-10 21:23:20,120 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:23:20,121 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:20,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:23:20,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 175. [2021-03-10 21:23:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8275862068965516) internal successors, (492), 174 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 21:23:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 492 transitions. [2021-03-10 21:23:20,124 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 492 transitions. Word has length 15 [2021-03-10 21:23:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:20,124 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 492 transitions. [2021-03-10 21:23:20,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) 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 21:23:20,124 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 492 transitions. [2021-03-10 21:23:20,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:20,124 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:20,124 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:20,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 21:23:20,339 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:20,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:20,339 INFO L82 PathProgramCache]: Analyzing trace with hash -58220812, now seen corresponding path program 32 times [2021-03-10 21:23:20,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:20,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443217396] [2021-03-10 21:23:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:20,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443217396] [2021-03-10 21:23:20,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444279446] [2021-03-10 21:23:20,371 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 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 21:23:20,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:20,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:20,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:20,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:20,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:20,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-03-10 21:23:20,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218665719] [2021-03-10 21:23:20,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:20,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:20,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:20,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:20,418 INFO L87 Difference]: Start difference. First operand 175 states and 492 transitions. Second operand has 11 states, 11 states have (on average 2.0) 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 21:23:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:20,489 INFO L93 Difference]: Finished difference Result 247 states and 596 transitions. [2021-03-10 21:23:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:20,489 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) 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 21:23:20,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:20,490 INFO L225 Difference]: With dead ends: 247 [2021-03-10 21:23:20,490 INFO L226 Difference]: Without dead ends: 244 [2021-03-10 21:23:20,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-03-10 21:23:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 179. [2021-03-10 21:23:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.842696629213483) internal successors, (506), 178 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 506 transitions. [2021-03-10 21:23:20,494 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 506 transitions. Word has length 15 [2021-03-10 21:23:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:20,494 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 506 transitions. [2021-03-10 21:23:20,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) 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 21:23:20,494 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 506 transitions. [2021-03-10 21:23:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:20,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:20,494 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:20,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-10 21:23:20,707 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:20,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1131306192, now seen corresponding path program 33 times [2021-03-10 21:23:20,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:20,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929185767] [2021-03-10 21:23:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:20,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929185767] [2021-03-10 21:23:20,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895741229] [2021-03-10 21:23:20,743 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:20,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:23:20,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:20,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:20,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:20,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:20,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-03-10 21:23:20,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493367101] [2021-03-10 21:23:20,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:20,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:20,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:20,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:20,799 INFO L87 Difference]: Start difference. First operand 179 states and 506 transitions. Second operand has 11 states, 11 states have (on average 2.0) 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 21:23:20,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:20,867 INFO L93 Difference]: Finished difference Result 219 states and 577 transitions. [2021-03-10 21:23:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:20,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) 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 21:23:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:20,868 INFO L225 Difference]: With dead ends: 219 [2021-03-10 21:23:20,868 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 21:23:20,868 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:20,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 21:23:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 179. [2021-03-10 21:23:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.837078651685393) internal successors, (505), 178 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:20,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 505 transitions. [2021-03-10 21:23:20,874 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 505 transitions. Word has length 15 [2021-03-10 21:23:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:20,874 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 505 transitions. [2021-03-10 21:23:20,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) 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 21:23:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 505 transitions. [2021-03-10 21:23:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:20,874 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:20,874 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:21,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 21:23:21,079 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:21,079 INFO L82 PathProgramCache]: Analyzing trace with hash -37214604, now seen corresponding path program 34 times [2021-03-10 21:23:21,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:21,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48581227] [2021-03-10 21:23:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:21,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48581227] [2021-03-10 21:23:21,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793832056] [2021-03-10 21:23:21,116 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 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 21:23:21,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:21,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:21,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:23:21,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:21,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:21,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-10 21:23:21,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538004095] [2021-03-10 21:23:21,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:21,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:21,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:21,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:21,169 INFO L87 Difference]: Start difference. First operand 179 states and 505 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 21:23:21,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:21,236 INFO L93 Difference]: Finished difference Result 212 states and 567 transitions. [2021-03-10 21:23:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:21,236 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 15 [2021-03-10 21:23:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:21,237 INFO L225 Difference]: With dead ends: 212 [2021-03-10 21:23:21,237 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 21:23:21,237 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 21:23:21,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 179. [2021-03-10 21:23:21,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.831460674157303) internal successors, (504), 178 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:21,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 504 transitions. [2021-03-10 21:23:21,240 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 504 transitions. Word has length 15 [2021-03-10 21:23:21,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:21,240 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 504 transitions. [2021-03-10 21:23:21,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 21:23:21,240 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 504 transitions. [2021-03-10 21:23:21,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:21,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:21,240 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:21,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 21:23:21,455 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:21,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:21,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1066138199, now seen corresponding path program 35 times [2021-03-10 21:23:21,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:21,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845893561] [2021-03-10 21:23:21,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:21,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845893561] [2021-03-10 21:23:21,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848751706] [2021-03-10 21:23:21,535 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 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 21:23:21,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:21,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:21,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:23:21,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:21,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:21,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 21:23:21,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115802148] [2021-03-10 21:23:21,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:21,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:21,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:21,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:21,600 INFO L87 Difference]: Start difference. First operand 179 states and 504 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:21,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:21,683 INFO L93 Difference]: Finished difference Result 452 states and 1210 transitions. [2021-03-10 21:23:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:21,683 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:21,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:21,685 INFO L225 Difference]: With dead ends: 452 [2021-03-10 21:23:21,685 INFO L226 Difference]: Without dead ends: 448 [2021-03-10 21:23:21,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:21,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-03-10 21:23:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 236. [2021-03-10 21:23:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.748936170212766) internal successors, (646), 235 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 646 transitions. [2021-03-10 21:23:21,690 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 646 transitions. Word has length 16 [2021-03-10 21:23:21,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:21,691 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 646 transitions. [2021-03-10 21:23:21,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 646 transitions. [2021-03-10 21:23:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:21,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:21,691 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:21,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 21:23:21,905 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:21,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:21,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2129828983, now seen corresponding path program 36 times [2021-03-10 21:23:21,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:21,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928164102] [2021-03-10 21:23:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:21,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928164102] [2021-03-10 21:23:21,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612087121] [2021-03-10 21:23:21,941 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 21:23:21,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:23:21,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:21,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:23:21,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:22,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:22,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:22,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:22,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:22,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:22,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:22,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:22,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-10 21:23:22,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082622644] [2021-03-10 21:23:22,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:23:22,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:22,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:23:22,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:22,281 INFO L87 Difference]: Start difference. First operand 236 states and 646 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:23:22,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:22,358 INFO L93 Difference]: Finished difference Result 318 states and 823 transitions. [2021-03-10 21:23:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:22,358 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:23:22,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:22,359 INFO L225 Difference]: With dead ends: 318 [2021-03-10 21:23:22,359 INFO L226 Difference]: Without dead ends: 315 [2021-03-10 21:23:22,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-03-10 21:23:22,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 284. [2021-03-10 21:23:22,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7420494699646643) internal successors, (776), 283 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 776 transitions. [2021-03-10 21:23:22,363 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 776 transitions. Word has length 17 [2021-03-10 21:23:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:22,363 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 776 transitions. [2021-03-10 21:23:22,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:23:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 776 transitions. [2021-03-10 21:23:22,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:22,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:22,364 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:22,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-03-10 21:23:22,578 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:22,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:22,579 INFO L82 PathProgramCache]: Analyzing trace with hash 368526055, now seen corresponding path program 37 times [2021-03-10 21:23:22,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:22,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641642550] [2021-03-10 21:23:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:22,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641642550] [2021-03-10 21:23:22,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744266] [2021-03-10 21:23:22,613 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:22,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:23:22,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:22,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:22,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:22,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:22,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:22,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:22,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:22,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:22,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-10 21:23:22,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367454722] [2021-03-10 21:23:22,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:23:22,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:22,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:23:22,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:22,862 INFO L87 Difference]: Start difference. First operand 284 states and 776 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:22,957 INFO L93 Difference]: Finished difference Result 363 states and 957 transitions. [2021-03-10 21:23:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:22,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:22,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:22,958 INFO L225 Difference]: With dead ends: 363 [2021-03-10 21:23:22,958 INFO L226 Difference]: Without dead ends: 359 [2021-03-10 21:23:22,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-03-10 21:23:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 326. [2021-03-10 21:23:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.766153846153846) internal successors, (899), 325 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:22,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 899 transitions. [2021-03-10 21:23:22,978 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 899 transitions. Word has length 17 [2021-03-10 21:23:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:22,978 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 899 transitions. [2021-03-10 21:23:22,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 899 transitions. [2021-03-10 21:23:22,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:22,979 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:22,979 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:23,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:23,193 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:23,194 INFO L82 PathProgramCache]: Analyzing trace with hash 527358741, now seen corresponding path program 38 times [2021-03-10 21:23:23,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:23,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451703368] [2021-03-10 21:23:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:23,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451703368] [2021-03-10 21:23:23,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43968764] [2021-03-10 21:23:23,229 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 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 21:23:23,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:23,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:23,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:23:23,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:23,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:23,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:23,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:23,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:23,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:23,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:23,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:23,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-10 21:23:23,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473486267] [2021-03-10 21:23:23,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:23:23,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:23,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:23:23,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:23,524 INFO L87 Difference]: Start difference. First operand 326 states and 899 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:23,636 INFO L93 Difference]: Finished difference Result 412 states and 1100 transitions. [2021-03-10 21:23:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:23,637 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:23,638 INFO L225 Difference]: With dead ends: 412 [2021-03-10 21:23:23,638 INFO L226 Difference]: Without dead ends: 408 [2021-03-10 21:23:23,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:23,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-03-10 21:23:23,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 370. [2021-03-10 21:23:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.8048780487804876) internal successors, (1035), 369 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1035 transitions. [2021-03-10 21:23:23,643 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1035 transitions. Word has length 17 [2021-03-10 21:23:23,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:23,643 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 1035 transitions. [2021-03-10 21:23:23,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1035 transitions. [2021-03-10 21:23:23,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:23,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:23,644 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:23,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-10 21:23:23,859 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:23,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:23,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1156204711, now seen corresponding path program 39 times [2021-03-10 21:23:23,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:23,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322463785] [2021-03-10 21:23:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:23,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322463785] [2021-03-10 21:23:23,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430332663] [2021-03-10 21:23:23,891 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:23,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:23:23,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:23,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:23:23,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:24,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:24,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:24,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:24,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:24,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:24,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:24,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:24,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-10 21:23:24,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726475657] [2021-03-10 21:23:24,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:23:24,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:24,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:23:24,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:24,183 INFO L87 Difference]: Start difference. First operand 370 states and 1035 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:24,297 INFO L93 Difference]: Finished difference Result 474 states and 1277 transitions. [2021-03-10 21:23:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:24,298 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:24,299 INFO L225 Difference]: With dead ends: 474 [2021-03-10 21:23:24,299 INFO L226 Difference]: Without dead ends: 470 [2021-03-10 21:23:24,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-03-10 21:23:24,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 421. [2021-03-10 21:23:24,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.85) internal successors, (1197), 420 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 21:23:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1197 transitions. [2021-03-10 21:23:24,305 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1197 transitions. Word has length 17 [2021-03-10 21:23:24,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:24,305 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 1197 transitions. [2021-03-10 21:23:24,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1197 transitions. [2021-03-10 21:23:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:24,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:24,306 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:24,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:24,515 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:24,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash -824406699, now seen corresponding path program 40 times [2021-03-10 21:23:24,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:24,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908896889] [2021-03-10 21:23:24,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:24,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908896889] [2021-03-10 21:23:24,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082200212] [2021-03-10 21:23:24,545 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 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 21:23:24,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:24,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:24,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:23:24,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:24,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:24,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:24,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:24,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:24,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:24,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:24,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:24,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-10 21:23:24,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091609400] [2021-03-10 21:23:24,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:23:24,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:24,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:23:24,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:24,816 INFO L87 Difference]: Start difference. First operand 421 states and 1197 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:24,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:24,933 INFO L93 Difference]: Finished difference Result 501 states and 1382 transitions. [2021-03-10 21:23:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:24,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:24,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:24,935 INFO L225 Difference]: With dead ends: 501 [2021-03-10 21:23:24,935 INFO L226 Difference]: Without dead ends: 498 [2021-03-10 21:23:24,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:24,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-03-10 21:23:24,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 462. [2021-03-10 21:23:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.8720173535791758) internal successors, (1324), 461 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1324 transitions. [2021-03-10 21:23:24,941 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1324 transitions. Word has length 17 [2021-03-10 21:23:24,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:24,941 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 1324 transitions. [2021-03-10 21:23:24,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1324 transitions. [2021-03-10 21:23:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:24,942 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:24,942 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:25,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:25,143 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:25,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:25,143 INFO L82 PathProgramCache]: Analyzing trace with hash -2093818265, now seen corresponding path program 41 times [2021-03-10 21:23:25,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:25,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939755527] [2021-03-10 21:23:25,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:25,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939755527] [2021-03-10 21:23:25,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730918860] [2021-03-10 21:23:25,175 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:25,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:25,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:25,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:23:25,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:25,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:25,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:25,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:25,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:25,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:25,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:25,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:25,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-10 21:23:25,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206759299] [2021-03-10 21:23:25,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:23:25,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:25,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:23:25,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:25,473 INFO L87 Difference]: Start difference. First operand 462 states and 1324 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:25,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:25,572 INFO L93 Difference]: Finished difference Result 537 states and 1487 transitions. [2021-03-10 21:23:25,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:25,572 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:25,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:25,574 INFO L225 Difference]: With dead ends: 537 [2021-03-10 21:23:25,574 INFO L226 Difference]: Without dead ends: 534 [2021-03-10 21:23:25,574 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:25,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-03-10 21:23:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 497. [2021-03-10 21:23:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.8891129032258065) internal successors, (1433), 496 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1433 transitions. [2021-03-10 21:23:25,581 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1433 transitions. Word has length 17 [2021-03-10 21:23:25,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:25,581 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1433 transitions. [2021-03-10 21:23:25,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1433 transitions. [2021-03-10 21:23:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:25,582 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:25,582 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:25,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-03-10 21:23:25,787 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:25,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1504096149, now seen corresponding path program 42 times [2021-03-10 21:23:25,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:25,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028516632] [2021-03-10 21:23:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:25,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028516632] [2021-03-10 21:23:25,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946537424] [2021-03-10 21:23:25,820 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:25,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:25,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:25,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:23:25,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:26,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:26,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:26,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:26,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:26,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:26,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:26,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:26,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-10 21:23:26,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598105973] [2021-03-10 21:23:26,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:23:26,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:26,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:23:26,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:26,108 INFO L87 Difference]: Start difference. First operand 497 states and 1433 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:26,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:26,213 INFO L93 Difference]: Finished difference Result 574 states and 1592 transitions. [2021-03-10 21:23:26,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:26,213 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:26,215 INFO L225 Difference]: With dead ends: 574 [2021-03-10 21:23:26,215 INFO L226 Difference]: Without dead ends: 571 [2021-03-10 21:23:26,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-03-10 21:23:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 529. [2021-03-10 21:23:26,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.9015151515151514) internal successors, (1532), 528 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:26,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1532 transitions. [2021-03-10 21:23:26,222 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1532 transitions. Word has length 17 [2021-03-10 21:23:26,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:26,222 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 1532 transitions. [2021-03-10 21:23:26,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:23:26,223 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1532 transitions. [2021-03-10 21:23:26,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:26,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:26,223 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:26,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:26,429 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1577117358, now seen corresponding path program 43 times [2021-03-10 21:23:26,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:26,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978434716] [2021-03-10 21:23:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:26,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978434716] [2021-03-10 21:23:26,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074211425] [2021-03-10 21:23:26,478 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:26,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:26,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:26,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:26,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:23:26,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8737668] [2021-03-10 21:23:26,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:26,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:26,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:26,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:26,524 INFO L87 Difference]: Start difference. First operand 529 states and 1532 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:26,687 INFO L93 Difference]: Finished difference Result 696 states and 1799 transitions. [2021-03-10 21:23:26,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:23:26,688 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-03-10 21:23:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:26,690 INFO L225 Difference]: With dead ends: 696 [2021-03-10 21:23:26,690 INFO L226 Difference]: Without dead ends: 689 [2021-03-10 21:23:26,690 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:23:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-03-10 21:23:26,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 549. [2021-03-10 21:23:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.906934306569343) internal successors, (1593), 548 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1593 transitions. [2021-03-10 21:23:26,706 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1593 transitions. Word has length 18 [2021-03-10 21:23:26,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:26,706 INFO L480 AbstractCegarLoop]: Abstraction has 549 states and 1593 transitions. [2021-03-10 21:23:26,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:26,706 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1593 transitions. [2021-03-10 21:23:26,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:26,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:26,707 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:26,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-03-10 21:23:26,922 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:26,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:26,922 INFO L82 PathProgramCache]: Analyzing trace with hash 121393866, now seen corresponding path program 44 times [2021-03-10 21:23:26,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:26,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055248939] [2021-03-10 21:23:26,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:26,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055248939] [2021-03-10 21:23:26,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884294215] [2021-03-10 21:23:26,961 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 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 21:23:26,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:26,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:26,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:26,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:27,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:27,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:27,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582787214] [2021-03-10 21:23:27,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:27,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:27,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:27,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:27,016 INFO L87 Difference]: Start difference. First operand 549 states and 1593 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:27,056 INFO L93 Difference]: Finished difference Result 706 states and 1828 transitions. [2021-03-10 21:23:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:27,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-03-10 21:23:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:27,058 INFO L225 Difference]: With dead ends: 706 [2021-03-10 21:23:27,058 INFO L226 Difference]: Without dead ends: 706 [2021-03-10 21:23:27,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:27,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-03-10 21:23:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 525. [2021-03-10 21:23:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.8874045801526718) internal successors, (1513), 524 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1513 transitions. [2021-03-10 21:23:27,067 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1513 transitions. Word has length 18 [2021-03-10 21:23:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:27,067 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 1513 transitions. [2021-03-10 21:23:27,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1513 transitions. [2021-03-10 21:23:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:27,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:27,068 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:27,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-03-10 21:23:27,275 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:27,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:27,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1437522508, now seen corresponding path program 45 times [2021-03-10 21:23:27,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:27,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191923440] [2021-03-10 21:23:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:27,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191923440] [2021-03-10 21:23:27,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107528781] [2021-03-10 21:23:27,311 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:27,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:27,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:27,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:27,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:27,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:27,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:27,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321028395] [2021-03-10 21:23:27,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:27,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:27,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:27,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:27,354 INFO L87 Difference]: Start difference. First operand 525 states and 1513 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:27,446 INFO L93 Difference]: Finished difference Result 683 states and 1762 transitions. [2021-03-10 21:23:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:27,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-03-10 21:23:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:27,448 INFO L225 Difference]: With dead ends: 683 [2021-03-10 21:23:27,448 INFO L226 Difference]: Without dead ends: 681 [2021-03-10 21:23:27,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-03-10 21:23:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 547. [2021-03-10 21:23:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.8956043956043955) internal successors, (1581), 546 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1581 transitions. [2021-03-10 21:23:27,461 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1581 transitions. Word has length 18 [2021-03-10 21:23:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:27,461 INFO L480 AbstractCegarLoop]: Abstraction has 547 states and 1581 transitions. [2021-03-10 21:23:27,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1581 transitions. [2021-03-10 21:23:27,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:27,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:27,462 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:27,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-03-10 21:23:27,664 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:27,664 INFO L82 PathProgramCache]: Analyzing trace with hash 280226552, now seen corresponding path program 46 times [2021-03-10 21:23:27,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:27,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234508897] [2021-03-10 21:23:27,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:27,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234508897] [2021-03-10 21:23:27,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397456062] [2021-03-10 21:23:27,711 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 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 21:23:27,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:27,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:27,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:27,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:27,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:27,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:27,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706198012] [2021-03-10 21:23:27,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:27,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:27,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:27,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:27,760 INFO L87 Difference]: Start difference. First operand 547 states and 1581 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:27,803 INFO L93 Difference]: Finished difference Result 721 states and 1842 transitions. [2021-03-10 21:23:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:27,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-03-10 21:23:27,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:27,805 INFO L225 Difference]: With dead ends: 721 [2021-03-10 21:23:27,806 INFO L226 Difference]: Without dead ends: 721 [2021-03-10 21:23:27,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-03-10 21:23:27,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 548. [2021-03-10 21:23:27,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.895795246800731) internal successors, (1584), 547 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1584 transitions. [2021-03-10 21:23:27,815 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1584 transitions. Word has length 18 [2021-03-10 21:23:27,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:27,815 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 1584 transitions. [2021-03-10 21:23:27,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:27,816 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1584 transitions. [2021-03-10 21:23:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:27,816 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:27,816 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:28,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:28,031 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:28,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1448820782, now seen corresponding path program 47 times [2021-03-10 21:23:28,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:28,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866926863] [2021-03-10 21:23:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:28,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866926863] [2021-03-10 21:23:28,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439157951] [2021-03-10 21:23:28,071 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:28,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:28,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:28,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:28,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:28,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:28,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:23:28,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924942860] [2021-03-10 21:23:28,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:28,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:28,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:28,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:28,133 INFO L87 Difference]: Start difference. First operand 548 states and 1584 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:28,190 INFO L93 Difference]: Finished difference Result 777 states and 1974 transitions. [2021-03-10 21:23:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:28,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:23:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:28,192 INFO L225 Difference]: With dead ends: 777 [2021-03-10 21:23:28,192 INFO L226 Difference]: Without dead ends: 777 [2021-03-10 21:23:28,192 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-03-10 21:23:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 523. [2021-03-10 21:23:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.875478927203065) internal successors, (1501), 522 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1501 transitions. [2021-03-10 21:23:28,200 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1501 transitions. Word has length 18 [2021-03-10 21:23:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:28,200 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 1501 transitions. [2021-03-10 21:23:28,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1501 transitions. [2021-03-10 21:23:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:28,201 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:28,201 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:28,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:28,415 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:28,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:28,415 INFO L82 PathProgramCache]: Analyzing trace with hash -808676538, now seen corresponding path program 48 times [2021-03-10 21:23:28,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:28,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805711690] [2021-03-10 21:23:28,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:28,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805711690] [2021-03-10 21:23:28,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561605260] [2021-03-10 21:23:28,450 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:28,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:28,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:28,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:28,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:28,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:28,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462190447] [2021-03-10 21:23:28,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:28,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:28,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:28,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:28,506 INFO L87 Difference]: Start difference. First operand 523 states and 1501 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:28,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:28,592 INFO L93 Difference]: Finished difference Result 678 states and 1749 transitions. [2021-03-10 21:23:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:28,592 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-03-10 21:23:28,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:28,594 INFO L225 Difference]: With dead ends: 678 [2021-03-10 21:23:28,594 INFO L226 Difference]: Without dead ends: 676 [2021-03-10 21:23:28,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:28,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-03-10 21:23:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 547. [2021-03-10 21:23:28,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:28,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-03-10 21:23:28,603 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-03-10 21:23:28,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:28,603 INFO L480 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-03-10 21:23:28,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:28,603 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-03-10 21:23:28,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:28,604 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:28,604 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:28,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:28,817 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:28,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:28,818 INFO L82 PathProgramCache]: Analyzing trace with hash 909072522, now seen corresponding path program 49 times [2021-03-10 21:23:28,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:28,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332456166] [2021-03-10 21:23:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:28,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332456166] [2021-03-10 21:23:28,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060156904] [2021-03-10 21:23:28,855 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:28,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:28,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:28,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:28,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:28,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124222565] [2021-03-10 21:23:28,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:28,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:28,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:28,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:28,904 INFO L87 Difference]: Start difference. First operand 547 states and 1573 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:28,944 INFO L93 Difference]: Finished difference Result 708 states and 1807 transitions. [2021-03-10 21:23:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:28,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-03-10 21:23:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:28,946 INFO L225 Difference]: With dead ends: 708 [2021-03-10 21:23:28,946 INFO L226 Difference]: Without dead ends: 708 [2021-03-10 21:23:28,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-03-10 21:23:28,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 547. [2021-03-10 21:23:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-03-10 21:23:28,958 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-03-10 21:23:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:28,958 INFO L480 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-03-10 21:23:28,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:28,958 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-03-10 21:23:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:28,959 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:28,959 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:29,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:29,171 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:29,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:29,171 INFO L82 PathProgramCache]: Analyzing trace with hash -819974812, now seen corresponding path program 50 times [2021-03-10 21:23:29,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:29,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697882561] [2021-03-10 21:23:29,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:29,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697882561] [2021-03-10 21:23:29,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461010663] [2021-03-10 21:23:29,215 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 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 21:23:29,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:29,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:29,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:29,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:29,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:29,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:23:29,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614404572] [2021-03-10 21:23:29,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:29,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:29,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:29,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:29,268 INFO L87 Difference]: Start difference. First operand 547 states and 1573 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:29,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:29,336 INFO L93 Difference]: Finished difference Result 767 states and 1938 transitions. [2021-03-10 21:23:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:29,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:23:29,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:29,339 INFO L225 Difference]: With dead ends: 767 [2021-03-10 21:23:29,339 INFO L226 Difference]: Without dead ends: 767 [2021-03-10 21:23:29,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-03-10 21:23:29,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 520. [2021-03-10 21:23:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.859344894026975) internal successors, (1484), 519 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1484 transitions. [2021-03-10 21:23:29,347 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1484 transitions. Word has length 18 [2021-03-10 21:23:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:29,347 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 1484 transitions. [2021-03-10 21:23:29,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:29,347 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1484 transitions. [2021-03-10 21:23:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:29,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:29,348 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:29,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-03-10 21:23:29,548 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:29,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:29,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1414132682, now seen corresponding path program 51 times [2021-03-10 21:23:29,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:29,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055938882] [2021-03-10 21:23:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:29,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055938882] [2021-03-10 21:23:29,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434611438] [2021-03-10 21:23:29,592 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 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 21:23:29,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:23:29,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:29,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:29,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:29,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:23:29,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632029727] [2021-03-10 21:23:29,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:29,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:29,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:29,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:29,675 INFO L87 Difference]: Start difference. First operand 520 states and 1484 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:29,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:29,756 INFO L93 Difference]: Finished difference Result 976 states and 2581 transitions. [2021-03-10 21:23:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:23:29,757 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:23:29,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:29,759 INFO L225 Difference]: With dead ends: 976 [2021-03-10 21:23:29,759 INFO L226 Difference]: Without dead ends: 976 [2021-03-10 21:23:29,759 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-03-10 21:23:29,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 701. [2021-03-10 21:23:29,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.9371428571428573) internal successors, (2056), 700 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2056 transitions. [2021-03-10 21:23:29,769 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2056 transitions. Word has length 18 [2021-03-10 21:23:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:29,769 INFO L480 AbstractCegarLoop]: Abstraction has 701 states and 2056 transitions. [2021-03-10 21:23:29,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2056 transitions. [2021-03-10 21:23:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:29,770 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:29,770 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:29,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-03-10 21:23:29,984 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:29,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:29,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1505679348, now seen corresponding path program 52 times [2021-03-10 21:23:29,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:29,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663362730] [2021-03-10 21:23:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:30,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663362730] [2021-03-10 21:23:30,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651440050] [2021-03-10 21:23:30,020 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:30,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:30,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:30,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:30,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:30,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:30,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:30,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292896533] [2021-03-10 21:23:30,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:30,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:30,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:30,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:30,063 INFO L87 Difference]: Start difference. First operand 701 states and 2056 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:30,152 INFO L93 Difference]: Finished difference Result 888 states and 2419 transitions. [2021-03-10 21:23:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:30,152 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-03-10 21:23:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:30,155 INFO L225 Difference]: With dead ends: 888 [2021-03-10 21:23:30,155 INFO L226 Difference]: Without dead ends: 886 [2021-03-10 21:23:30,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-03-10 21:23:30,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 764. [2021-03-10 21:23:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.9436435124508518) internal successors, (2246), 763 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2246 transitions. [2021-03-10 21:23:30,165 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2246 transitions. Word has length 18 [2021-03-10 21:23:30,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:30,165 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2246 transitions. [2021-03-10 21:23:30,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:30,165 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2246 transitions. [2021-03-10 21:23:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:30,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:30,166 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:30,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-03-10 21:23:30,379 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:30,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1071538888, now seen corresponding path program 53 times [2021-03-10 21:23:30,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:30,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774093250] [2021-03-10 21:23:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:30,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774093250] [2021-03-10 21:23:30,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278465013] [2021-03-10 21:23:30,415 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 21:23:30,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:23:30,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:30,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:30,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:30,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:30,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:30,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360581670] [2021-03-10 21:23:30,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:30,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:30,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:30,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:30,485 INFO L87 Difference]: Start difference. First operand 764 states and 2246 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:30,523 INFO L93 Difference]: Finished difference Result 882 states and 2384 transitions. [2021-03-10 21:23:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:30,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-03-10 21:23:30,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:30,537 INFO L225 Difference]: With dead ends: 882 [2021-03-10 21:23:30,537 INFO L226 Difference]: Without dead ends: 882 [2021-03-10 21:23:30,537 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-03-10 21:23:30,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 755. [2021-03-10 21:23:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.9323607427055705) internal successors, (2211), 754 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2211 transitions. [2021-03-10 21:23:30,546 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2211 transitions. Word has length 18 [2021-03-10 21:23:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:30,546 INFO L480 AbstractCegarLoop]: Abstraction has 755 states and 2211 transitions. [2021-03-10 21:23:30,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2211 transitions. [2021-03-10 21:23:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:30,547 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:30,547 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:30,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-03-10 21:23:30,762 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:30,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:30,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1494381074, now seen corresponding path program 54 times [2021-03-10 21:23:30,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:30,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734086093] [2021-03-10 21:23:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:30,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734086093] [2021-03-10 21:23:30,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331265212] [2021-03-10 21:23:30,801 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 21:23:30,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:30,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:30,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:30,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:30,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:30,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:30,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566684331] [2021-03-10 21:23:30,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:30,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:30,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:30,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:30,855 INFO L87 Difference]: Start difference. First operand 755 states and 2211 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:30,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:30,911 INFO L93 Difference]: Finished difference Result 936 states and 2510 transitions. [2021-03-10 21:23:30,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:30,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:23:30,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:30,913 INFO L225 Difference]: With dead ends: 936 [2021-03-10 21:23:30,913 INFO L226 Difference]: Without dead ends: 936 [2021-03-10 21:23:30,913 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-03-10 21:23:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 710. [2021-03-10 21:23:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.913963328631876) internal successors, (2066), 709 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2066 transitions. [2021-03-10 21:23:30,923 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2066 transitions. Word has length 18 [2021-03-10 21:23:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:30,923 INFO L480 AbstractCegarLoop]: Abstraction has 710 states and 2066 transitions. [2021-03-10 21:23:30,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:30,923 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2066 transitions. [2021-03-10 21:23:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:30,924 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:30,924 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:31,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:31,138 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:31,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:31,139 INFO L82 PathProgramCache]: Analyzing trace with hash -566478728, now seen corresponding path program 55 times [2021-03-10 21:23:31,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:31,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61698320] [2021-03-10 21:23:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:31,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61698320] [2021-03-10 21:23:31,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078800019] [2021-03-10 21:23:31,189 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 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 21:23:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:31,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:31,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:31,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:31,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:31,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996271521] [2021-03-10 21:23:31,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:31,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:31,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:31,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:31,240 INFO L87 Difference]: Start difference. First operand 710 states and 2066 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:31,307 INFO L93 Difference]: Finished difference Result 1110 states and 3081 transitions. [2021-03-10 21:23:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:31,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:23:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:31,309 INFO L225 Difference]: With dead ends: 1110 [2021-03-10 21:23:31,309 INFO L226 Difference]: Without dead ends: 1110 [2021-03-10 21:23:31,309 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:31,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-03-10 21:23:31,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 950. [2021-03-10 21:23:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 2.9736564805057957) internal successors, (2822), 949 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:31,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2822 transitions. [2021-03-10 21:23:31,320 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2822 transitions. Word has length 18 [2021-03-10 21:23:31,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:31,320 INFO L480 AbstractCegarLoop]: Abstraction has 950 states and 2822 transitions. [2021-03-10 21:23:31,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:31,320 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2822 transitions. [2021-03-10 21:23:31,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:31,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:31,321 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:31,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-03-10 21:23:31,532 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:31,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:31,532 INFO L82 PathProgramCache]: Analyzing trace with hash -28623150, now seen corresponding path program 56 times [2021-03-10 21:23:31,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:31,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143552772] [2021-03-10 21:23:31,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:31,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143552772] [2021-03-10 21:23:31,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788633439] [2021-03-10 21:23:31,577 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 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 21:23:31,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:31,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:31,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:31,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:31,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:31,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:31,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813692173] [2021-03-10 21:23:31,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:31,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:31,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:31,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:31,626 INFO L87 Difference]: Start difference. First operand 950 states and 2822 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:31,744 INFO L93 Difference]: Finished difference Result 1384 states and 3920 transitions. [2021-03-10 21:23:31,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:31,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:23:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:31,756 INFO L225 Difference]: With dead ends: 1384 [2021-03-10 21:23:31,756 INFO L226 Difference]: Without dead ends: 1384 [2021-03-10 21:23:31,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-03-10 21:23:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1190. [2021-03-10 21:23:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.015138772077376) internal successors, (3585), 1189 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3585 transitions. [2021-03-10 21:23:31,774 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3585 transitions. Word has length 18 [2021-03-10 21:23:31,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:31,774 INFO L480 AbstractCegarLoop]: Abstraction has 1190 states and 3585 transitions. [2021-03-10 21:23:31,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3585 transitions. [2021-03-10 21:23:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:31,776 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:31,776 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:31,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:31,986 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:31,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:31,987 INFO L82 PathProgramCache]: Analyzing trace with hash -928129974, now seen corresponding path program 57 times [2021-03-10 21:23:31,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:31,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777943094] [2021-03-10 21:23:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:32,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777943094] [2021-03-10 21:23:32,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570215736] [2021-03-10 21:23:32,023 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 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 21:23:32,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:32,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:32,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:32,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:32,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:23:32,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739428479] [2021-03-10 21:23:32,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:32,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:32,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:32,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:32,069 INFO L87 Difference]: Start difference. First operand 1190 states and 3585 transitions. Second operand has 10 states, 10 states have (on average 1.9) 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 21:23:32,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:32,164 INFO L93 Difference]: Finished difference Result 1540 states and 4536 transitions. [2021-03-10 21:23:32,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:32,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) 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 18 [2021-03-10 21:23:32,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:32,166 INFO L225 Difference]: With dead ends: 1540 [2021-03-10 21:23:32,166 INFO L226 Difference]: Without dead ends: 1536 [2021-03-10 21:23:32,166 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:32,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-03-10 21:23:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1457. [2021-03-10 21:23:32,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 3.0494505494505493) internal successors, (4440), 1456 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 4440 transitions. [2021-03-10 21:23:32,183 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 4440 transitions. Word has length 18 [2021-03-10 21:23:32,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:32,183 INFO L480 AbstractCegarLoop]: Abstraction has 1457 states and 4440 transitions. [2021-03-10 21:23:32,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) 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 21:23:32,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 4440 transitions. [2021-03-10 21:23:32,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:32,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:32,184 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:32,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-03-10 21:23:32,385 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:32,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1482288330, now seen corresponding path program 58 times [2021-03-10 21:23:32,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:32,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9108315] [2021-03-10 21:23:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:32,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9108315] [2021-03-10 21:23:32,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681634932] [2021-03-10 21:23:32,427 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 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 21:23:32,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:32,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:32,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:32,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:32,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:32,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:32,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129272521] [2021-03-10 21:23:32,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:32,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:32,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:32,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:32,483 INFO L87 Difference]: Start difference. First operand 1457 states and 4440 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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 21:23:32,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:32,565 INFO L93 Difference]: Finished difference Result 1886 states and 5530 transitions. [2021-03-10 21:23:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:32,565 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 18 [2021-03-10 21:23:32,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:32,568 INFO L225 Difference]: With dead ends: 1886 [2021-03-10 21:23:32,568 INFO L226 Difference]: Without dead ends: 1886 [2021-03-10 21:23:32,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-03-10 21:23:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1647. [2021-03-10 21:23:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.0674362089914946) internal successors, (5049), 1646 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5049 transitions. [2021-03-10 21:23:32,591 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5049 transitions. Word has length 18 [2021-03-10 21:23:32,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:32,591 INFO L480 AbstractCegarLoop]: Abstraction has 1647 states and 5049 transitions. [2021-03-10 21:23:32,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 21:23:32,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5049 transitions. [2021-03-10 21:23:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:32,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:32,593 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:32,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:32,807 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:32,807 INFO L82 PathProgramCache]: Analyzing trace with hash 975942064, now seen corresponding path program 59 times [2021-03-10 21:23:32,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:32,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033208016] [2021-03-10 21:23:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:32,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033208016] [2021-03-10 21:23:32,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954846478] [2021-03-10 21:23:32,850 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 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 21:23:32,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:23:32,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:32,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:32,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:32,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:32,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:32,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398343136] [2021-03-10 21:23:32,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:32,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:32,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:32,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:32,899 INFO L87 Difference]: Start difference. First operand 1647 states and 5049 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:32,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:32,985 INFO L93 Difference]: Finished difference Result 2131 states and 6281 transitions. [2021-03-10 21:23:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:32,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:23:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:32,988 INFO L225 Difference]: With dead ends: 2131 [2021-03-10 21:23:32,988 INFO L226 Difference]: Without dead ends: 2131 [2021-03-10 21:23:32,988 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-03-10 21:23:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1134. [2021-03-10 21:23:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.0123565754633717) internal successors, (3413), 1133 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3413 transitions. [2021-03-10 21:23:33,005 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3413 transitions. Word has length 18 [2021-03-10 21:23:33,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:33,005 INFO L480 AbstractCegarLoop]: Abstraction has 1134 states and 3413 transitions. [2021-03-10 21:23:33,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:33,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3413 transitions. [2021-03-10 21:23:33,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:33,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:33,006 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:33,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-03-10 21:23:33,211 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:33,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1513797642, now seen corresponding path program 60 times [2021-03-10 21:23:33,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:33,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066926075] [2021-03-10 21:23:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:33,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066926075] [2021-03-10 21:23:33,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62819366] [2021-03-10 21:23:33,256 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:33,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:23:33,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:33,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:33,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:33,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:33,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:33,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177417563] [2021-03-10 21:23:33,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:33,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:33,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:33,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:33,315 INFO L87 Difference]: Start difference. First operand 1134 states and 3413 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:33,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:33,436 INFO L93 Difference]: Finished difference Result 1469 states and 4201 transitions. [2021-03-10 21:23:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:33,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:23:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:33,438 INFO L225 Difference]: With dead ends: 1469 [2021-03-10 21:23:33,438 INFO L226 Difference]: Without dead ends: 1469 [2021-03-10 21:23:33,439 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:33,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-03-10 21:23:33,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1145. [2021-03-10 21:23:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 3.015734265734266) internal successors, (3450), 1144 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3450 transitions. [2021-03-10 21:23:33,454 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3450 transitions. Word has length 18 [2021-03-10 21:23:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:33,454 INFO L480 AbstractCegarLoop]: Abstraction has 1145 states and 3450 transitions. [2021-03-10 21:23:33,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3450 transitions. [2021-03-10 21:23:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:33,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:33,455 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:33,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:33,659 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:33,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash 236267782, now seen corresponding path program 61 times [2021-03-10 21:23:33,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:33,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428341903] [2021-03-10 21:23:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:33,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428341903] [2021-03-10 21:23:33,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944734256] [2021-03-10 21:23:33,695 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 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 21:23:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:33,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:33,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:33,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:33,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:33,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144565668] [2021-03-10 21:23:33,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:33,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:33,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:33,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:33,755 INFO L87 Difference]: Start difference. First operand 1145 states and 3450 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:33,856 INFO L93 Difference]: Finished difference Result 1280 states and 3655 transitions. [2021-03-10 21:23:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:33,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-03-10 21:23:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:33,857 INFO L225 Difference]: With dead ends: 1280 [2021-03-10 21:23:33,857 INFO L226 Difference]: Without dead ends: 1276 [2021-03-10 21:23:33,858 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-03-10 21:23:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1116. [2021-03-10 21:23:33,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.0053811659192826) internal successors, (3351), 1115 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3351 transitions. [2021-03-10 21:23:33,869 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3351 transitions. Word has length 18 [2021-03-10 21:23:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:33,869 INFO L480 AbstractCegarLoop]: Abstraction has 1116 states and 3351 transitions. [2021-03-10 21:23:33,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3351 transitions. [2021-03-10 21:23:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:33,870 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:33,871 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:34,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-03-10 21:23:34,085 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:34,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:34,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1954016842, now seen corresponding path program 62 times [2021-03-10 21:23:34,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:34,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544302824] [2021-03-10 21:23:34,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:34,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544302824] [2021-03-10 21:23:34,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529781945] [2021-03-10 21:23:34,128 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 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 21:23:34,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:34,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:34,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:34,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:34,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:34,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:34,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461042436] [2021-03-10 21:23:34,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:34,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:34,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:34,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:34,176 INFO L87 Difference]: Start difference. First operand 1116 states and 3351 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:34,226 INFO L93 Difference]: Finished difference Result 1248 states and 3538 transitions. [2021-03-10 21:23:34,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:34,227 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-03-10 21:23:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:34,228 INFO L225 Difference]: With dead ends: 1248 [2021-03-10 21:23:34,228 INFO L226 Difference]: Without dead ends: 1248 [2021-03-10 21:23:34,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-03-10 21:23:34,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1114. [2021-03-10 21:23:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.0017969451931714) internal successors, (3341), 1113 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3341 transitions. [2021-03-10 21:23:34,240 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3341 transitions. Word has length 18 [2021-03-10 21:23:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:34,240 INFO L480 AbstractCegarLoop]: Abstraction has 1114 states and 3341 transitions. [2021-03-10 21:23:34,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3341 transitions. [2021-03-10 21:23:34,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:34,241 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:34,241 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:34,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable442,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:34,456 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:34,456 INFO L82 PathProgramCache]: Analyzing trace with hash 224969508, now seen corresponding path program 63 times [2021-03-10 21:23:34,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:34,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963837860] [2021-03-10 21:23:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:34,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963837860] [2021-03-10 21:23:34,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735323346] [2021-03-10 21:23:34,492 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 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 21:23:34,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:23:34,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:34,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:34,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:34,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:34,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:23:34,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92453774] [2021-03-10 21:23:34,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:34,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:34,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:34,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:34,543 INFO L87 Difference]: Start difference. First operand 1114 states and 3341 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:34,591 INFO L93 Difference]: Finished difference Result 1212 states and 3446 transitions. [2021-03-10 21:23:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:34,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:23:34,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:34,593 INFO L225 Difference]: With dead ends: 1212 [2021-03-10 21:23:34,593 INFO L226 Difference]: Without dead ends: 1212 [2021-03-10 21:23:34,593 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:34,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-03-10 21:23:34,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1096. [2021-03-10 21:23:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.992694063926941) internal successors, (3277), 1095 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3277 transitions. [2021-03-10 21:23:34,605 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3277 transitions. Word has length 18 [2021-03-10 21:23:34,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:34,605 INFO L480 AbstractCegarLoop]: Abstraction has 1096 states and 3277 transitions. [2021-03-10 21:23:34,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3277 transitions. [2021-03-10 21:23:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:34,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:34,606 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:34,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-03-10 21:23:34,821 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:34,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:34,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1835890294, now seen corresponding path program 64 times [2021-03-10 21:23:34,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:34,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462242298] [2021-03-10 21:23:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:34,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462242298] [2021-03-10 21:23:34,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614712536] [2021-03-10 21:23:34,863 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 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 21:23:34,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:34,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:34,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:34,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:34,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:34,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:23:34,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643719300] [2021-03-10 21:23:34,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:34,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:34,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:34,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:34,919 INFO L87 Difference]: Start difference. First operand 1096 states and 3277 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:35,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:35,000 INFO L93 Difference]: Finished difference Result 1269 states and 3581 transitions. [2021-03-10 21:23:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:35,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-03-10 21:23:35,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:35,002 INFO L225 Difference]: With dead ends: 1269 [2021-03-10 21:23:35,002 INFO L226 Difference]: Without dead ends: 1269 [2021-03-10 21:23:35,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:35,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-03-10 21:23:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1069. [2021-03-10 21:23:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 2.985955056179775) internal successors, (3189), 1068 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3189 transitions. [2021-03-10 21:23:35,014 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3189 transitions. Word has length 18 [2021-03-10 21:23:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:35,014 INFO L480 AbstractCegarLoop]: Abstraction has 1069 states and 3189 transitions. [2021-03-10 21:23:35,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3189 transitions. [2021-03-10 21:23:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:35,016 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:35,016 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:35,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-03-10 21:23:35,230 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:35,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1298034716, now seen corresponding path program 65 times [2021-03-10 21:23:35,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:35,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432418103] [2021-03-10 21:23:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:35,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432418103] [2021-03-10 21:23:35,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411290164] [2021-03-10 21:23:35,272 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 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 21:23:35,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:35,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:35,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:35,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:35,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:35,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:23:35,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425188604] [2021-03-10 21:23:35,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:35,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:35,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:35,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:35,325 INFO L87 Difference]: Start difference. First operand 1069 states and 3189 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:35,425 INFO L93 Difference]: Finished difference Result 1385 states and 3940 transitions. [2021-03-10 21:23:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:35,425 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-03-10 21:23:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:35,427 INFO L225 Difference]: With dead ends: 1385 [2021-03-10 21:23:35,427 INFO L226 Difference]: Without dead ends: 1385 [2021-03-10 21:23:35,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:35,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-03-10 21:23:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1117. [2021-03-10 21:23:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9946236559139785) internal successors, (3342), 1116 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3342 transitions. [2021-03-10 21:23:35,440 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3342 transitions. Word has length 18 [2021-03-10 21:23:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:35,440 INFO L480 AbstractCegarLoop]: Abstraction has 1117 states and 3342 transitions. [2021-03-10 21:23:35,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3342 transitions. [2021-03-10 21:23:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:35,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:35,441 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:35,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-03-10 21:23:35,655 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:35,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:35,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1804380982, now seen corresponding path program 66 times [2021-03-10 21:23:35,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:35,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099173831] [2021-03-10 21:23:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:35,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099173831] [2021-03-10 21:23:35,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062370723] [2021-03-10 21:23:35,697 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 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 21:23:35,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:23:35,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:35,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:35,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:35,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:35,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:23:35,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88461062] [2021-03-10 21:23:35,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:35,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:35,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:35,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:35,757 INFO L87 Difference]: Start difference. First operand 1117 states and 3342 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:35,924 INFO L93 Difference]: Finished difference Result 1491 states and 4244 transitions. [2021-03-10 21:23:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:23:35,924 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-03-10 21:23:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:35,926 INFO L225 Difference]: With dead ends: 1491 [2021-03-10 21:23:35,926 INFO L226 Difference]: Without dead ends: 1491 [2021-03-10 21:23:35,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:23:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-03-10 21:23:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1299. [2021-03-10 21:23:35,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.010785824345146) internal successors, (3908), 1298 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3908 transitions. [2021-03-10 21:23:35,941 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3908 transitions. Word has length 18 [2021-03-10 21:23:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:35,941 INFO L480 AbstractCegarLoop]: Abstraction has 1299 states and 3908 transitions. [2021-03-10 21:23:35,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3908 transitions. [2021-03-10 21:23:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:35,942 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:35,942 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:36,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:36,151 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:36,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:36,151 INFO L82 PathProgramCache]: Analyzing trace with hash -357725678, now seen corresponding path program 67 times [2021-03-10 21:23:36,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:36,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752870886] [2021-03-10 21:23:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:36,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752870886] [2021-03-10 21:23:36,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419512688] [2021-03-10 21:23:36,184 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 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 21:23:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:36,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:36,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:36,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:36,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:36,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646498580] [2021-03-10 21:23:36,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:36,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:36,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:36,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:36,238 INFO L87 Difference]: Start difference. First operand 1299 states and 3908 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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 21:23:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:36,354 INFO L93 Difference]: Finished difference Result 1466 states and 4238 transitions. [2021-03-10 21:23:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:23:36,355 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 18 [2021-03-10 21:23:36,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:36,357 INFO L225 Difference]: With dead ends: 1466 [2021-03-10 21:23:36,357 INFO L226 Difference]: Without dead ends: 1462 [2021-03-10 21:23:36,357 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-03-10 21:23:36,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1236. [2021-03-10 21:23:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.0) internal successors, (3705), 1235 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3705 transitions. [2021-03-10 21:23:36,378 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3705 transitions. Word has length 18 [2021-03-10 21:23:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:36,378 INFO L480 AbstractCegarLoop]: Abstraction has 1236 states and 3705 transitions. [2021-03-10 21:23:36,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 21:23:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3705 transitions. [2021-03-10 21:23:36,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:36,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:36,380 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:36,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-03-10 21:23:36,594 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:36,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:36,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2084201938, now seen corresponding path program 68 times [2021-03-10 21:23:36,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:36,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016470488] [2021-03-10 21:23:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:36,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016470488] [2021-03-10 21:23:36,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341852415] [2021-03-10 21:23:36,634 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 21:23:36,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:36,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:36,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:36,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:36,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:36,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:36,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086328113] [2021-03-10 21:23:36,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:36,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:36,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:36,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:36,700 INFO L87 Difference]: Start difference. First operand 1236 states and 3705 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:36,812 INFO L93 Difference]: Finished difference Result 1717 states and 4942 transitions. [2021-03-10 21:23:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:36,812 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:23:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:36,815 INFO L225 Difference]: With dead ends: 1717 [2021-03-10 21:23:36,815 INFO L226 Difference]: Without dead ends: 1717 [2021-03-10 21:23:36,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-03-10 21:23:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1445. [2021-03-10 21:23:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 3.020083102493075) internal successors, (4361), 1444 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:36,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4361 transitions. [2021-03-10 21:23:36,832 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4361 transitions. Word has length 18 [2021-03-10 21:23:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:36,832 INFO L480 AbstractCegarLoop]: Abstraction has 1445 states and 4361 transitions. [2021-03-10 21:23:36,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4361 transitions. [2021-03-10 21:23:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:36,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:36,833 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:37,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-03-10 21:23:37,047 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:37,047 INFO L82 PathProgramCache]: Analyzing trace with hash -727630420, now seen corresponding path program 69 times [2021-03-10 21:23:37,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:37,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620330135] [2021-03-10 21:23:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:37,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620330135] [2021-03-10 21:23:37,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837965141] [2021-03-10 21:23:37,088 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 21:23:37,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:37,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:37,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:37,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:37,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:37,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:23:37,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367378928] [2021-03-10 21:23:37,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:37,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:37,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:37,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:37,145 INFO L87 Difference]: Start difference. First operand 1445 states and 4361 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:37,250 INFO L93 Difference]: Finished difference Result 1815 states and 5279 transitions. [2021-03-10 21:23:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:23:37,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-03-10 21:23:37,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:37,253 INFO L225 Difference]: With dead ends: 1815 [2021-03-10 21:23:37,253 INFO L226 Difference]: Without dead ends: 1815 [2021-03-10 21:23:37,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:37,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-03-10 21:23:37,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1189. [2021-03-10 21:23:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.9974747474747474) internal successors, (3561), 1188 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3561 transitions. [2021-03-10 21:23:37,268 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3561 transitions. Word has length 18 [2021-03-10 21:23:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:37,268 INFO L480 AbstractCegarLoop]: Abstraction has 1189 states and 3561 transitions. [2021-03-10 21:23:37,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3561 transitions. [2021-03-10 21:23:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:37,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:37,269 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:37,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-03-10 21:23:37,484 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:37,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:37,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1233976686, now seen corresponding path program 70 times [2021-03-10 21:23:37,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:37,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777901222] [2021-03-10 21:23:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:37,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777901222] [2021-03-10 21:23:37,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979591157] [2021-03-10 21:23:37,527 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) [2021-03-10 21:23:37,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:37,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:37,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:37,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:37,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:37,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:23:37,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548854747] [2021-03-10 21:23:37,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:37,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:37,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:37,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:37,580 INFO L87 Difference]: Start difference. First operand 1189 states and 3561 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:37,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:37,739 INFO L93 Difference]: Finished difference Result 1539 states and 4366 transitions. [2021-03-10 21:23:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:23:37,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-03-10 21:23:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:37,741 INFO L225 Difference]: With dead ends: 1539 [2021-03-10 21:23:37,741 INFO L226 Difference]: Without dead ends: 1539 [2021-03-10 21:23:37,741 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:23:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-03-10 21:23:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1195. [2021-03-10 21:23:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 2.9983249581239533) internal successors, (3580), 1194 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3580 transitions. [2021-03-10 21:23:37,754 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3580 transitions. Word has length 18 [2021-03-10 21:23:37,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:37,755 INFO L480 AbstractCegarLoop]: Abstraction has 1195 states and 3580 transitions. [2021-03-10 21:23:37,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3580 transitions. [2021-03-10 21:23:37,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:37,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:37,756 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:37,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:37,970 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:37,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:37,971 INFO L82 PathProgramCache]: Analyzing trace with hash -460785100, now seen corresponding path program 71 times [2021-03-10 21:23:37,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:37,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477434457] [2021-03-10 21:23:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:38,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477434457] [2021-03-10 21:23:38,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392424353] [2021-03-10 21:23:38,006 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) [2021-03-10 21:23:38,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:38,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:38,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:38,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:38,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:38,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:38,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361218379] [2021-03-10 21:23:38,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:38,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:38,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:38,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:38,052 INFO L87 Difference]: Start difference. First operand 1195 states and 3580 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:38,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:38,140 INFO L93 Difference]: Finished difference Result 1319 states and 3767 transitions. [2021-03-10 21:23:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:38,140 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-03-10 21:23:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:38,141 INFO L225 Difference]: With dead ends: 1319 [2021-03-10 21:23:38,141 INFO L226 Difference]: Without dead ends: 1315 [2021-03-10 21:23:38,141 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:38,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-03-10 21:23:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1219. [2021-03-10 21:23:38,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.0) internal successors, (3654), 1218 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3654 transitions. [2021-03-10 21:23:38,154 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3654 transitions. Word has length 18 [2021-03-10 21:23:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:38,154 INFO L480 AbstractCegarLoop]: Abstraction has 1219 states and 3654 transitions. [2021-03-10 21:23:38,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3654 transitions. [2021-03-10 21:23:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:38,155 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:38,155 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:38,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:38,370 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:38,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:38,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1256963960, now seen corresponding path program 72 times [2021-03-10 21:23:38,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:38,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416157851] [2021-03-10 21:23:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:38,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416157851] [2021-03-10 21:23:38,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131911343] [2021-03-10 21:23:38,408 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 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 21:23:38,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:38,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:38,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:38,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:38,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:38,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:38,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6366741] [2021-03-10 21:23:38,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:38,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:38,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:38,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:38,458 INFO L87 Difference]: Start difference. First operand 1219 states and 3654 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:38,507 INFO L93 Difference]: Finished difference Result 1350 states and 3852 transitions. [2021-03-10 21:23:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:38,508 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-03-10 21:23:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:38,509 INFO L225 Difference]: With dead ends: 1350 [2021-03-10 21:23:38,509 INFO L226 Difference]: Without dead ends: 1350 [2021-03-10 21:23:38,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:38,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-03-10 21:23:38,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1220. [2021-03-10 21:23:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 3.0) internal successors, (3657), 1219 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 3657 transitions. [2021-03-10 21:23:38,521 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 3657 transitions. Word has length 18 [2021-03-10 21:23:38,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:38,522 INFO L480 AbstractCegarLoop]: Abstraction has 1220 states and 3657 transitions. [2021-03-10 21:23:38,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 3657 transitions. [2021-03-10 21:23:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:38,523 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:38,523 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:38,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:38,731 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:38,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:38,731 INFO L82 PathProgramCache]: Analyzing trace with hash -472083374, now seen corresponding path program 73 times [2021-03-10 21:23:38,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:38,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924059503] [2021-03-10 21:23:38,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:38,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924059503] [2021-03-10 21:23:38,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217874626] [2021-03-10 21:23:38,768 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) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:38,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:38,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:38,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:38,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:23:38,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41564434] [2021-03-10 21:23:38,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:38,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:38,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:38,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:38,835 INFO L87 Difference]: Start difference. First operand 1220 states and 3657 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:38,909 INFO L93 Difference]: Finished difference Result 1356 states and 3865 transitions. [2021-03-10 21:23:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:38,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:23:38,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:38,910 INFO L225 Difference]: With dead ends: 1356 [2021-03-10 21:23:38,910 INFO L226 Difference]: Without dead ends: 1356 [2021-03-10 21:23:38,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-03-10 21:23:38,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1215. [2021-03-10 21:23:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.9975288303130148) internal successors, (3639), 1214 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:38,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3639 transitions. [2021-03-10 21:23:38,928 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3639 transitions. Word has length 18 [2021-03-10 21:23:38,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:38,928 INFO L480 AbstractCegarLoop]: Abstraction has 1215 states and 3639 transitions. [2021-03-10 21:23:38,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:38,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3639 transitions. [2021-03-10 21:23:38,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:38,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:38,930 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:39,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-03-10 21:23:39,130 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1762024120, now seen corresponding path program 74 times [2021-03-10 21:23:39,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:39,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864851380] [2021-03-10 21:23:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:39,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864851380] [2021-03-10 21:23:39,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698297867] [2021-03-10 21:23:39,168 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 21:23:39,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:39,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:39,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:39,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:39,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:39,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:23:39,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774192116] [2021-03-10 21:23:39,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:39,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:39,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:39,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:39,218 INFO L87 Difference]: Start difference. First operand 1215 states and 3639 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:39,267 INFO L93 Difference]: Finished difference Result 1623 states and 4723 transitions. [2021-03-10 21:23:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:23:39,268 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 18 [2021-03-10 21:23:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:39,269 INFO L225 Difference]: With dead ends: 1623 [2021-03-10 21:23:39,269 INFO L226 Difference]: Without dead ends: 1623 [2021-03-10 21:23:39,269 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-03-10 21:23:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1529. [2021-03-10 21:23:39,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.017670157068063) internal successors, (4611), 1528 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4611 transitions. [2021-03-10 21:23:39,284 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4611 transitions. Word has length 18 [2021-03-10 21:23:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:39,284 INFO L480 AbstractCegarLoop]: Abstraction has 1529 states and 4611 transitions. [2021-03-10 21:23:39,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4611 transitions. [2021-03-10 21:23:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:39,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:39,285 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:39,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-03-10 21:23:39,499 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:39,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:39,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1995087598, now seen corresponding path program 75 times [2021-03-10 21:23:39,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:39,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562935585] [2021-03-10 21:23:39,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:39,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562935585] [2021-03-10 21:23:39,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149053692] [2021-03-10 21:23:39,540 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:39,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:39,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:39,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:39,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:39,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:39,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:23:39,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194016250] [2021-03-10 21:23:39,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:39,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:39,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:39,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:39,602 INFO L87 Difference]: Start difference. First operand 1529 states and 4611 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:39,686 INFO L93 Difference]: Finished difference Result 1693 states and 4893 transitions. [2021-03-10 21:23:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:39,686 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-03-10 21:23:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:39,687 INFO L225 Difference]: With dead ends: 1693 [2021-03-10 21:23:39,688 INFO L226 Difference]: Without dead ends: 1693 [2021-03-10 21:23:39,688 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:39,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-03-10 21:23:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1537. [2021-03-10 21:23:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.017578125) internal successors, (4635), 1536 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 4635 transitions. [2021-03-10 21:23:39,705 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 4635 transitions. Word has length 18 [2021-03-10 21:23:39,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:39,705 INFO L480 AbstractCegarLoop]: Abstraction has 1537 states and 4635 transitions. [2021-03-10 21:23:39,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 4635 transitions. [2021-03-10 21:23:39,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:39,706 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:39,706 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:39,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-03-10 21:23:39,919 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:39,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:39,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1793533432, now seen corresponding path program 76 times [2021-03-10 21:23:39,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:39,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952086829] [2021-03-10 21:23:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:39,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952086829] [2021-03-10 21:23:39,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804231525] [2021-03-10 21:23:39,969 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 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 21:23:39,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:39,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:39,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:39,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:40,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:40,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:23:40,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673869217] [2021-03-10 21:23:40,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:40,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:40,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:40,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:40,024 INFO L87 Difference]: Start difference. First operand 1537 states and 4635 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:40,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:40,153 INFO L93 Difference]: Finished difference Result 1777 states and 5185 transitions. [2021-03-10 21:23:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:23:40,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-03-10 21:23:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:40,154 INFO L225 Difference]: With dead ends: 1777 [2021-03-10 21:23:40,155 INFO L226 Difference]: Without dead ends: 1777 [2021-03-10 21:23:40,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:23:40,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-03-10 21:23:40,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1651. [2021-03-10 21:23:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.0187878787878786) internal successors, (4981), 1650 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:40,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4981 transitions. [2021-03-10 21:23:40,171 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4981 transitions. Word has length 18 [2021-03-10 21:23:40,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:40,171 INFO L480 AbstractCegarLoop]: Abstraction has 1651 states and 4981 transitions. [2021-03-10 21:23:40,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:40,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4981 transitions. [2021-03-10 21:23:40,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:40,173 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:40,173 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:40,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-03-10 21:23:40,374 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:40,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:40,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1018298926, now seen corresponding path program 77 times [2021-03-10 21:23:40,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:40,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350244774] [2021-03-10 21:23:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:40,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350244774] [2021-03-10 21:23:40,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265099897] [2021-03-10 21:23:40,421 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 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 21:23:40,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:40,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:40,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:40,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:40,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:40,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:23:40,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957741966] [2021-03-10 21:23:40,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:40,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:40,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:40,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:40,475 INFO L87 Difference]: Start difference. First operand 1651 states and 4981 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:40,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:40,645 INFO L93 Difference]: Finished difference Result 1973 states and 5717 transitions. [2021-03-10 21:23:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:23:40,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-03-10 21:23:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:40,647 INFO L225 Difference]: With dead ends: 1973 [2021-03-10 21:23:40,647 INFO L226 Difference]: Without dead ends: 1973 [2021-03-10 21:23:40,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:23:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-03-10 21:23:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1718. [2021-03-10 21:23:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.018054746651136) internal successors, (5182), 1717 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:40,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5182 transitions. [2021-03-10 21:23:40,665 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5182 transitions. Word has length 18 [2021-03-10 21:23:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:40,665 INFO L480 AbstractCegarLoop]: Abstraction has 1718 states and 5182 transitions. [2021-03-10 21:23:40,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 21:23:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5182 transitions. [2021-03-10 21:23:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:40,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:40,667 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:40,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-03-10 21:23:40,867 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:40,867 INFO L82 PathProgramCache]: Analyzing trace with hash 144938314, now seen corresponding path program 78 times [2021-03-10 21:23:40,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:40,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033452548] [2021-03-10 21:23:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:40,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033452548] [2021-03-10 21:23:40,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918247613] [2021-03-10 21:23:40,920 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:40,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:40,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:40,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:40,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:40,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:40,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-03-10 21:23:40,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359648173] [2021-03-10 21:23:40,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:40,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:40,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:40,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:40,971 INFO L87 Difference]: Start difference. First operand 1718 states and 5182 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21:23:41,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:41,128 INFO L93 Difference]: Finished difference Result 1834 states and 5328 transitions. [2021-03-10 21:23:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:23:41,128 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 18 [2021-03-10 21:23:41,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:41,130 INFO L225 Difference]: With dead ends: 1834 [2021-03-10 21:23:41,130 INFO L226 Difference]: Without dead ends: 1830 [2021-03-10 21:23:41,130 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-03-10 21:23:41,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1663. [2021-03-10 21:23:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.0138387484957883) internal successors, (5009), 1662 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5009 transitions. [2021-03-10 21:23:41,155 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5009 transitions. Word has length 18 [2021-03-10 21:23:41,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:41,155 INFO L480 AbstractCegarLoop]: Abstraction has 1663 states and 5009 transitions. [2021-03-10 21:23:41,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21:23:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5009 transitions. [2021-03-10 21:23:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:41,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:41,156 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:41,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:41,371 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:41,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:41,371 INFO L82 PathProgramCache]: Analyzing trace with hash -731312694, now seen corresponding path program 79 times [2021-03-10 21:23:41,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:41,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697637193] [2021-03-10 21:23:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:41,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697637193] [2021-03-10 21:23:41,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806202172] [2021-03-10 21:23:41,423 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:41,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:41,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:41,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:41,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 21:23:41,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130034573] [2021-03-10 21:23:41,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:41,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:41,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:41,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:41,487 INFO L87 Difference]: Start difference. First operand 1663 states and 5009 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:23:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:41,735 INFO L93 Difference]: Finished difference Result 2513 states and 7307 transitions. [2021-03-10 21:23:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:23:41,735 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 18 [2021-03-10 21:23:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:41,737 INFO L225 Difference]: With dead ends: 2513 [2021-03-10 21:23:41,737 INFO L226 Difference]: Without dead ends: 2513 [2021-03-10 21:23:41,737 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:23:41,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-03-10 21:23:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1818. [2021-03-10 21:23:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.0181618051733627) internal successors, (5484), 1817 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:41,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5484 transitions. [2021-03-10 21:23:41,758 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5484 transitions. Word has length 18 [2021-03-10 21:23:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:41,758 INFO L480 AbstractCegarLoop]: Abstraction has 1818 states and 5484 transitions. [2021-03-10 21:23:41,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:23:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5484 transitions. [2021-03-10 21:23:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:41,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:41,760 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:41,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-03-10 21:23:41,960 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:41,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:41,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1998769872, now seen corresponding path program 80 times [2021-03-10 21:23:41,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:41,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096378226] [2021-03-10 21:23:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:42,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096378226] [2021-03-10 21:23:42,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592676671] [2021-03-10 21:23:42,011 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:42,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:42,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:42,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:42,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:42,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 21:23:42,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182256536] [2021-03-10 21:23:42,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:42,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:42,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:42,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:42,071 INFO L87 Difference]: Start difference. First operand 1818 states and 5484 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:23:42,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:42,287 INFO L93 Difference]: Finished difference Result 2122 states and 6163 transitions. [2021-03-10 21:23:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:23:42,287 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 18 [2021-03-10 21:23:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:42,289 INFO L225 Difference]: With dead ends: 2122 [2021-03-10 21:23:42,289 INFO L226 Difference]: Without dead ends: 2122 [2021-03-10 21:23:42,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:23:42,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-03-10 21:23:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1809. [2021-03-10 21:23:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.019358407079646) internal successors, (5459), 1808 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:42,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 5459 transitions. [2021-03-10 21:23:42,309 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 5459 transitions. Word has length 18 [2021-03-10 21:23:42,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:42,309 INFO L480 AbstractCegarLoop]: Abstraction has 1809 states and 5459 transitions. [2021-03-10 21:23:42,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:23:42,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 5459 transitions. [2021-03-10 21:23:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:42,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:42,311 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:42,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:42,511 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:42,512 INFO L82 PathProgramCache]: Analyzing trace with hash -515634934, now seen corresponding path program 81 times [2021-03-10 21:23:42,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:42,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811309548] [2021-03-10 21:23:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:42,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811309548] [2021-03-10 21:23:42,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976442329] [2021-03-10 21:23:42,566 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 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 21:23:42,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:23:42,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:42,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:42,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:42,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:42,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 21:23:42,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133727606] [2021-03-10 21:23:42,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:42,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:42,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:42,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:42,629 INFO L87 Difference]: Start difference. First operand 1809 states and 5459 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:23:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:42,847 INFO L93 Difference]: Finished difference Result 2135 states and 6194 transitions. [2021-03-10 21:23:42,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:23:42,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 18 [2021-03-10 21:23:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:42,849 INFO L225 Difference]: With dead ends: 2135 [2021-03-10 21:23:42,849 INFO L226 Difference]: Without dead ends: 2135 [2021-03-10 21:23:42,849 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:23:42,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-03-10 21:23:42,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1814. [2021-03-10 21:23:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.0193050193050195) internal successors, (5474), 1813 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5474 transitions. [2021-03-10 21:23:42,869 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5474 transitions. Word has length 18 [2021-03-10 21:23:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:42,869 INFO L480 AbstractCegarLoop]: Abstraction has 1814 states and 5474 transitions. [2021-03-10 21:23:42,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:23:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5474 transitions. [2021-03-10 21:23:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:42,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:42,871 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:43,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:43,071 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:43,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:43,071 INFO L82 PathProgramCache]: Analyzing trace with hash -594587962, now seen corresponding path program 82 times [2021-03-10 21:23:43,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:43,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786484680] [2021-03-10 21:23:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:43,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786484680] [2021-03-10 21:23:43,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739269377] [2021-03-10 21:23:43,124 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 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 21:23:43,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:43,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:43,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:43,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:43,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:43,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-03-10 21:23:43,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280854340] [2021-03-10 21:23:43,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:43,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:43,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:43,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:43,182 INFO L87 Difference]: Start difference. First operand 1814 states and 5474 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21:23:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:43,297 INFO L93 Difference]: Finished difference Result 2025 states and 5942 transitions. [2021-03-10 21:23:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:23:43,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 18 [2021-03-10 21:23:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:43,299 INFO L225 Difference]: With dead ends: 2025 [2021-03-10 21:23:43,299 INFO L226 Difference]: Without dead ends: 2023 [2021-03-10 21:23:43,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:23:43,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-03-10 21:23:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1929. [2021-03-10 21:23:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 3.0264522821576763) internal successors, (5835), 1928 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:43,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 5835 transitions. [2021-03-10 21:23:43,319 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 5835 transitions. Word has length 18 [2021-03-10 21:23:43,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:43,319 INFO L480 AbstractCegarLoop]: Abstraction has 1929 states and 5835 transitions. [2021-03-10 21:23:43,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21:23:43,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 5835 transitions. [2021-03-10 21:23:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:43,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:43,321 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:43,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:43,521 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:43,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1123161098, now seen corresponding path program 83 times [2021-03-10 21:23:43,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:43,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285392642] [2021-03-10 21:23:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:43,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285392642] [2021-03-10 21:23:43,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197113478] [2021-03-10 21:23:43,575 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 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 21:23:43,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:23:43,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:43,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:43,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:43,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:43,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-03-10 21:23:43,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064069768] [2021-03-10 21:23:43,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:43,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:43,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:43,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:43,631 INFO L87 Difference]: Start difference. First operand 1929 states and 5835 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21:23:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:43,731 INFO L93 Difference]: Finished difference Result 2077 states and 6079 transitions. [2021-03-10 21:23:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 18 [2021-03-10 21:23:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:43,733 INFO L225 Difference]: With dead ends: 2077 [2021-03-10 21:23:43,733 INFO L226 Difference]: Without dead ends: 2077 [2021-03-10 21:23:43,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:23:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-03-10 21:23:43,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1931. [2021-03-10 21:23:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 3.0264248704663212) internal successors, (5841), 1930 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5841 transitions. [2021-03-10 21:23:43,753 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5841 transitions. Word has length 18 [2021-03-10 21:23:43,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:43,753 INFO L480 AbstractCegarLoop]: Abstraction has 1931 states and 5841 transitions. [2021-03-10 21:23:43,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21:23:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5841 transitions. [2021-03-10 21:23:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:43,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:43,755 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:43,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-03-10 21:23:43,956 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:43,956 INFO L82 PathProgramCache]: Analyzing trace with hash -605886236, now seen corresponding path program 84 times [2021-03-10 21:23:43,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:43,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675205104] [2021-03-10 21:23:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:44,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675205104] [2021-03-10 21:23:44,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699319596] [2021-03-10 21:23:44,011 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 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 21:23:44,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:44,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:44,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:44,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:44,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:44,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-03-10 21:23:44,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219458193] [2021-03-10 21:23:44,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:44,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:44,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:44,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:44,083 INFO L87 Difference]: Start difference. First operand 1931 states and 5841 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21:23:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:44,222 INFO L93 Difference]: Finished difference Result 2122 states and 6197 transitions. [2021-03-10 21:23:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:23:44,222 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 18 [2021-03-10 21:23:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:44,224 INFO L225 Difference]: With dead ends: 2122 [2021-03-10 21:23:44,224 INFO L226 Difference]: Without dead ends: 2122 [2021-03-10 21:23:44,224 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-03-10 21:23:44,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1939. [2021-03-10 21:23:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.026315789473684) internal successors, (5865), 1938 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5865 transitions. [2021-03-10 21:23:44,245 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5865 transitions. Word has length 18 [2021-03-10 21:23:44,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:44,245 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 5865 transitions. [2021-03-10 21:23:44,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21:23:44,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5865 transitions. [2021-03-10 21:23:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:44,246 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:44,247 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:44,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-03-10 21:23:44,447 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:44,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1628221258, now seen corresponding path program 85 times [2021-03-10 21:23:44,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:44,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748534263] [2021-03-10 21:23:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:44,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748534263] [2021-03-10 21:23:44,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218559946] [2021-03-10 21:23:44,499 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 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 21:23:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:44,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:44,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:44,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:44,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-03-10 21:23:44,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572217421] [2021-03-10 21:23:44,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:44,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:44,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:44,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:44,559 INFO L87 Difference]: Start difference. First operand 1939 states and 5865 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21:23:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:44,684 INFO L93 Difference]: Finished difference Result 2505 states and 7377 transitions. [2021-03-10 21:23:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:44,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 18 [2021-03-10 21:23:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:44,687 INFO L225 Difference]: With dead ends: 2505 [2021-03-10 21:23:44,687 INFO L226 Difference]: Without dead ends: 2505 [2021-03-10 21:23:44,687 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-03-10 21:23:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2323. [2021-03-10 21:23:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 3.0353143841515933) internal successors, (7048), 2322 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 7048 transitions. [2021-03-10 21:23:44,711 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 7048 transitions. Word has length 18 [2021-03-10 21:23:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:44,711 INFO L480 AbstractCegarLoop]: Abstraction has 2323 states and 7048 transitions. [2021-03-10 21:23:44,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21:23:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 7048 transitions. [2021-03-10 21:23:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:44,713 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:44,713 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:44,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-03-10 21:23:44,913 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:44,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:44,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2128890460, now seen corresponding path program 86 times [2021-03-10 21:23:44,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:44,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247199258] [2021-03-10 21:23:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:44,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247199258] [2021-03-10 21:23:44,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522634323] [2021-03-10 21:23:44,974 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 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 21:23:44,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:44,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:44,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:44,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:45,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:45,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-03-10 21:23:45,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153011024] [2021-03-10 21:23:45,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:45,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:45,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:45,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:45,036 INFO L87 Difference]: Start difference. First operand 2323 states and 7048 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21:23:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:45,194 INFO L93 Difference]: Finished difference Result 2489 states and 7427 transitions. [2021-03-10 21:23:45,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:45,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 18 [2021-03-10 21:23:45,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:45,197 INFO L225 Difference]: With dead ends: 2489 [2021-03-10 21:23:45,197 INFO L226 Difference]: Without dead ends: 2489 [2021-03-10 21:23:45,197 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:23:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-03-10 21:23:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2409. [2021-03-10 21:23:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 3.034468438538206) internal successors, (7307), 2408 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 7307 transitions. [2021-03-10 21:23:45,223 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 7307 transitions. Word has length 18 [2021-03-10 21:23:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:45,223 INFO L480 AbstractCegarLoop]: Abstraction has 2409 states and 7307 transitions. [2021-03-10 21:23:45,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21:23:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 7307 transitions. [2021-03-10 21:23:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:45,225 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:45,225 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:45,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-03-10 21:23:45,440 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:45,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:45,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1659730570, now seen corresponding path program 87 times [2021-03-10 21:23:45,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:45,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470578585] [2021-03-10 21:23:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:45,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470578585] [2021-03-10 21:23:45,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068536377] [2021-03-10 21:23:45,494 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 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 21:23:45,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:45,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:45,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:45,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:45,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 21:23:45,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103322429] [2021-03-10 21:23:45,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:23:45,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:45,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:23:45,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:45,561 INFO L87 Difference]: Start difference. First operand 2409 states and 7307 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21:23:45,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:45,759 INFO L93 Difference]: Finished difference Result 2555 states and 7581 transitions. [2021-03-10 21:23:45,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:23:45,760 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 18 [2021-03-10 21:23:45,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:45,762 INFO L225 Difference]: With dead ends: 2555 [2021-03-10 21:23:45,762 INFO L226 Difference]: Without dead ends: 2555 [2021-03-10 21:23:45,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:23:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-03-10 21:23:45,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2408. [2021-03-10 21:23:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 3.0344827586206895) internal successors, (7304), 2407 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 7304 transitions. [2021-03-10 21:23:45,785 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 7304 transitions. Word has length 18 [2021-03-10 21:23:45,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:45,785 INFO L480 AbstractCegarLoop]: Abstraction has 2408 states and 7304 transitions. [2021-03-10 21:23:45,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21:23:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 7304 transitions. [2021-03-10 21:23:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:45,787 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:45,787 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:45,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:45,988 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:45,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1152101788, now seen corresponding path program 88 times [2021-03-10 21:23:45,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:45,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210893712] [2021-03-10 21:23:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:46,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210893712] [2021-03-10 21:23:46,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221159543] [2021-03-10 21:23:46,054 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 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 21:23:46,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:46,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:46,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:46,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:46,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:46,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 21:23:46,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808298611] [2021-03-10 21:23:46,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:23:46,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:46,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:23:46,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:46,143 INFO L87 Difference]: Start difference. First operand 2408 states and 7304 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21:23:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:46,305 INFO L93 Difference]: Finished difference Result 2601 states and 7724 transitions. [2021-03-10 21:23:46,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:23:46,305 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 18 [2021-03-10 21:23:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:46,307 INFO L225 Difference]: With dead ends: 2601 [2021-03-10 21:23:46,307 INFO L226 Difference]: Without dead ends: 2601 [2021-03-10 21:23:46,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:23:46,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-03-10 21:23:46,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2436. [2021-03-10 21:23:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 3.0340862422997947) internal successors, (7388), 2435 states have internal predecessors, (7388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 7388 transitions. [2021-03-10 21:23:46,331 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 7388 transitions. Word has length 18 [2021-03-10 21:23:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:46,331 INFO L480 AbstractCegarLoop]: Abstraction has 2436 states and 7388 transitions. [2021-03-10 21:23:46,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21:23:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 7388 transitions. [2021-03-10 21:23:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:46,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:46,333 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:46,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:46,533 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:46,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1875408330, now seen corresponding path program 89 times [2021-03-10 21:23:46,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:46,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968444130] [2021-03-10 21:23:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:46,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968444130] [2021-03-10 21:23:46,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466840693] [2021-03-10 21:23:46,600 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 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 21:23:46,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:23:46,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:46,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:46,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:46,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:46,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 21:23:46,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793379193] [2021-03-10 21:23:46,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:23:46,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:46,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:23:46,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:46,675 INFO L87 Difference]: Start difference. First operand 2436 states and 7388 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:23:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:46,913 INFO L93 Difference]: Finished difference Result 2926 states and 8621 transitions. [2021-03-10 21:23:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:23:46,913 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 18 [2021-03-10 21:23:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:46,916 INFO L225 Difference]: With dead ends: 2926 [2021-03-10 21:23:46,916 INFO L226 Difference]: Without dead ends: 2926 [2021-03-10 21:23:46,916 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:23:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-03-10 21:23:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2460. [2021-03-10 21:23:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 3.0337535583570556) internal successors, (7460), 2459 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 7460 transitions. [2021-03-10 21:23:46,948 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 7460 transitions. Word has length 18 [2021-03-10 21:23:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:46,948 INFO L480 AbstractCegarLoop]: Abstraction has 2460 states and 7460 transitions. [2021-03-10 21:23:46,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:23:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 7460 transitions. [2021-03-10 21:23:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:46,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:46,951 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:47,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-03-10 21:23:47,151 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:47,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:47,151 INFO L82 PathProgramCache]: Analyzing trace with hash -892568151, now seen corresponding path program 90 times [2021-03-10 21:23:47,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:47,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095193314] [2021-03-10 21:23:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:47,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095193314] [2021-03-10 21:23:47,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273643136] [2021-03-10 21:23:47,222 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 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 21:23:47,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:23:47,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:47,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:47,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:47,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:47,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-03-10 21:23:47,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503261888] [2021-03-10 21:23:47,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:23:47,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:47,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:23:47,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:47,296 INFO L87 Difference]: Start difference. First operand 2460 states and 7460 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) 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 21:23:47,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:47,441 INFO L93 Difference]: Finished difference Result 2653 states and 7746 transitions. [2021-03-10 21:23:47,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:23:47,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) 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 20 [2021-03-10 21:23:47,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:47,444 INFO L225 Difference]: With dead ends: 2653 [2021-03-10 21:23:47,444 INFO L226 Difference]: Without dead ends: 2647 [2021-03-10 21:23:47,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:23:47,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2021-03-10 21:23:47,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2452. [2021-03-10 21:23:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.025703794369645) internal successors, (7416), 2451 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7416 transitions. [2021-03-10 21:23:47,468 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7416 transitions. Word has length 20 [2021-03-10 21:23:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:47,468 INFO L480 AbstractCegarLoop]: Abstraction has 2452 states and 7416 transitions. [2021-03-10 21:23:47,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) 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 21:23:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7416 transitions. [2021-03-10 21:23:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:47,470 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:47,470 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:47,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:47,672 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:47,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:47,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1250996055, now seen corresponding path program 91 times [2021-03-10 21:23:47,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:47,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640522588] [2021-03-10 21:23:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:47,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640522588] [2021-03-10 21:23:47,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092346195] [2021-03-10 21:23:47,728 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 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 21:23:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:47,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:47,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:47,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:47,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-03-10 21:23:47,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042178026] [2021-03-10 21:23:47,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:47,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:47,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:47,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:47,775 INFO L87 Difference]: Start difference. First operand 2452 states and 7416 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21:23:47,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:47,880 INFO L93 Difference]: Finished difference Result 2499 states and 7508 transitions. [2021-03-10 21:23:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:47,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 20 [2021-03-10 21:23:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:47,882 INFO L225 Difference]: With dead ends: 2499 [2021-03-10 21:23:47,882 INFO L226 Difference]: Without dead ends: 2498 [2021-03-10 21:23:47,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:47,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-03-10 21:23:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2452. [2021-03-10 21:23:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.0244798041615666) internal successors, (7413), 2451 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7413 transitions. [2021-03-10 21:23:47,912 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7413 transitions. Word has length 20 [2021-03-10 21:23:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:47,912 INFO L480 AbstractCegarLoop]: Abstraction has 2452 states and 7413 transitions. [2021-03-10 21:23:47,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21:23:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7413 transitions. [2021-03-10 21:23:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:47,915 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:47,915 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:48,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:48,130 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:48,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:48,131 INFO L82 PathProgramCache]: Analyzing trace with hash 412854133, now seen corresponding path program 92 times [2021-03-10 21:23:48,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:48,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725835806] [2021-03-10 21:23:48,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:48,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725835806] [2021-03-10 21:23:48,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499107909] [2021-03-10 21:23:48,171 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 21:23:48,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:48,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:48,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:48,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:23:48,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:48,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-03-10 21:23:48,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778808985] [2021-03-10 21:23:48,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:48,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:48,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:48,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:48,224 INFO L87 Difference]: Start difference. First operand 2452 states and 7413 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) 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 21:23:48,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:48,302 INFO L93 Difference]: Finished difference Result 2670 states and 7781 transitions. [2021-03-10 21:23:48,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:48,302 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) 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 20 [2021-03-10 21:23:48,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:48,305 INFO L225 Difference]: With dead ends: 2670 [2021-03-10 21:23:48,305 INFO L226 Difference]: Without dead ends: 2670 [2021-03-10 21:23:48,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:48,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-03-10 21:23:48,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2472. [2021-03-10 21:23:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 3.0145690004046943) internal successors, (7449), 2471 states have internal predecessors, (7449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7449 transitions. [2021-03-10 21:23:48,331 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7449 transitions. Word has length 20 [2021-03-10 21:23:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:48,332 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 7449 transitions. [2021-03-10 21:23:48,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) 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 21:23:48,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7449 transitions. [2021-03-10 21:23:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:48,334 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:48,334 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:48,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:48,539 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:48,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:48,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1063359831, now seen corresponding path program 93 times [2021-03-10 21:23:48,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:48,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300396961] [2021-03-10 21:23:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:48,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300396961] [2021-03-10 21:23:48,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741147363] [2021-03-10 21:23:48,586 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 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 21:23:48,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:23:48,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:48,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:23:48,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:48,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:48,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:23:48,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436990923] [2021-03-10 21:23:48,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:48,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:48,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:48,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:48,650 INFO L87 Difference]: Start difference. First operand 2472 states and 7449 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21:23:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:48,785 INFO L93 Difference]: Finished difference Result 2616 states and 7646 transitions. [2021-03-10 21:23:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:23:48,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-03-10 21:23:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:48,788 INFO L225 Difference]: With dead ends: 2616 [2021-03-10 21:23:48,788 INFO L226 Difference]: Without dead ends: 2608 [2021-03-10 21:23:48,788 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-03-10 21:23:48,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2441. [2021-03-10 21:23:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.018032786885246) internal successors, (7364), 2440 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7364 transitions. [2021-03-10 21:23:48,820 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7364 transitions. Word has length 20 [2021-03-10 21:23:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:48,820 INFO L480 AbstractCegarLoop]: Abstraction has 2441 states and 7364 transitions. [2021-03-10 21:23:48,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21:23:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7364 transitions. [2021-03-10 21:23:48,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:48,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:48,822 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:49,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:49,023 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:49,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:49,023 INFO L82 PathProgramCache]: Analyzing trace with hash -9725549, now seen corresponding path program 94 times [2021-03-10 21:23:49,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:49,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850479882] [2021-03-10 21:23:49,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:49,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850479882] [2021-03-10 21:23:49,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216024663] [2021-03-10 21:23:49,080 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 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 21:23:49,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:49,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:49,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:49,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:49,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:49,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-03-10 21:23:49,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650892528] [2021-03-10 21:23:49,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:49,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:49,139 INFO L87 Difference]: Start difference. First operand 2441 states and 7364 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:49,279 INFO L93 Difference]: Finished difference Result 2536 states and 7516 transitions. [2021-03-10 21:23:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:23:49,280 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-03-10 21:23:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:49,284 INFO L225 Difference]: With dead ends: 2536 [2021-03-10 21:23:49,284 INFO L226 Difference]: Without dead ends: 2531 [2021-03-10 21:23:49,284 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:49,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-03-10 21:23:49,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2441. [2021-03-10 21:23:49,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.015573770491803) internal successors, (7358), 2440 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7358 transitions. [2021-03-10 21:23:49,307 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7358 transitions. Word has length 20 [2021-03-10 21:23:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:49,307 INFO L480 AbstractCegarLoop]: Abstraction has 2441 states and 7358 transitions. [2021-03-10 21:23:49,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:49,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7358 transitions. [2021-03-10 21:23:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:49,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:49,309 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:49,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-03-10 21:23:49,510 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:49,510 INFO L82 PathProgramCache]: Analyzing trace with hash -856557433, now seen corresponding path program 95 times [2021-03-10 21:23:49,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:49,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155337863] [2021-03-10 21:23:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:49,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155337863] [2021-03-10 21:23:49,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644125109] [2021-03-10 21:23:49,550 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 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 21:23:49,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:23:49,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:49,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:49,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:23:49,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:49,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-03-10 21:23:49,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165140635] [2021-03-10 21:23:49,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:49,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:49,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:49,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:49,638 INFO L87 Difference]: Start difference. First operand 2441 states and 7358 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) 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 21:23:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:49,703 INFO L93 Difference]: Finished difference Result 2646 states and 7683 transitions. [2021-03-10 21:23:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:49,704 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) 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 20 [2021-03-10 21:23:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:49,706 INFO L225 Difference]: With dead ends: 2646 [2021-03-10 21:23:49,706 INFO L226 Difference]: Without dead ends: 2644 [2021-03-10 21:23:49,706 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-03-10 21:23:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2425. [2021-03-10 21:23:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 3.007838283828383) internal successors, (7291), 2424 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7291 transitions. [2021-03-10 21:23:49,729 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7291 transitions. Word has length 20 [2021-03-10 21:23:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:49,729 INFO L480 AbstractCegarLoop]: Abstraction has 2425 states and 7291 transitions. [2021-03-10 21:23:49,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) 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 21:23:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7291 transitions. [2021-03-10 21:23:49,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:49,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:49,731 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:49,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-03-10 21:23:49,932 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:49,932 INFO L82 PathProgramCache]: Analyzing trace with hash -206051735, now seen corresponding path program 96 times [2021-03-10 21:23:49,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:49,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109337654] [2021-03-10 21:23:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:49,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109337654] [2021-03-10 21:23:49,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809076222] [2021-03-10 21:23:49,991 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 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 21:23:50,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:23:50,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:50,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:50,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:50,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:50,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-03-10 21:23:50,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731676474] [2021-03-10 21:23:50,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:50,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:50,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:50,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:50,042 INFO L87 Difference]: Start difference. First operand 2425 states and 7291 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21:23:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:50,150 INFO L93 Difference]: Finished difference Result 2573 states and 7502 transitions. [2021-03-10 21:23:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:23:50,150 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 20 [2021-03-10 21:23:50,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:50,152 INFO L225 Difference]: With dead ends: 2573 [2021-03-10 21:23:50,152 INFO L226 Difference]: Without dead ends: 2568 [2021-03-10 21:23:50,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:23:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-03-10 21:23:50,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2418. [2021-03-10 21:23:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 3.00330988829127) internal successors, (7259), 2417 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7259 transitions. [2021-03-10 21:23:50,175 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7259 transitions. Word has length 20 [2021-03-10 21:23:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:50,175 INFO L480 AbstractCegarLoop]: Abstraction has 2418 states and 7259 transitions. [2021-03-10 21:23:50,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21:23:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7259 transitions. [2021-03-10 21:23:50,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:50,177 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:50,177 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:50,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-03-10 21:23:50,378 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:50,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:50,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1279137115, now seen corresponding path program 97 times [2021-03-10 21:23:50,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:50,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50027413] [2021-03-10 21:23:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:50,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50027413] [2021-03-10 21:23:50,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010526139] [2021-03-10 21:23:50,428 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:50,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:50,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:50,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:50,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-03-10 21:23:50,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111134030] [2021-03-10 21:23:50,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:50,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:50,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:50,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:50,480 INFO L87 Difference]: Start difference. First operand 2418 states and 7259 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:50,601 INFO L93 Difference]: Finished difference Result 2568 states and 7475 transitions. [2021-03-10 21:23:50,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:23:50,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-03-10 21:23:50,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:50,603 INFO L225 Difference]: With dead ends: 2568 [2021-03-10 21:23:50,603 INFO L226 Difference]: Without dead ends: 2563 [2021-03-10 21:23:50,604 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:23:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-03-10 21:23:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2418. [2021-03-10 21:23:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.9975175837815473) internal successors, (7245), 2417 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7245 transitions. [2021-03-10 21:23:50,628 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7245 transitions. Word has length 20 [2021-03-10 21:23:50,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:50,628 INFO L480 AbstractCegarLoop]: Abstraction has 2418 states and 7245 transitions. [2021-03-10 21:23:50,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7245 transitions. [2021-03-10 21:23:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:50,630 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:50,630 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:50,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable477,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:50,843 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:50,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:50,843 INFO L82 PathProgramCache]: Analyzing trace with hash -185045527, now seen corresponding path program 98 times [2021-03-10 21:23:50,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:50,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816116070] [2021-03-10 21:23:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:50,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816116070] [2021-03-10 21:23:50,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822452265] [2021-03-10 21:23:50,906 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) [2021-03-10 21:23:50,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:50,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:50,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:50,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:50,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:50,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-03-10 21:23:50,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802625754] [2021-03-10 21:23:50,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:50,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:50,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:50,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:50,958 INFO L87 Difference]: Start difference. First operand 2418 states and 7245 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:51,060 INFO L93 Difference]: Finished difference Result 2556 states and 7520 transitions. [2021-03-10 21:23:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:51,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-03-10 21:23:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:51,063 INFO L225 Difference]: With dead ends: 2556 [2021-03-10 21:23:51,063 INFO L226 Difference]: Without dead ends: 2553 [2021-03-10 21:23:51,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-03-10 21:23:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2418. [2021-03-10 21:23:51,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.99669011170873) internal successors, (7243), 2417 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7243 transitions. [2021-03-10 21:23:51,088 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7243 transitions. Word has length 20 [2021-03-10 21:23:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:51,088 INFO L480 AbstractCegarLoop]: Abstraction has 2418 states and 7243 transitions. [2021-03-10 21:23:51,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7243 transitions. [2021-03-10 21:23:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:51,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:51,090 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:51,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-03-10 21:23:51,303 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:51,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:51,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1553610315, now seen corresponding path program 99 times [2021-03-10 21:23:51,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:51,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044481932] [2021-03-10 21:23:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:51,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044481932] [2021-03-10 21:23:51,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292445498] [2021-03-10 21:23:51,342 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 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 21:23:51,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:23:51,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:51,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:23:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:51,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:51,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:51,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454748106] [2021-03-10 21:23:51,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:51,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:51,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:51,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:51,401 INFO L87 Difference]: Start difference. First operand 2418 states and 7243 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:51,452 INFO L93 Difference]: Finished difference Result 2583 states and 7523 transitions. [2021-03-10 21:23:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:51,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 20 [2021-03-10 21:23:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:51,454 INFO L225 Difference]: With dead ends: 2583 [2021-03-10 21:23:51,454 INFO L226 Difference]: Without dead ends: 2581 [2021-03-10 21:23:51,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-03-10 21:23:51,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2419. [2021-03-10 21:23:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.9971050454921424) internal successors, (7247), 2418 states have internal predecessors, (7247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 7247 transitions. [2021-03-10 21:23:51,477 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 7247 transitions. Word has length 20 [2021-03-10 21:23:51,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:51,477 INFO L480 AbstractCegarLoop]: Abstraction has 2419 states and 7247 transitions. [2021-03-10 21:23:51,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 21:23:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 7247 transitions. [2021-03-10 21:23:51,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:51,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:51,479 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:51,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:51,680 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:51,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:51,680 INFO L82 PathProgramCache]: Analyzing trace with hash 191844375, now seen corresponding path program 100 times [2021-03-10 21:23:51,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:51,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586013195] [2021-03-10 21:23:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:51,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586013195] [2021-03-10 21:23:51,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805086226] [2021-03-10 21:23:51,718 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 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 21:23:51,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:51,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:51,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:51,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:51,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:51,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-03-10 21:23:51,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830649148] [2021-03-10 21:23:51,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:51,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:51,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:51,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:51,769 INFO L87 Difference]: Start difference. First operand 2419 states and 7247 transitions. Second operand has 12 states, 12 states have (on average 2.0) 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 21:23:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:51,836 INFO L93 Difference]: Finished difference Result 2556 states and 7442 transitions. [2021-03-10 21:23:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:51,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) 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 20 [2021-03-10 21:23:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:51,838 INFO L225 Difference]: With dead ends: 2556 [2021-03-10 21:23:51,839 INFO L226 Difference]: Without dead ends: 2556 [2021-03-10 21:23:51,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-03-10 21:23:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2398. [2021-03-10 21:23:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 2.994993742177722) internal successors, (7179), 2397 states have internal predecessors, (7179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 7179 transitions. [2021-03-10 21:23:51,863 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 7179 transitions. Word has length 20 [2021-03-10 21:23:51,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:51,863 INFO L480 AbstractCegarLoop]: Abstraction has 2398 states and 7179 transitions. [2021-03-10 21:23:51,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) 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 21:23:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 7179 transitions. [2021-03-10 21:23:51,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:51,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:51,865 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:52,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-03-10 21:23:52,083 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:52,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:52,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1902457683, now seen corresponding path program 101 times [2021-03-10 21:23:52,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:52,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392994324] [2021-03-10 21:23:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:52,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392994324] [2021-03-10 21:23:52,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197283601] [2021-03-10 21:23:52,140 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 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 21:23:52,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:23:52,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:52,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:52,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:23:52,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:52,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-03-10 21:23:52,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631507464] [2021-03-10 21:23:52,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:52,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:52,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:52,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:52,194 INFO L87 Difference]: Start difference. First operand 2398 states and 7179 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21:23:52,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:52,253 INFO L93 Difference]: Finished difference Result 2533 states and 7366 transitions. [2021-03-10 21:23:52,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:52,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 20 [2021-03-10 21:23:52,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:52,256 INFO L225 Difference]: With dead ends: 2533 [2021-03-10 21:23:52,256 INFO L226 Difference]: Without dead ends: 2533 [2021-03-10 21:23:52,256 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:52,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-03-10 21:23:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2394. [2021-03-10 21:23:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2393 states have (on average 2.990388633514417) internal successors, (7156), 2393 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:52,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 7156 transitions. [2021-03-10 21:23:52,279 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 7156 transitions. Word has length 20 [2021-03-10 21:23:52,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:52,280 INFO L480 AbstractCegarLoop]: Abstraction has 2394 states and 7156 transitions. [2021-03-10 21:23:52,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21:23:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 7156 transitions. [2021-03-10 21:23:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:52,281 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:52,281 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:52,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:52,482 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:52,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:52,482 INFO L82 PathProgramCache]: Analyzing trace with hash -903104617, now seen corresponding path program 102 times [2021-03-10 21:23:52,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:52,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340983022] [2021-03-10 21:23:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:52,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340983022] [2021-03-10 21:23:52,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121919388] [2021-03-10 21:23:52,539 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 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 21:23:52,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:23:52,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:52,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:52,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:23:52,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:52,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-03-10 21:23:52,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770751405] [2021-03-10 21:23:52,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:52,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:52,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:52,585 INFO L87 Difference]: Start difference. First operand 2394 states and 7156 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21:23:52,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:52,679 INFO L93 Difference]: Finished difference Result 2537 states and 7365 transitions. [2021-03-10 21:23:52,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:52,679 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 20 [2021-03-10 21:23:52,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:52,681 INFO L225 Difference]: With dead ends: 2537 [2021-03-10 21:23:52,681 INFO L226 Difference]: Without dead ends: 2534 [2021-03-10 21:23:52,681 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-03-10 21:23:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2390. [2021-03-10 21:23:52,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9824194223524487) internal successors, (7125), 2389 states have internal predecessors, (7125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:52,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7125 transitions. [2021-03-10 21:23:52,715 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7125 transitions. Word has length 20 [2021-03-10 21:23:52,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:52,715 INFO L480 AbstractCegarLoop]: Abstraction has 2390 states and 7125 transitions. [2021-03-10 21:23:52,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21:23:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7125 transitions. [2021-03-10 21:23:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:52,717 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:52,717 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:52,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:52,917 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:52,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1976189997, now seen corresponding path program 103 times [2021-03-10 21:23:52,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:52,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783234500] [2021-03-10 21:23:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:52,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783234500] [2021-03-10 21:23:52,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145384856] [2021-03-10 21:23:52,975 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 21:23:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:52,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:52,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:53,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:53,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-03-10 21:23:53,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973287875] [2021-03-10 21:23:53,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:53,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:53,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:53,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:53,020 INFO L87 Difference]: Start difference. First operand 2390 states and 7125 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:53,129 INFO L93 Difference]: Finished difference Result 2538 states and 7340 transitions. [2021-03-10 21:23:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:23:53,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-03-10 21:23:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:53,131 INFO L225 Difference]: With dead ends: 2538 [2021-03-10 21:23:53,131 INFO L226 Difference]: Without dead ends: 2533 [2021-03-10 21:23:53,132 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-03-10 21:23:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2390. [2021-03-10 21:23:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.973629133528673) internal successors, (7104), 2389 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7104 transitions. [2021-03-10 21:23:53,154 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7104 transitions. Word has length 20 [2021-03-10 21:23:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:53,154 INFO L480 AbstractCegarLoop]: Abstraction has 2390 states and 7104 transitions. [2021-03-10 21:23:53,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7104 transitions. [2021-03-10 21:23:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:53,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:53,156 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:53,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-03-10 21:23:53,371 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:53,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:53,371 INFO L82 PathProgramCache]: Analyzing trace with hash -882098409, now seen corresponding path program 104 times [2021-03-10 21:23:53,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:53,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628978518] [2021-03-10 21:23:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:53,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628978518] [2021-03-10 21:23:53,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609653656] [2021-03-10 21:23:53,429 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 21:23:53,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:53,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:53,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:53,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:53,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:53,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-03-10 21:23:53,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721075688] [2021-03-10 21:23:53,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:53,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:53,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:53,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:53,475 INFO L87 Difference]: Start difference. First operand 2390 states and 7104 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:53,591 INFO L93 Difference]: Finished difference Result 2545 states and 7407 transitions. [2021-03-10 21:23:53,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:53,591 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-03-10 21:23:53,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:53,593 INFO L225 Difference]: With dead ends: 2545 [2021-03-10 21:23:53,593 INFO L226 Difference]: Without dead ends: 2542 [2021-03-10 21:23:53,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:53,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-03-10 21:23:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2390. [2021-03-10 21:23:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9732105483465885) internal successors, (7103), 2389 states have internal predecessors, (7103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:53,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7103 transitions. [2021-03-10 21:23:53,617 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7103 transitions. Word has length 20 [2021-03-10 21:23:53,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:53,617 INFO L480 AbstractCegarLoop]: Abstraction has 2390 states and 7103 transitions. [2021-03-10 21:23:53,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:53,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7103 transitions. [2021-03-10 21:23:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:53,631 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:53,631 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:53,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:53,847 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:53,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:53,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1324997549, now seen corresponding path program 105 times [2021-03-10 21:23:53,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:53,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940681025] [2021-03-10 21:23:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:53,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940681025] [2021-03-10 21:23:53,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033855447] [2021-03-10 21:23:53,916 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 21:23:53,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:23:53,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:53,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:23:53,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:53,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:53,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:23:53,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894165883] [2021-03-10 21:23:53,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:53,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:53,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:53,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:53,974 INFO L87 Difference]: Start difference. First operand 2390 states and 7103 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:23:54,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:54,100 INFO L93 Difference]: Finished difference Result 2536 states and 7394 transitions. [2021-03-10 21:23:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:54,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:23:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:54,102 INFO L225 Difference]: With dead ends: 2536 [2021-03-10 21:23:54,102 INFO L226 Difference]: Without dead ends: 2532 [2021-03-10 21:23:54,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-03-10 21:23:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2390. [2021-03-10 21:23:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.972791963164504) internal successors, (7102), 2389 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7102 transitions. [2021-03-10 21:23:54,124 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7102 transitions. Word has length 20 [2021-03-10 21:23:54,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:54,124 INFO L480 AbstractCegarLoop]: Abstraction has 2390 states and 7102 transitions. [2021-03-10 21:23:54,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:23:54,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7102 transitions. [2021-03-10 21:23:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:54,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:54,126 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:54,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:54,326 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:54,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:54,326 INFO L82 PathProgramCache]: Analyzing trace with hash 774024681, now seen corresponding path program 106 times [2021-03-10 21:23:54,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:54,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998779689] [2021-03-10 21:23:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:54,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998779689] [2021-03-10 21:23:54,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827075387] [2021-03-10 21:23:54,371 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 21:23:54,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:54,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:54,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:23:54,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:54,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:54,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:54,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41171964] [2021-03-10 21:23:54,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:54,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:54,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:54,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:54,426 INFO L87 Difference]: Start difference. First operand 2390 states and 7102 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:54,506 INFO L93 Difference]: Finished difference Result 2507 states and 7304 transitions. [2021-03-10 21:23:54,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:54,506 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 20 [2021-03-10 21:23:54,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:54,509 INFO L225 Difference]: With dead ends: 2507 [2021-03-10 21:23:54,509 INFO L226 Difference]: Without dead ends: 2507 [2021-03-10 21:23:54,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-03-10 21:23:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2391. [2021-03-10 21:23:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9728033472803346) internal successors, (7105), 2390 states have internal predecessors, (7105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:54,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7105 transitions. [2021-03-10 21:23:54,534 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7105 transitions. Word has length 20 [2021-03-10 21:23:54,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:54,534 INFO L480 AbstractCegarLoop]: Abstraction has 2391 states and 7105 transitions. [2021-03-10 21:23:54,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:23:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7105 transitions. [2021-03-10 21:23:54,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:54,536 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:54,536 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:54,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-03-10 21:23:54,751 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:54,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:54,751 INFO L82 PathProgramCache]: Analyzing trace with hash 888022761, now seen corresponding path program 107 times [2021-03-10 21:23:54,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:54,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674589841] [2021-03-10 21:23:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:54,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674589841] [2021-03-10 21:23:54,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77263324] [2021-03-10 21:23:54,806 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 21:23:54,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:23:54,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:54,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:23:54,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:54,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:54,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:23:54,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779620581] [2021-03-10 21:23:54,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:54,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:54,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:54,859 INFO L87 Difference]: Start difference. First operand 2391 states and 7105 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 21:23:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:54,960 INFO L93 Difference]: Finished difference Result 2530 states and 7380 transitions. [2021-03-10 21:23:54,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:23:54,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 20 [2021-03-10 21:23:54,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:54,963 INFO L225 Difference]: With dead ends: 2530 [2021-03-10 21:23:54,963 INFO L226 Difference]: Without dead ends: 2527 [2021-03-10 21:23:54,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:54,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-03-10 21:23:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2391. [2021-03-10 21:23:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.971548117154812) internal successors, (7102), 2390 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7102 transitions. [2021-03-10 21:23:54,985 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7102 transitions. Word has length 20 [2021-03-10 21:23:54,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:54,985 INFO L480 AbstractCegarLoop]: Abstraction has 2391 states and 7102 transitions. [2021-03-10 21:23:54,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 21:23:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7102 transitions. [2021-03-10 21:23:54,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:54,986 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:54,986 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:55,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-03-10 21:23:55,187 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:55,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:55,187 INFO L82 PathProgramCache]: Analyzing trace with hash -379434417, now seen corresponding path program 108 times [2021-03-10 21:23:55,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:55,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101866436] [2021-03-10 21:23:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:55,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101866436] [2021-03-10 21:23:55,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875440491] [2021-03-10 21:23:55,242 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 21:23:55,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:55,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:55,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:55,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:55,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:55,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-03-10 21:23:55,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504228493] [2021-03-10 21:23:55,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:55,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:55,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:55,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:55,291 INFO L87 Difference]: Start difference. First operand 2391 states and 7102 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:55,397 INFO L93 Difference]: Finished difference Result 2601 states and 7491 transitions. [2021-03-10 21:23:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:55,398 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-03-10 21:23:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:55,400 INFO L225 Difference]: With dead ends: 2601 [2021-03-10 21:23:55,400 INFO L226 Difference]: Without dead ends: 2598 [2021-03-10 21:23:55,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-03-10 21:23:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2391. [2021-03-10 21:23:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9673640167364015) internal successors, (7092), 2390 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7092 transitions. [2021-03-10 21:23:55,423 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7092 transitions. Word has length 20 [2021-03-10 21:23:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:55,423 INFO L480 AbstractCegarLoop]: Abstraction has 2391 states and 7092 transitions. [2021-03-10 21:23:55,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:55,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7092 transitions. [2021-03-10 21:23:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:55,425 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:55,425 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:55,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-03-10 21:23:55,625 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:55,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:55,625 INFO L82 PathProgramCache]: Analyzing trace with hash -822333557, now seen corresponding path program 109 times [2021-03-10 21:23:55,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:55,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9775654] [2021-03-10 21:23:55,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:55,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9775654] [2021-03-10 21:23:55,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037914906] [2021-03-10 21:23:55,685 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 21:23:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:55,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:55,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:55,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:55,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-03-10 21:23:55,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690840871] [2021-03-10 21:23:55,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:55,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:55,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:55,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:55,731 INFO L87 Difference]: Start difference. First operand 2391 states and 7092 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:55,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:55,843 INFO L93 Difference]: Finished difference Result 2612 states and 7532 transitions. [2021-03-10 21:23:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:55,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-03-10 21:23:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:55,845 INFO L225 Difference]: With dead ends: 2612 [2021-03-10 21:23:55,845 INFO L226 Difference]: Without dead ends: 2604 [2021-03-10 21:23:55,845 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:23:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-03-10 21:23:55,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2396. [2021-03-10 21:23:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 2.9649269311064717) internal successors, (7101), 2395 states have internal predecessors, (7101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 7101 transitions. [2021-03-10 21:23:55,868 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 7101 transitions. Word has length 20 [2021-03-10 21:23:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:55,868 INFO L480 AbstractCegarLoop]: Abstraction has 2396 states and 7101 transitions. [2021-03-10 21:23:55,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 7101 transitions. [2021-03-10 21:23:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:55,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:55,869 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:56,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:56,070 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:56,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:56,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1687413177, now seen corresponding path program 110 times [2021-03-10 21:23:56,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:56,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093637223] [2021-03-10 21:23:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:56,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093637223] [2021-03-10 21:23:56,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439524285] [2021-03-10 21:23:56,107 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 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 21:23:56,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:56,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:56,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:56,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:23:56,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:56,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-03-10 21:23:56,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125835685] [2021-03-10 21:23:56,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:56,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:56,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:56,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:56,169 INFO L87 Difference]: Start difference. First operand 2396 states and 7101 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) 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 21:23:56,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:56,233 INFO L93 Difference]: Finished difference Result 2604 states and 7451 transitions. [2021-03-10 21:23:56,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:56,234 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) 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 20 [2021-03-10 21:23:56,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:56,236 INFO L225 Difference]: With dead ends: 2604 [2021-03-10 21:23:56,236 INFO L226 Difference]: Without dead ends: 2604 [2021-03-10 21:23:56,236 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-03-10 21:23:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2417. [2021-03-10 21:23:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9639900662251657) internal successors, (7161), 2416 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7161 transitions. [2021-03-10 21:23:56,259 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7161 transitions. Word has length 20 [2021-03-10 21:23:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:56,259 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7161 transitions. [2021-03-10 21:23:56,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) 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 21:23:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7161 transitions. [2021-03-10 21:23:56,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:56,261 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:56,261 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:56,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-03-10 21:23:56,474 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:56,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:56,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1036907479, now seen corresponding path program 111 times [2021-03-10 21:23:56,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:56,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519720526] [2021-03-10 21:23:56,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:56,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519720526] [2021-03-10 21:23:56,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733993133] [2021-03-10 21:23:56,521 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 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 21:23:56,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:23:56,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:56,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:23:56,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:56,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:56,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:23:56,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663020485] [2021-03-10 21:23:56,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:56,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:56,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:56,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:56,569 INFO L87 Difference]: Start difference. First operand 2417 states and 7161 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21:23:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:56,668 INFO L93 Difference]: Finished difference Result 2566 states and 7378 transitions. [2021-03-10 21:23:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:56,668 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-03-10 21:23:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:56,670 INFO L225 Difference]: With dead ends: 2566 [2021-03-10 21:23:56,670 INFO L226 Difference]: Without dead ends: 2563 [2021-03-10 21:23:56,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:56,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-03-10 21:23:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2417. [2021-03-10 21:23:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9598509933774833) internal successors, (7151), 2416 states have internal predecessors, (7151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7151 transitions. [2021-03-10 21:23:56,693 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7151 transitions. Word has length 20 [2021-03-10 21:23:56,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:56,693 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7151 transitions. [2021-03-10 21:23:56,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21:23:56,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7151 transitions. [2021-03-10 21:23:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:56,695 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:56,695 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:56,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:56,896 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:56,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2109992859, now seen corresponding path program 112 times [2021-03-10 21:23:56,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:56,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798919581] [2021-03-10 21:23:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:56,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798919581] [2021-03-10 21:23:56,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665122325] [2021-03-10 21:23:56,961 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 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 21:23:56,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:56,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:56,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:56,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:23:57,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:57,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-03-10 21:23:57,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311052348] [2021-03-10 21:23:57,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:57,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:57,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:57,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:57,018 INFO L87 Difference]: Start difference. First operand 2417 states and 7151 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:57,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:57,132 INFO L93 Difference]: Finished difference Result 2572 states and 7375 transitions. [2021-03-10 21:23:57,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:23:57,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-03-10 21:23:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:57,134 INFO L225 Difference]: With dead ends: 2572 [2021-03-10 21:23:57,134 INFO L226 Difference]: Without dead ends: 2567 [2021-03-10 21:23:57,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-03-10 21:23:57,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2417. [2021-03-10 21:23:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9536423841059603) internal successors, (7136), 2416 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7136 transitions. [2021-03-10 21:23:57,167 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7136 transitions. Word has length 20 [2021-03-10 21:23:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:57,167 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7136 transitions. [2021-03-10 21:23:57,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:23:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7136 transitions. [2021-03-10 21:23:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:57,168 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:57,169 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:57,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:57,369 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:57,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:57,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1015901271, now seen corresponding path program 113 times [2021-03-10 21:23:57,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:57,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271984819] [2021-03-10 21:23:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:57,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271984819] [2021-03-10 21:23:57,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456364821] [2021-03-10 21:23:57,425 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 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 21:23:57,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:23:57,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:57,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:23:57,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:57,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:57,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:23:57,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604670756] [2021-03-10 21:23:57,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:23:57,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:57,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:23:57,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:57,480 INFO L87 Difference]: Start difference. First operand 2417 states and 7136 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 21:23:57,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:57,608 INFO L93 Difference]: Finished difference Result 2577 states and 7366 transitions. [2021-03-10 21:23:57,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:23:57,608 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 20 [2021-03-10 21:23:57,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:57,610 INFO L225 Difference]: With dead ends: 2577 [2021-03-10 21:23:57,610 INFO L226 Difference]: Without dead ends: 2571 [2021-03-10 21:23:57,610 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-03-10 21:23:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2418. [2021-03-10 21:23:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.945800579230451) internal successors, (7120), 2417 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7120 transitions. [2021-03-10 21:23:57,633 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7120 transitions. Word has length 20 [2021-03-10 21:23:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:57,633 INFO L480 AbstractCegarLoop]: Abstraction has 2418 states and 7120 transitions. [2021-03-10 21:23:57,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 21:23:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7120 transitions. [2021-03-10 21:23:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:57,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:57,635 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:57,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:57,844 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:57,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:57,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1458800411, now seen corresponding path program 114 times [2021-03-10 21:23:57,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:57,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91772872] [2021-03-10 21:23:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:57,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91772872] [2021-03-10 21:23:57,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651254255] [2021-03-10 21:23:57,903 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 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 21:23:57,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:57,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:57,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:57,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:57,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:57,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-03-10 21:23:57,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659170954] [2021-03-10 21:23:57,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:23:57,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:57,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:23:57,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:57,974 INFO L87 Difference]: Start difference. First operand 2418 states and 7120 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:23:58,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:58,110 INFO L93 Difference]: Finished difference Result 2689 states and 7651 transitions. [2021-03-10 21:23:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:23:58,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 20 [2021-03-10 21:23:58,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:58,113 INFO L225 Difference]: With dead ends: 2689 [2021-03-10 21:23:58,113 INFO L226 Difference]: Without dead ends: 2681 [2021-03-10 21:23:58,113 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:23:58,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-03-10 21:23:58,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2420. [2021-03-10 21:23:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 2.9450186027284) internal successors, (7124), 2419 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 7124 transitions. [2021-03-10 21:23:58,136 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 7124 transitions. Word has length 20 [2021-03-10 21:23:58,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:58,136 INFO L480 AbstractCegarLoop]: Abstraction has 2420 states and 7124 transitions. [2021-03-10 21:23:58,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:23:58,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 7124 transitions. [2021-03-10 21:23:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:58,138 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:58,138 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:58,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:58,351 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:58,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:58,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1991195433, now seen corresponding path program 115 times [2021-03-10 21:23:58,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:58,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258874451] [2021-03-10 21:23:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:58,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258874451] [2021-03-10 21:23:58,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670568585] [2021-03-10 21:23:58,414 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 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 21:23:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:58,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:58,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:58,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:58,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-03-10 21:23:58,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012246712] [2021-03-10 21:23:58,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:23:58,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:58,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:23:58,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:58,479 INFO L87 Difference]: Start difference. First operand 2420 states and 7124 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:23:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:58,604 INFO L93 Difference]: Finished difference Result 2675 states and 7629 transitions. [2021-03-10 21:23:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:23:58,604 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 20 [2021-03-10 21:23:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:58,606 INFO L225 Difference]: With dead ends: 2675 [2021-03-10 21:23:58,606 INFO L226 Difference]: Without dead ends: 2660 [2021-03-10 21:23:58,606 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:23:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-03-10 21:23:58,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2425. [2021-03-10 21:23:58,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.942656765676568) internal successors, (7133), 2424 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7133 transitions. [2021-03-10 21:23:58,628 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7133 transitions. Word has length 20 [2021-03-10 21:23:58,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:58,628 INFO L480 AbstractCegarLoop]: Abstraction has 2425 states and 7133 transitions. [2021-03-10 21:23:58,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:23:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7133 transitions. [2021-03-10 21:23:58,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:58,630 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:58,630 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:58,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:58,831 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:58,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:58,831 INFO L82 PathProgramCache]: Analyzing trace with hash -823260751, now seen corresponding path program 116 times [2021-03-10 21:23:58,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:58,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231743309] [2021-03-10 21:23:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:58,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231743309] [2021-03-10 21:23:58,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557548252] [2021-03-10 21:23:58,879 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 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 21:23:58,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:58,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:58,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:23:58,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:58,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:58,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:23:58,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930052253] [2021-03-10 21:23:58,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:58,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:58,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:58,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:58,931 INFO L87 Difference]: Start difference. First operand 2425 states and 7133 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 21:23:59,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:59,014 INFO L93 Difference]: Finished difference Result 2669 states and 7579 transitions. [2021-03-10 21:23:59,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:59,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 20 [2021-03-10 21:23:59,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:59,016 INFO L225 Difference]: With dead ends: 2669 [2021-03-10 21:23:59,016 INFO L226 Difference]: Without dead ends: 2669 [2021-03-10 21:23:59,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2021-03-10 21:23:59,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2472. [2021-03-10 21:23:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9405099150141645) internal successors, (7266), 2471 states have internal predecessors, (7266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7266 transitions. [2021-03-10 21:23:59,040 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7266 transitions. Word has length 20 [2021-03-10 21:23:59,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:59,040 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 7266 transitions. [2021-03-10 21:23:59,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 21:23:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7266 transitions. [2021-03-10 21:23:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:59,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:59,042 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:59,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-03-10 21:23:59,243 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:59,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:59,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1875348307, now seen corresponding path program 117 times [2021-03-10 21:23:59,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:59,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531407536] [2021-03-10 21:23:59,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:59,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531407536] [2021-03-10 21:23:59,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502172494] [2021-03-10 21:23:59,310 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 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 21:23:59,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:23:59,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:59,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:23:59,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:59,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:59,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:23:59,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503327800] [2021-03-10 21:23:59,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:59,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:59,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:59,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:59,359 INFO L87 Difference]: Start difference. First operand 2472 states and 7266 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:23:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:59,458 INFO L93 Difference]: Finished difference Result 2639 states and 7604 transitions. [2021-03-10 21:23:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:59,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:23:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:59,461 INFO L225 Difference]: With dead ends: 2639 [2021-03-10 21:23:59,461 INFO L226 Difference]: Without dead ends: 2635 [2021-03-10 21:23:59,461 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-03-10 21:23:59,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2472. [2021-03-10 21:23:59,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9384864427357344) internal successors, (7261), 2471 states have internal predecessors, (7261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7261 transitions. [2021-03-10 21:23:59,492 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7261 transitions. Word has length 20 [2021-03-10 21:23:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:59,492 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 7261 transitions. [2021-03-10 21:23:59,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:23:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7261 transitions. [2021-03-10 21:23:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:59,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:59,494 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:59,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-03-10 21:23:59,694 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1238881453, now seen corresponding path program 118 times [2021-03-10 21:23:59,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:59,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243786670] [2021-03-10 21:23:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:59,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243786670] [2021-03-10 21:23:59,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793022570] [2021-03-10 21:23:59,755 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 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 21:23:59,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:59,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:59,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:23:59,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:59,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:59,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-03-10 21:23:59,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301838454] [2021-03-10 21:23:59,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:23:59,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:59,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:23:59,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:59,809 INFO L87 Difference]: Start difference. First operand 2472 states and 7261 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:23:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:59,932 INFO L93 Difference]: Finished difference Result 2718 states and 7731 transitions. [2021-03-10 21:23:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:23:59,933 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 20 [2021-03-10 21:23:59,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:59,935 INFO L225 Difference]: With dead ends: 2718 [2021-03-10 21:23:59,935 INFO L226 Difference]: Without dead ends: 2714 [2021-03-10 21:23:59,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-03-10 21:23:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2472. [2021-03-10 21:23:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9348441926345608) internal successors, (7252), 2471 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7252 transitions. [2021-03-10 21:23:59,958 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7252 transitions. Word has length 20 [2021-03-10 21:23:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:59,958 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 7252 transitions. [2021-03-10 21:23:59,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:23:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7252 transitions. [2021-03-10 21:23:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:23:59,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:59,960 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:00,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-03-10 21:24:00,161 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash 393910001, now seen corresponding path program 119 times [2021-03-10 21:24:00,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:00,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631177680] [2021-03-10 21:24:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:00,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631177680] [2021-03-10 21:24:00,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179959749] [2021-03-10 21:24:00,224 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:00,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:24:00,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:00,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:00,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:00,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:00,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-03-10 21:24:00,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374893034] [2021-03-10 21:24:00,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:00,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:00,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:00,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:00,278 INFO L87 Difference]: Start difference. First operand 2472 states and 7252 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:00,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:00,402 INFO L93 Difference]: Finished difference Result 2775 states and 7866 transitions. [2021-03-10 21:24:00,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:00,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 20 [2021-03-10 21:24:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:00,405 INFO L225 Difference]: With dead ends: 2775 [2021-03-10 21:24:00,405 INFO L226 Difference]: Without dead ends: 2760 [2021-03-10 21:24:00,405 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:24:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-03-10 21:24:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2486. [2021-03-10 21:24:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.9287726358148896) internal successors, (7278), 2485 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:00,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 7278 transitions. [2021-03-10 21:24:00,428 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 7278 transitions. Word has length 20 [2021-03-10 21:24:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:00,428 INFO L480 AbstractCegarLoop]: Abstraction has 2486 states and 7278 transitions. [2021-03-10 21:24:00,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:00,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 7278 transitions. [2021-03-10 21:24:00,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:00,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:00,430 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:00,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-03-10 21:24:00,631 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:00,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:00,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1540334603, now seen corresponding path program 120 times [2021-03-10 21:24:00,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:00,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983299475] [2021-03-10 21:24:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:00,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983299475] [2021-03-10 21:24:00,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565333074] [2021-03-10 21:24:00,673 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 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 21:24:00,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:00,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:00,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:00,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:00,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:00,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-03-10 21:24:00,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803867327] [2021-03-10 21:24:00,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:00,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:00,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:00,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:00,735 INFO L87 Difference]: Start difference. First operand 2486 states and 7278 transitions. Second operand has 13 states, 13 states have (on average 2.0) 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 21:24:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:00,805 INFO L93 Difference]: Finished difference Result 2905 states and 8228 transitions. [2021-03-10 21:24:00,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:24:00,805 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) 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 20 [2021-03-10 21:24:00,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:00,808 INFO L225 Difference]: With dead ends: 2905 [2021-03-10 21:24:00,808 INFO L226 Difference]: Without dead ends: 2905 [2021-03-10 21:24:00,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-03-10 21:24:00,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2666. [2021-03-10 21:24:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.9448405253283303) internal successors, (7848), 2665 states have internal predecessors, (7848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7848 transitions. [2021-03-10 21:24:00,832 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7848 transitions. Word has length 20 [2021-03-10 21:24:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:00,832 INFO L480 AbstractCegarLoop]: Abstraction has 2666 states and 7848 transitions. [2021-03-10 21:24:00,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) 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 21:24:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7848 transitions. [2021-03-10 21:24:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:00,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:00,834 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:01,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-03-10 21:24:01,035 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:01,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:01,035 INFO L82 PathProgramCache]: Analyzing trace with hash -889828905, now seen corresponding path program 121 times [2021-03-10 21:24:01,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:01,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123515202] [2021-03-10 21:24:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:01,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123515202] [2021-03-10 21:24:01,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302635081] [2021-03-10 21:24:01,083 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 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 21:24:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:01,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:01,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:01,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:01,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-03-10 21:24:01,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581566881] [2021-03-10 21:24:01,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:01,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:01,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:01,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:01,130 INFO L87 Difference]: Start difference. First operand 2666 states and 7848 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21:24:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:01,245 INFO L93 Difference]: Finished difference Result 2846 states and 8143 transitions. [2021-03-10 21:24:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:01,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 20 [2021-03-10 21:24:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:01,248 INFO L225 Difference]: With dead ends: 2846 [2021-03-10 21:24:01,248 INFO L226 Difference]: Without dead ends: 2845 [2021-03-10 21:24:01,248 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:24:01,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-03-10 21:24:01,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2666. [2021-03-10 21:24:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.94296435272045) internal successors, (7843), 2665 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7843 transitions. [2021-03-10 21:24:01,273 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7843 transitions. Word has length 20 [2021-03-10 21:24:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:01,273 INFO L480 AbstractCegarLoop]: Abstraction has 2666 states and 7843 transitions. [2021-03-10 21:24:01,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21:24:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7843 transitions. [2021-03-10 21:24:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:01,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:01,275 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:01,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:01,476 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:01,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:01,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1962914285, now seen corresponding path program 122 times [2021-03-10 21:24:01,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:01,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183759206] [2021-03-10 21:24:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:01,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183759206] [2021-03-10 21:24:01,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102059897] [2021-03-10 21:24:01,532 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 21:24:01,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:01,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:01,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:01,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:01,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:01,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-03-10 21:24:01,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734903283] [2021-03-10 21:24:01,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:01,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:01,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:01,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:01,584 INFO L87 Difference]: Start difference. First operand 2666 states and 7843 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:01,702 INFO L93 Difference]: Finished difference Result 2854 states and 8145 transitions. [2021-03-10 21:24:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:01,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-03-10 21:24:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:01,705 INFO L225 Difference]: With dead ends: 2854 [2021-03-10 21:24:01,705 INFO L226 Difference]: Without dead ends: 2849 [2021-03-10 21:24:01,705 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:24:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-03-10 21:24:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2687. [2021-03-10 21:24:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.9389426656738644) internal successors, (7894), 2686 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7894 transitions. [2021-03-10 21:24:01,739 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7894 transitions. Word has length 20 [2021-03-10 21:24:01,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:01,739 INFO L480 AbstractCegarLoop]: Abstraction has 2687 states and 7894 transitions. [2021-03-10 21:24:01,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:01,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7894 transitions. [2021-03-10 21:24:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:01,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:01,741 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:01,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-03-10 21:24:01,955 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:01,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:01,955 INFO L82 PathProgramCache]: Analyzing trace with hash -868822697, now seen corresponding path program 123 times [2021-03-10 21:24:01,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:01,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881856696] [2021-03-10 21:24:01,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:02,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881856696] [2021-03-10 21:24:02,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128853159] [2021-03-10 21:24:02,007 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 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 21:24:02,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:24:02,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:02,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:02,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:02,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:02,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-03-10 21:24:02,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535927920] [2021-03-10 21:24:02,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:02,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:02,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:02,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:02,059 INFO L87 Difference]: Start difference. First operand 2687 states and 7894 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:02,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:02,177 INFO L93 Difference]: Finished difference Result 3212 states and 8981 transitions. [2021-03-10 21:24:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:24:02,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 20 [2021-03-10 21:24:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:02,180 INFO L225 Difference]: With dead ends: 3212 [2021-03-10 21:24:02,180 INFO L226 Difference]: Without dead ends: 3209 [2021-03-10 21:24:02,180 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:24:02,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-03-10 21:24:02,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2687. [2021-03-10 21:24:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.937453462397617) internal successors, (7890), 2686 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:02,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7890 transitions. [2021-03-10 21:24:02,208 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7890 transitions. Word has length 20 [2021-03-10 21:24:02,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:02,208 INFO L480 AbstractCegarLoop]: Abstraction has 2687 states and 7890 transitions. [2021-03-10 21:24:02,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:02,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7890 transitions. [2021-03-10 21:24:02,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:02,210 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:02,210 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:02,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-03-10 21:24:02,411 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:02,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1311721837, now seen corresponding path program 124 times [2021-03-10 21:24:02,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:02,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35165535] [2021-03-10 21:24:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:02,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35165535] [2021-03-10 21:24:02,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448984139] [2021-03-10 21:24:02,475 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 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 21:24:02,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:02,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:02,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:02,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:02,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:02,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-03-10 21:24:02,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718791565] [2021-03-10 21:24:02,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:02,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:02,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:02,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:02,526 INFO L87 Difference]: Start difference. First operand 2687 states and 7890 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:02,639 INFO L93 Difference]: Finished difference Result 3217 states and 8981 transitions. [2021-03-10 21:24:02,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:24:02,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 20 [2021-03-10 21:24:02,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:02,642 INFO L225 Difference]: With dead ends: 3217 [2021-03-10 21:24:02,642 INFO L226 Difference]: Without dead ends: 3209 [2021-03-10 21:24:02,643 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-03-10 21:24:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2709. [2021-03-10 21:24:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9309453471196454) internal successors, (7937), 2708 states have internal predecessors, (7937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7937 transitions. [2021-03-10 21:24:02,669 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7937 transitions. Word has length 20 [2021-03-10 21:24:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:02,669 INFO L480 AbstractCegarLoop]: Abstraction has 2709 states and 7937 transitions. [2021-03-10 21:24:02,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:02,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7937 transitions. [2021-03-10 21:24:02,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:02,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:02,671 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:02,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-03-10 21:24:02,875 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:02,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:02,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2138274007, now seen corresponding path program 125 times [2021-03-10 21:24:02,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:02,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263344026] [2021-03-10 21:24:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:02,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263344026] [2021-03-10 21:24:02,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774842740] [2021-03-10 21:24:02,973 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 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 21:24:02,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:24:02,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:02,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:02,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:03,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:03,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-03-10 21:24:03,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728659438] [2021-03-10 21:24:03,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:03,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:03,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:03,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:03,030 INFO L87 Difference]: Start difference. First operand 2709 states and 7937 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:03,143 INFO L93 Difference]: Finished difference Result 3000 states and 8519 transitions. [2021-03-10 21:24:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:24:03,144 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 20 [2021-03-10 21:24:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:03,146 INFO L225 Difference]: With dead ends: 3000 [2021-03-10 21:24:03,146 INFO L226 Difference]: Without dead ends: 2995 [2021-03-10 21:24:03,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:03,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-03-10 21:24:03,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2709. [2021-03-10 21:24:03,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.930576070901034) internal successors, (7936), 2708 states have internal predecessors, (7936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:03,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7936 transitions. [2021-03-10 21:24:03,171 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7936 transitions. Word has length 20 [2021-03-10 21:24:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:03,171 INFO L480 AbstractCegarLoop]: Abstraction has 2709 states and 7936 transitions. [2021-03-10 21:24:03,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:03,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7936 transitions. [2021-03-10 21:24:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:03,173 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:03,173 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:03,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:03,375 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:03,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1713962771, now seen corresponding path program 126 times [2021-03-10 21:24:03,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:03,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392903227] [2021-03-10 21:24:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:03,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392903227] [2021-03-10 21:24:03,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541496967] [2021-03-10 21:24:03,459 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 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 21:24:03,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:03,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:03,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:03,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:03,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:03,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-03-10 21:24:03,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644247237] [2021-03-10 21:24:03,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:03,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:03,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:03,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:03,521 INFO L87 Difference]: Start difference. First operand 2709 states and 7936 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:03,621 INFO L93 Difference]: Finished difference Result 2966 states and 8462 transitions. [2021-03-10 21:24:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:24:03,621 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 20 [2021-03-10 21:24:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:03,623 INFO L225 Difference]: With dead ends: 2966 [2021-03-10 21:24:03,624 INFO L226 Difference]: Without dead ends: 2960 [2021-03-10 21:24:03,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-03-10 21:24:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2709. [2021-03-10 21:24:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9302067946824226) internal successors, (7935), 2708 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7935 transitions. [2021-03-10 21:24:03,649 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7935 transitions. Word has length 20 [2021-03-10 21:24:03,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:03,649 INFO L480 AbstractCegarLoop]: Abstraction has 2709 states and 7935 transitions. [2021-03-10 21:24:03,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:03,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7935 transitions. [2021-03-10 21:24:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:03,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:03,651 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:03,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-03-10 21:24:03,854 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:03,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1200498409, now seen corresponding path program 127 times [2021-03-10 21:24:03,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:03,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803681433] [2021-03-10 21:24:03,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:03,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803681433] [2021-03-10 21:24:03,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644284797] [2021-03-10 21:24:03,922 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 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 21:24:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:03,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:03,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:03,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:03,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:24:03,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768193049] [2021-03-10 21:24:03,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:03,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:03,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:03,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:03,985 INFO L87 Difference]: Start difference. First operand 2709 states and 7935 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:04,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:04,101 INFO L93 Difference]: Finished difference Result 2994 states and 8494 transitions. [2021-03-10 21:24:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:24:04,102 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 20 [2021-03-10 21:24:04,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:04,104 INFO L225 Difference]: With dead ends: 2994 [2021-03-10 21:24:04,104 INFO L226 Difference]: Without dead ends: 2994 [2021-03-10 21:24:04,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:24:04,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2021-03-10 21:24:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2744. [2021-03-10 21:24:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.930368209989063) internal successors, (8038), 2743 states have internal predecessors, (8038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:04,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8038 transitions. [2021-03-10 21:24:04,130 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8038 transitions. Word has length 20 [2021-03-10 21:24:04,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:04,130 INFO L480 AbstractCegarLoop]: Abstraction has 2744 states and 8038 transitions. [2021-03-10 21:24:04,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:04,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8038 transitions. [2021-03-10 21:24:04,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:04,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:04,132 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:04,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-03-10 21:24:04,332 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:04,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:04,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1877298135, now seen corresponding path program 128 times [2021-03-10 21:24:04,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:04,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673082073] [2021-03-10 21:24:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:04,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673082073] [2021-03-10 21:24:04,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351445974] [2021-03-10 21:24:04,406 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 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 21:24:04,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:04,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:04,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:04,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:04,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:04,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-03-10 21:24:04,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330767019] [2021-03-10 21:24:04,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:04,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:04,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:04,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:04,465 INFO L87 Difference]: Start difference. First operand 2744 states and 8038 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:24:04,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:04,594 INFO L93 Difference]: Finished difference Result 2954 states and 8469 transitions. [2021-03-10 21:24:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:04,594 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 20 [2021-03-10 21:24:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:04,597 INFO L225 Difference]: With dead ends: 2954 [2021-03-10 21:24:04,597 INFO L226 Difference]: Without dead ends: 2949 [2021-03-10 21:24:04,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:24:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-03-10 21:24:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2744. [2021-03-10 21:24:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.9292745169522423) internal successors, (8035), 2743 states have internal predecessors, (8035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8035 transitions. [2021-03-10 21:24:04,622 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8035 transitions. Word has length 20 [2021-03-10 21:24:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:04,622 INFO L480 AbstractCegarLoop]: Abstraction has 2744 states and 8035 transitions. [2021-03-10 21:24:04,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:24:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8035 transitions. [2021-03-10 21:24:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:04,624 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:04,624 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:04,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:04,831 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:04,831 INFO L82 PathProgramCache]: Analyzing trace with hash -132934129, now seen corresponding path program 129 times [2021-03-10 21:24:04,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:04,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901980347] [2021-03-10 21:24:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:04,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901980347] [2021-03-10 21:24:04,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001443904] [2021-03-10 21:24:04,893 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 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 21:24:04,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:24:04,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:04,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:04,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:04,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-03-10 21:24:04,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710816661] [2021-03-10 21:24:04,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:04,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:04,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:04,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:04,965 INFO L87 Difference]: Start difference. First operand 2744 states and 8035 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:24:05,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:05,095 INFO L93 Difference]: Finished difference Result 3147 states and 8824 transitions. [2021-03-10 21:24:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:05,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 20 [2021-03-10 21:24:05,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:05,098 INFO L225 Difference]: With dead ends: 3147 [2021-03-10 21:24:05,098 INFO L226 Difference]: Without dead ends: 3132 [2021-03-10 21:24:05,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:24:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-03-10 21:24:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 2748. [2021-03-10 21:24:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.9257371678194395) internal successors, (8037), 2747 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8037 transitions. [2021-03-10 21:24:05,140 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8037 transitions. Word has length 20 [2021-03-10 21:24:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:05,140 INFO L480 AbstractCegarLoop]: Abstraction has 2748 states and 8037 transitions. [2021-03-10 21:24:05,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:24:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8037 transitions. [2021-03-10 21:24:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:05,142 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:05,142 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:05,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:05,342 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:05,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:05,342 INFO L82 PathProgramCache]: Analyzing trace with hash -557245365, now seen corresponding path program 130 times [2021-03-10 21:24:05,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:05,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129335595] [2021-03-10 21:24:05,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:05,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129335595] [2021-03-10 21:24:05,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737468941] [2021-03-10 21:24:05,409 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 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 21:24:05,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:05,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:05,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:05,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:05,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:05,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-03-10 21:24:05,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515403769] [2021-03-10 21:24:05,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:05,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:05,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:05,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:05,470 INFO L87 Difference]: Start difference. First operand 2748 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:24:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:05,588 INFO L93 Difference]: Finished difference Result 3023 states and 8605 transitions. [2021-03-10 21:24:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:05,588 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 20 [2021-03-10 21:24:05,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:05,590 INFO L225 Difference]: With dead ends: 3023 [2021-03-10 21:24:05,590 INFO L226 Difference]: Without dead ends: 3017 [2021-03-10 21:24:05,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:24:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-03-10 21:24:05,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2748. [2021-03-10 21:24:05,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.925373134328358) internal successors, (8036), 2747 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8036 transitions. [2021-03-10 21:24:05,616 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8036 transitions. Word has length 20 [2021-03-10 21:24:05,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:05,616 INFO L480 AbstractCegarLoop]: Abstraction has 2748 states and 8036 transitions. [2021-03-10 21:24:05,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:24:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8036 transitions. [2021-03-10 21:24:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:05,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:05,618 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:05,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-03-10 21:24:05,818 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:05,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:05,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1275866105, now seen corresponding path program 131 times [2021-03-10 21:24:05,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:05,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465860977] [2021-03-10 21:24:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:05,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465860977] [2021-03-10 21:24:05,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937783296] [2021-03-10 21:24:05,879 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 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 21:24:05,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:24:05,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:05,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:05,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:05,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:05,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-03-10 21:24:05,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978827684] [2021-03-10 21:24:05,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:05,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:05,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:05,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:05,943 INFO L87 Difference]: Start difference. First operand 2748 states and 8036 transitions. Second operand has 16 states, 16 states have (on average 1.875) 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 21:24:06,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:06,031 INFO L93 Difference]: Finished difference Result 3263 states and 9284 transitions. [2021-03-10 21:24:06,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:24:06,032 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) 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 20 [2021-03-10 21:24:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:06,034 INFO L225 Difference]: With dead ends: 3263 [2021-03-10 21:24:06,034 INFO L226 Difference]: Without dead ends: 3263 [2021-03-10 21:24:06,034 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:24:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2021-03-10 21:24:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3010. [2021-03-10 21:24:06,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.9478231970754405) internal successors, (8870), 3009 states have internal predecessors, (8870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:06,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8870 transitions. [2021-03-10 21:24:06,063 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8870 transitions. Word has length 20 [2021-03-10 21:24:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:06,064 INFO L480 AbstractCegarLoop]: Abstraction has 3010 states and 8870 transitions. [2021-03-10 21:24:06,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) 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 21:24:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8870 transitions. [2021-03-10 21:24:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:06,077 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:06,077 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:06,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-03-10 21:24:06,277 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:06,277 INFO L82 PathProgramCache]: Analyzing trace with hash -625360407, now seen corresponding path program 132 times [2021-03-10 21:24:06,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:06,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787510864] [2021-03-10 21:24:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:06,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787510864] [2021-03-10 21:24:06,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904915236] [2021-03-10 21:24:06,344 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:06,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:24:06,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:06,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:06,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:06,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:06,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-03-10 21:24:06,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603998403] [2021-03-10 21:24:06,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:06,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:06,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:06,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:06,410 INFO L87 Difference]: Start difference. First operand 3010 states and 8870 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) 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 21:24:06,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:06,531 INFO L93 Difference]: Finished difference Result 3211 states and 9205 transitions. [2021-03-10 21:24:06,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:24:06,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) 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 20 [2021-03-10 21:24:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:06,534 INFO L225 Difference]: With dead ends: 3211 [2021-03-10 21:24:06,534 INFO L226 Difference]: Without dead ends: 3210 [2021-03-10 21:24:06,534 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:24:06,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-03-10 21:24:06,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3010. [2021-03-10 21:24:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.94749086075108) internal successors, (8869), 3009 states have internal predecessors, (8869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8869 transitions. [2021-03-10 21:24:06,567 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8869 transitions. Word has length 20 [2021-03-10 21:24:06,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:06,567 INFO L480 AbstractCegarLoop]: Abstraction has 3010 states and 8869 transitions. [2021-03-10 21:24:06,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) 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 21:24:06,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8869 transitions. [2021-03-10 21:24:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:06,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:06,569 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:06,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-03-10 21:24:06,769 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:06,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:06,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1698445787, now seen corresponding path program 133 times [2021-03-10 21:24:06,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:06,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080747536] [2021-03-10 21:24:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:06,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080747536] [2021-03-10 21:24:06,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282904890] [2021-03-10 21:24:06,828 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 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 21:24:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:06,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:06,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:06,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:06,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-03-10 21:24:06,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222294523] [2021-03-10 21:24:06,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:06,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:06,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:06,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:06,887 INFO L87 Difference]: Start difference. First operand 3010 states and 8869 transitions. Second operand has 16 states, 16 states have (on average 1.75) 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 21:24:07,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:07,024 INFO L93 Difference]: Finished difference Result 3214 states and 9207 transitions. [2021-03-10 21:24:07,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:24:07,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) 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 20 [2021-03-10 21:24:07,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:07,027 INFO L225 Difference]: With dead ends: 3214 [2021-03-10 21:24:07,027 INFO L226 Difference]: Without dead ends: 3211 [2021-03-10 21:24:07,027 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:07,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-03-10 21:24:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 3017. [2021-03-10 21:24:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9462864721485413) internal successors, (8886), 3016 states have internal predecessors, (8886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8886 transitions. [2021-03-10 21:24:07,055 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8886 transitions. Word has length 20 [2021-03-10 21:24:07,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:07,055 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8886 transitions. [2021-03-10 21:24:07,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) 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 21:24:07,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8886 transitions. [2021-03-10 21:24:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:07,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:07,057 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:07,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:07,257 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash -604354199, now seen corresponding path program 134 times [2021-03-10 21:24:07,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:07,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324978980] [2021-03-10 21:24:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:07,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324978980] [2021-03-10 21:24:07,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115948666] [2021-03-10 21:24:07,322 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 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 21:24:07,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:07,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:07,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:07,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:07,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:07,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-03-10 21:24:07,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346514747] [2021-03-10 21:24:07,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:07,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:07,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:07,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:07,381 INFO L87 Difference]: Start difference. First operand 3017 states and 8886 transitions. Second operand has 16 states, 16 states have (on average 1.75) 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 21:24:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:07,507 INFO L93 Difference]: Finished difference Result 3712 states and 10403 transitions. [2021-03-10 21:24:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:24:07,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) 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 20 [2021-03-10 21:24:07,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:07,510 INFO L225 Difference]: With dead ends: 3712 [2021-03-10 21:24:07,510 INFO L226 Difference]: Without dead ends: 3709 [2021-03-10 21:24:07,510 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2021-03-10 21:24:07,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 3017. [2021-03-10 21:24:07,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9449602122015914) internal successors, (8882), 3016 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8882 transitions. [2021-03-10 21:24:07,540 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8882 transitions. Word has length 20 [2021-03-10 21:24:07,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:07,540 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8882 transitions. [2021-03-10 21:24:07,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) 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 21:24:07,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8882 transitions. [2021-03-10 21:24:07,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:07,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:07,543 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:07,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-03-10 21:24:07,743 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:07,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1047253339, now seen corresponding path program 135 times [2021-03-10 21:24:07,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:07,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768920175] [2021-03-10 21:24:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:07,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768920175] [2021-03-10 21:24:07,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644919993] [2021-03-10 21:24:07,806 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 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 21:24:07,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:24:07,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:07,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:07,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:07,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:07,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-03-10 21:24:07,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380520175] [2021-03-10 21:24:07,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:07,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:07,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:07,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:07,866 INFO L87 Difference]: Start difference. First operand 3017 states and 8882 transitions. Second operand has 16 states, 16 states have (on average 1.75) 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 21:24:07,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:07,984 INFO L93 Difference]: Finished difference Result 3583 states and 10063 transitions. [2021-03-10 21:24:07,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:07,985 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) 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 20 [2021-03-10 21:24:07,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:07,987 INFO L225 Difference]: With dead ends: 3583 [2021-03-10 21:24:07,987 INFO L226 Difference]: Without dead ends: 3579 [2021-03-10 21:24:07,988 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:07,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-03-10 21:24:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3017. [2021-03-10 21:24:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.944297082228117) internal successors, (8880), 3016 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8880 transitions. [2021-03-10 21:24:08,017 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8880 transitions. Word has length 20 [2021-03-10 21:24:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:08,017 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8880 transitions. [2021-03-10 21:24:08,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) 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 21:24:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8880 transitions. [2021-03-10 21:24:08,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:08,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:08,019 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:08,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:08,220 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:08,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:08,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1892224791, now seen corresponding path program 136 times [2021-03-10 21:24:08,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:08,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638340814] [2021-03-10 21:24:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:08,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638340814] [2021-03-10 21:24:08,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71683218] [2021-03-10 21:24:08,288 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:24:08,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:08,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:08,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:08,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:08,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:08,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-03-10 21:24:08,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025064439] [2021-03-10 21:24:08,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:24:08,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:08,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:24:08,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:24:08,362 INFO L87 Difference]: Start difference. First operand 3017 states and 8880 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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 21:24:08,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:08,502 INFO L93 Difference]: Finished difference Result 3595 states and 10071 transitions. [2021-03-10 21:24:08,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:24:08,502 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 20 [2021-03-10 21:24:08,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:08,505 INFO L225 Difference]: With dead ends: 3595 [2021-03-10 21:24:08,505 INFO L226 Difference]: Without dead ends: 3580 [2021-03-10 21:24:08,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:24:08,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-03-10 21:24:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3038. [2021-03-10 21:24:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.9400724399078038) internal successors, (8929), 3037 states have internal predecessors, (8929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:08,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8929 transitions. [2021-03-10 21:24:08,539 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8929 transitions. Word has length 20 [2021-03-10 21:24:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:08,539 INFO L480 AbstractCegarLoop]: Abstraction has 3038 states and 8929 transitions. [2021-03-10 21:24:08,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:24:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8929 transitions. [2021-03-10 21:24:08,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:08,542 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:08,542 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:08,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-03-10 21:24:08,756 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:08,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:08,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1978431269, now seen corresponding path program 137 times [2021-03-10 21:24:08,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:08,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016634104] [2021-03-10 21:24:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:08,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016634104] [2021-03-10 21:24:08,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936984262] [2021-03-10 21:24:08,826 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 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 21:24:08,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:24:08,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:08,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:08,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:08,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:08,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-03-10 21:24:08,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350599422] [2021-03-10 21:24:08,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:24:08,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:08,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:24:08,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:24:08,908 INFO L87 Difference]: Start difference. First operand 3038 states and 8929 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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 21:24:09,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:09,026 INFO L93 Difference]: Finished difference Result 3383 states and 9628 transitions. [2021-03-10 21:24:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:09,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 20 [2021-03-10 21:24:09,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:09,030 INFO L225 Difference]: With dead ends: 3383 [2021-03-10 21:24:09,030 INFO L226 Difference]: Without dead ends: 3377 [2021-03-10 21:24:09,030 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:24:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-03-10 21:24:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 3038. [2021-03-10 21:24:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939743167599605) internal successors, (8928), 3037 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8928 transitions. [2021-03-10 21:24:09,059 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8928 transitions. Word has length 20 [2021-03-10 21:24:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:09,059 INFO L480 AbstractCegarLoop]: Abstraction has 3038 states and 8928 transitions. [2021-03-10 21:24:09,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:24:09,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8928 transitions. [2021-03-10 21:24:09,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:09,061 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:09,061 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:09,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:09,262 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:09,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:09,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1709684841, now seen corresponding path program 138 times [2021-03-10 21:24:09,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:09,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794658563] [2021-03-10 21:24:09,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:09,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794658563] [2021-03-10 21:24:09,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037932115] [2021-03-10 21:24:09,335 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 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 21:24:09,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:09,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:09,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:24:09,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:09,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:09,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-03-10 21:24:09,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618120013] [2021-03-10 21:24:09,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:24:09,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:09,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:24:09,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:24:09,410 INFO L87 Difference]: Start difference. First operand 3038 states and 8928 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:24:09,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:09,540 INFO L93 Difference]: Finished difference Result 3346 states and 9565 transitions. [2021-03-10 21:24:09,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:09,540 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 20 [2021-03-10 21:24:09,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:09,543 INFO L225 Difference]: With dead ends: 3346 [2021-03-10 21:24:09,543 INFO L226 Difference]: Without dead ends: 3339 [2021-03-10 21:24:09,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:24:09,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-03-10 21:24:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3038. [2021-03-10 21:24:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939413895291406) internal successors, (8927), 3037 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:09,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8927 transitions. [2021-03-10 21:24:09,573 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8927 transitions. Word has length 20 [2021-03-10 21:24:09,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:09,573 INFO L480 AbstractCegarLoop]: Abstraction has 3038 states and 8927 transitions. [2021-03-10 21:24:09,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:24:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8927 transitions. [2021-03-10 21:24:09,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:09,576 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:09,576 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:09,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-03-10 21:24:09,776 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:09,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:09,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1876737230, now seen corresponding path program 139 times [2021-03-10 21:24:09,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:09,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429089615] [2021-03-10 21:24:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:09,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429089615] [2021-03-10 21:24:09,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3432004] [2021-03-10 21:24:09,831 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 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 21:24:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:09,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:09,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:10,166 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:24:10,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:10,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-03-10 21:24:11,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:11,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:11,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:11,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:24:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:11,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:11,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:24:11,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686525108] [2021-03-10 21:24:11,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:11,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:11,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:11,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:11,673 INFO L87 Difference]: Start difference. First operand 3038 states and 8927 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:11,867 INFO L93 Difference]: Finished difference Result 3126 states and 9098 transitions. [2021-03-10 21:24:11,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:11,868 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:11,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:11,870 INFO L225 Difference]: With dead ends: 3126 [2021-03-10 21:24:11,870 INFO L226 Difference]: Without dead ends: 3123 [2021-03-10 21:24:11,871 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:11,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-03-10 21:24:11,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3077. [2021-03-10 21:24:11,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 2.935305591677503) internal successors, (9029), 3076 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 9029 transitions. [2021-03-10 21:24:11,900 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 9029 transitions. Word has length 21 [2021-03-10 21:24:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:11,900 INFO L480 AbstractCegarLoop]: Abstraction has 3077 states and 9029 transitions. [2021-03-10 21:24:11,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 9029 transitions. [2021-03-10 21:24:11,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:11,902 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:11,902 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:12,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:12,103 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:12,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:12,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1748440654, now seen corresponding path program 140 times [2021-03-10 21:24:12,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:12,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264800515] [2021-03-10 21:24:12,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:12,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264800515] [2021-03-10 21:24:12,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850889858] [2021-03-10 21:24:12,157 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 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 21:24:12,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:12,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:12,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:12,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:12,496 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:24:12,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:12,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-03-10 21:24:14,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:14,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:14,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:14,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:24:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:14,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:14,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:24:14,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103143710] [2021-03-10 21:24:14,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:14,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:14,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:14,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:14,194 INFO L87 Difference]: Start difference. First operand 3077 states and 9029 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:14,393 INFO L93 Difference]: Finished difference Result 3204 states and 9307 transitions. [2021-03-10 21:24:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:14,393 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:14,396 INFO L225 Difference]: With dead ends: 3204 [2021-03-10 21:24:14,396 INFO L226 Difference]: Without dead ends: 3200 [2021-03-10 21:24:14,396 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2021-03-10 21:24:14,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 3145. [2021-03-10 21:24:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3144 states have (on average 2.931933842239186) internal successors, (9218), 3144 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 9218 transitions. [2021-03-10 21:24:14,426 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 9218 transitions. Word has length 21 [2021-03-10 21:24:14,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:14,426 INFO L480 AbstractCegarLoop]: Abstraction has 3145 states and 9218 transitions. [2021-03-10 21:24:14,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 9218 transitions. [2021-03-10 21:24:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:14,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:14,429 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:14,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1071 [2021-03-10 21:24:14,643 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:14,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1114512810, now seen corresponding path program 141 times [2021-03-10 21:24:14,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:14,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711703698] [2021-03-10 21:24:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:14,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711703698] [2021-03-10 21:24:14,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530134409] [2021-03-10 21:24:14,698 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 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 21:24:14,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:24:14,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:14,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:15,021 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:24:15,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:15,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-03-10 21:24:17,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:17,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:17,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:17,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:24:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:17,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:17,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:24:17,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387413099] [2021-03-10 21:24:17,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:17,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:17,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:17,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:17,605 INFO L87 Difference]: Start difference. First operand 3145 states and 9218 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:17,817 INFO L93 Difference]: Finished difference Result 3276 states and 9505 transitions. [2021-03-10 21:24:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:17,818 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:17,820 INFO L225 Difference]: With dead ends: 3276 [2021-03-10 21:24:17,820 INFO L226 Difference]: Without dead ends: 3272 [2021-03-10 21:24:17,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-03-10 21:24:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3208. [2021-03-10 21:24:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 2.9307764265668848) internal successors, (9399), 3207 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 9399 transitions. [2021-03-10 21:24:17,858 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 9399 transitions. Word has length 21 [2021-03-10 21:24:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:17,858 INFO L480 AbstractCegarLoop]: Abstraction has 3208 states and 9399 transitions. [2021-03-10 21:24:17,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 9399 transitions. [2021-03-10 21:24:17,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:17,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:17,860 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:18,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1597 [2021-03-10 21:24:18,062 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:18,063 INFO L82 PathProgramCache]: Analyzing trace with hash -328243022, now seen corresponding path program 142 times [2021-03-10 21:24:18,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:18,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261627126] [2021-03-10 21:24:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:18,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261627126] [2021-03-10 21:24:18,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060555174] [2021-03-10 21:24:18,121 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 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 21:24:18,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:18,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:18,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:18,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:18,445 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:24:18,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:18,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-03-10 21:24:20,577 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1560 DAG size of output: 907 [2021-03-10 21:24:20,728 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1612 DAG size of output: 928 [2021-03-10 21:24:20,840 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1612 DAG size of output: 928 [2021-03-10 21:24:20,955 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1621 DAG size of output: 937 [2021-03-10 21:24:21,127 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 1033 [2021-03-10 21:24:22,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:22,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:22,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:22,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:24:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:22,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:22,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:24:22,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012160611] [2021-03-10 21:24:22,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:22,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:22,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:22,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:22,289 INFO L87 Difference]: Start difference. First operand 3208 states and 9399 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:22,453 INFO L93 Difference]: Finished difference Result 3340 states and 9684 transitions. [2021-03-10 21:24:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:22,454 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:22,456 INFO L225 Difference]: With dead ends: 3340 [2021-03-10 21:24:22,456 INFO L226 Difference]: Without dead ends: 3336 [2021-03-10 21:24:22,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-03-10 21:24:22,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3260. [2021-03-10 21:24:22,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.933722000613685) internal successors, (9561), 3259 states have internal predecessors, (9561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 9561 transitions. [2021-03-10 21:24:22,487 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 9561 transitions. Word has length 21 [2021-03-10 21:24:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:22,487 INFO L480 AbstractCegarLoop]: Abstraction has 3260 states and 9561 transitions. [2021-03-10 21:24:22,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 9561 transitions. [2021-03-10 21:24:22,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:22,489 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:22,489 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:22,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2575 [2021-03-10 21:24:22,690 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:22,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:22,690 INFO L82 PathProgramCache]: Analyzing trace with hash -2104000854, now seen corresponding path program 143 times [2021-03-10 21:24:22,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:22,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841549167] [2021-03-10 21:24:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:22,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841549167] [2021-03-10 21:24:22,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071741451] [2021-03-10 21:24:22,745 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 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 21:24:22,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:24:22,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:22,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:22,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:23,067 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:24:23,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:23,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-03-10 21:24:25,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:25,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:25,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:25,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:24:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:25,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:25,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:24:25,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617114107] [2021-03-10 21:24:25,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:25,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:25,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:25,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:25,117 INFO L87 Difference]: Start difference. First operand 3260 states and 9561 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:25,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:25,308 INFO L93 Difference]: Finished difference Result 3397 states and 9873 transitions. [2021-03-10 21:24:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:25,309 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:25,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:25,312 INFO L225 Difference]: With dead ends: 3397 [2021-03-10 21:24:25,312 INFO L226 Difference]: Without dead ends: 3392 [2021-03-10 21:24:25,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-03-10 21:24:25,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3328. [2021-03-10 21:24:25,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 2.935076645626691) internal successors, (9765), 3327 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 9765 transitions. [2021-03-10 21:24:25,344 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 9765 transitions. Word has length 21 [2021-03-10 21:24:25,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:25,344 INFO L480 AbstractCegarLoop]: Abstraction has 3328 states and 9765 transitions. [2021-03-10 21:24:25,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:25,344 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 9765 transitions. [2021-03-10 21:24:25,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:25,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:25,347 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:25,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3503 [2021-03-10 21:24:25,551 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:25,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:25,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1317918798, now seen corresponding path program 144 times [2021-03-10 21:24:25,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:25,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335882039] [2021-03-10 21:24:25,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:25,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335882039] [2021-03-10 21:24:25,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709514770] [2021-03-10 21:24:25,605 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 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 21:24:25,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:25,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:25,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:25,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:25,952 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:24:25,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:25,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-03-10 21:24:26,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:26,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:26,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:26,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:24:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:26,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:26,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:24:26,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495830275] [2021-03-10 21:24:26,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:26,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:26,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:26,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:26,890 INFO L87 Difference]: Start difference. First operand 3328 states and 9765 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:27,123 INFO L93 Difference]: Finished difference Result 3484 states and 10127 transitions. [2021-03-10 21:24:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:27,123 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:27,126 INFO L225 Difference]: With dead ends: 3484 [2021-03-10 21:24:27,126 INFO L226 Difference]: Without dead ends: 3480 [2021-03-10 21:24:27,126 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-03-10 21:24:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3406. [2021-03-10 21:24:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 2.9392070484581496) internal successors, (10008), 3405 states have internal predecessors, (10008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 10008 transitions. [2021-03-10 21:24:27,158 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 10008 transitions. Word has length 21 [2021-03-10 21:24:27,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:27,158 INFO L480 AbstractCegarLoop]: Abstraction has 3406 states and 10008 transitions. [2021-03-10 21:24:27,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:27,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 10008 transitions. [2021-03-10 21:24:27,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:27,161 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:27,161 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:27,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4061,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:27,361 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1575788458, now seen corresponding path program 145 times [2021-03-10 21:24:27,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:27,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280520701] [2021-03-10 21:24:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:27,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280520701] [2021-03-10 21:24:27,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195358418] [2021-03-10 21:24:27,414 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 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 21:24:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:27,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:27,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:27,732 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:24:27,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:27,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-03-10 21:24:28,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:28,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:28,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:28,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:24:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:28,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:28,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:24:28,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700045473] [2021-03-10 21:24:28,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:28,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:28,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:28,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:28,657 INFO L87 Difference]: Start difference. First operand 3406 states and 10008 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:28,871 INFO L93 Difference]: Finished difference Result 3580 states and 10428 transitions. [2021-03-10 21:24:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:28,871 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:28,874 INFO L225 Difference]: With dead ends: 3580 [2021-03-10 21:24:28,874 INFO L226 Difference]: Without dead ends: 3576 [2021-03-10 21:24:28,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:28,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2021-03-10 21:24:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3502. [2021-03-10 21:24:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3501 states have (on average 2.9460154241645244) internal successors, (10314), 3501 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:28,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 10314 transitions. [2021-03-10 21:24:28,913 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 10314 transitions. Word has length 21 [2021-03-10 21:24:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:28,913 INFO L480 AbstractCegarLoop]: Abstraction has 3502 states and 10314 transitions. [2021-03-10 21:24:28,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 10314 transitions. [2021-03-10 21:24:28,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:28,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:28,916 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:29,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4386 [2021-03-10 21:24:29,116 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:29,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1086400178, now seen corresponding path program 146 times [2021-03-10 21:24:29,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:29,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195232872] [2021-03-10 21:24:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:29,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195232872] [2021-03-10 21:24:29,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054651579] [2021-03-10 21:24:29,171 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 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 21:24:29,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:29,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:29,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:29,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:29,503 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:24:29,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:29,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-03-10 21:24:30,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:30,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:30,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:30,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:24:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:30,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:30,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:24:30,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031920865] [2021-03-10 21:24:30,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:30,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:30,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:30,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:30,650 INFO L87 Difference]: Start difference. First operand 3502 states and 10314 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:30,931 INFO L93 Difference]: Finished difference Result 3937 states and 11542 transitions. [2021-03-10 21:24:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:30,934 INFO L225 Difference]: With dead ends: 3937 [2021-03-10 21:24:30,934 INFO L226 Difference]: Without dead ends: 3934 [2021-03-10 21:24:30,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:30,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2021-03-10 21:24:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3870. [2021-03-10 21:24:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 2.9581287154303437) internal successors, (11445), 3869 states have internal predecessors, (11445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 11445 transitions. [2021-03-10 21:24:30,971 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 11445 transitions. Word has length 21 [2021-03-10 21:24:30,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:30,971 INFO L480 AbstractCegarLoop]: Abstraction has 3870 states and 11445 transitions. [2021-03-10 21:24:30,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:30,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 11445 transitions. [2021-03-10 21:24:30,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:30,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:30,974 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:31,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4797,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:31,175 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:31,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1199734614, now seen corresponding path program 147 times [2021-03-10 21:24:31,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:31,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160319806] [2021-03-10 21:24:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:31,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160319806] [2021-03-10 21:24:31,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182889757] [2021-03-10 21:24:31,240 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 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 21:24:31,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:24:31,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:31,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:31,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:31,573 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:24:31,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:31,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-03-10 21:24:35,643 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 2305 DAG size of output: 1697 [2021-03-10 21:24:35,842 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 2314 DAG size of output: 1681 [2021-03-10 21:24:36,071 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 2482 DAG size of output: 1836 [2021-03-10 21:24:36,288 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 2499 DAG size of output: 1849 [2021-03-10 21:24:36,524 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 2591 DAG size of output: 1909 [2021-03-10 21:24:36,781 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 2591 DAG size of output: 1909 [2021-03-10 21:24:37,034 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 2600 DAG size of output: 1918 [2021-03-10 21:24:37,201 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1918 DAG size of output: 1874 [2021-03-10 21:24:37,494 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 1794 DAG size of output: 2603 [2021-03-10 21:24:37,659 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1766 DAG size of output: 1632 [2021-03-10 21:24:37,855 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1625 DAG size of output: 1606 [2021-03-10 21:24:38,021 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1590 DAG size of output: 1590 [2021-03-10 21:24:38,711 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1440 DAG size of output: 1970 [2021-03-10 21:24:38,876 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 1362 DAG size of output: 1601 [2021-03-10 21:24:40,607 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 2079 DAG size of output: 1036 [2021-03-10 21:24:40,923 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 3238 DAG size of output: 1088 [2021-03-10 21:24:42,306 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 4072 DAG size of output: 1488 [2021-03-10 21:24:42,491 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 4072 DAG size of output: 1488 [2021-03-10 21:24:42,711 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 4076 DAG size of output: 1492 [2021-03-10 21:24:42,864 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1494 DAG size of output: 1390 [2021-03-10 21:24:43,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:43,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:43,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:43,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:24:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:43,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:43,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:24:43,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116680200] [2021-03-10 21:24:43,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:43,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:43,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:43,579 INFO L87 Difference]: Start difference. First operand 3870 states and 11445 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:43,793 INFO L93 Difference]: Finished difference Result 4316 states and 12694 transitions. [2021-03-10 21:24:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:43,793 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:43,797 INFO L225 Difference]: With dead ends: 4316 [2021-03-10 21:24:43,797 INFO L226 Difference]: Without dead ends: 4313 [2021-03-10 21:24:43,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:43,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2021-03-10 21:24:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 4248. [2021-03-10 21:24:43,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4247 states have (on average 2.9684483164586766) internal successors, (12607), 4247 states have internal predecessors, (12607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 12607 transitions. [2021-03-10 21:24:43,839 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 12607 transitions. Word has length 21 [2021-03-10 21:24:43,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:43,839 INFO L480 AbstractCegarLoop]: Abstraction has 4248 states and 12607 transitions. [2021-03-10 21:24:43,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 12607 transitions. [2021-03-10 21:24:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:43,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:43,842 INFO L519 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:44,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5305,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:44,043 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:44,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:44,043 INFO L82 PathProgramCache]: Analyzing trace with hash 944530866, now seen corresponding path program 148 times [2021-03-10 21:24:44,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:44,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136467429] [2021-03-10 21:24:44,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:44,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136467429] [2021-03-10 21:24:44,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831109561] [2021-03-10 21:24:44,102 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 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 21:24:44,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:44,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:44,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:44,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:44,427 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-03-10 21:24:44,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:44,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-03-10 21:24:47,575 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1858 DAG size of output: 1269 [2021-03-10 21:24:49,648 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1484 DAG size of output: 1222 [2021-03-10 21:24:49,800 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1652 DAG size of output: 1381 [2021-03-10 21:24:50,129 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 3032 DAG size of output: 2343 [2021-03-10 21:24:50,437 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 3032 DAG size of output: 2343 [2021-03-10 21:24:50,758 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 3038 DAG size of output: 2349 [2021-03-10 21:24:50,924 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 2349 DAG size of output: 1855 [2021-03-10 21:24:51,114 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 1297 DAG size of output: 1672 [2021-03-10 21:24:53,204 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1891 DAG size of output: 999 [2021-03-10 21:24:53,409 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1005 DAG size of output: 1134 [2021-03-10 21:24:53,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:53,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:53,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:53,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-03-10 21:24:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:53,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:53,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-03-10 21:24:53,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018801660] [2021-03-10 21:24:53,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:53,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:53,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:53,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:53,785 INFO L87 Difference]: Start difference. First operand 4248 states and 12607 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:54,011 INFO L93 Difference]: Finished difference Result 4620 states and 13625 transitions. [2021-03-10 21:24:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:54,011 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:54,016 INFO L225 Difference]: With dead ends: 4620 [2021-03-10 21:24:54,016 INFO L226 Difference]: Without dead ends: 4617 [2021-03-10 21:24:54,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2021-03-10 21:24:54,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 4548. [2021-03-10 21:24:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 2.9762480756542775) internal successors, (13533), 4547 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 13533 transitions. [2021-03-10 21:24:54,060 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 13533 transitions. Word has length 21 [2021-03-10 21:24:54,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:54,060 INFO L480 AbstractCegarLoop]: Abstraction has 4548 states and 13533 transitions. [2021-03-10 21:24:54,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 13533 transitions. [2021-03-10 21:24:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:54,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:54,064 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:54,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8218,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:54,264 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:54,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:54,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1973759689, now seen corresponding path program 149 times [2021-03-10 21:24:54,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:54,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143215590] [2021-03-10 21:24:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:54,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143215590] [2021-03-10 21:24:54,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929084419] [2021-03-10 21:24:54,347 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 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 21:24:54,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:24:54,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:54,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:54,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:54,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:54,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:24:54,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242473094] [2021-03-10 21:24:54,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:24:54,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:54,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:24:54,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:24:54,411 INFO L87 Difference]: Start difference. First operand 4548 states and 13533 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:24:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:54,673 INFO L93 Difference]: Finished difference Result 4872 states and 14053 transitions. [2021-03-10 21:24:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:24:54,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:24:54,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:54,677 INFO L225 Difference]: With dead ends: 4872 [2021-03-10 21:24:54,677 INFO L226 Difference]: Without dead ends: 4863 [2021-03-10 21:24:54,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=423, Invalid=837, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:24:54,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-03-10 21:24:54,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 4581. [2021-03-10 21:24:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 2.9753275109170305) internal successors, (13627), 4580 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 13627 transitions. [2021-03-10 21:24:54,726 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 13627 transitions. Word has length 22 [2021-03-10 21:24:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:54,726 INFO L480 AbstractCegarLoop]: Abstraction has 4581 states and 13627 transitions. [2021-03-10 21:24:54,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:24:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 13627 transitions. [2021-03-10 21:24:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:54,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:54,729 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:54,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10446 [2021-03-10 21:24:54,930 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:54,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:54,930 INFO L82 PathProgramCache]: Analyzing trace with hash 510781845, now seen corresponding path program 150 times [2021-03-10 21:24:54,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:54,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960812925] [2021-03-10 21:24:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:54,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960812925] [2021-03-10 21:24:54,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445050875] [2021-03-10 21:24:54,991 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 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 21:24:55,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:55,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:55,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:55,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:55,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:24:55,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227608199] [2021-03-10 21:24:55,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:55,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:55,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:55,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:55,057 INFO L87 Difference]: Start difference. First operand 4581 states and 13627 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:55,126 INFO L93 Difference]: Finished difference Result 5002 states and 14452 transitions. [2021-03-10 21:24:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:24:55,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:24:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:55,131 INFO L225 Difference]: With dead ends: 5002 [2021-03-10 21:24:55,131 INFO L226 Difference]: Without dead ends: 5002 [2021-03-10 21:24:55,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2021-03-10 21:24:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 4539. [2021-03-10 21:24:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 2.9726751873071837) internal successors, (13490), 4538 states have internal predecessors, (13490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 13490 transitions. [2021-03-10 21:24:55,181 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 13490 transitions. Word has length 22 [2021-03-10 21:24:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:55,181 INFO L480 AbstractCegarLoop]: Abstraction has 4539 states and 13490 transitions. [2021-03-10 21:24:55,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 13490 transitions. [2021-03-10 21:24:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:55,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:55,184 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:55,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10447 [2021-03-10 21:24:55,384 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:55,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:55,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1655986249, now seen corresponding path program 151 times [2021-03-10 21:24:55,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:55,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464598868] [2021-03-10 21:24:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:55,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464598868] [2021-03-10 21:24:55,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15883420] [2021-03-10 21:24:55,441 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 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 21:24:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:55,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:55,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:55,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:55,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:24:55,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206021696] [2021-03-10 21:24:55,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:55,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:55,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:55,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:55,493 INFO L87 Difference]: Start difference. First operand 4539 states and 13490 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:55,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:55,633 INFO L93 Difference]: Finished difference Result 4827 states and 13939 transitions. [2021-03-10 21:24:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:24:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:55,637 INFO L225 Difference]: With dead ends: 4827 [2021-03-10 21:24:55,637 INFO L226 Difference]: Without dead ends: 4825 [2021-03-10 21:24:55,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=209, Invalid=343, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:55,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2021-03-10 21:24:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4570. [2021-03-10 21:24:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 2.9739549135478223) internal successors, (13588), 4569 states have internal predecessors, (13588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 13588 transitions. [2021-03-10 21:24:55,688 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 13588 transitions. Word has length 22 [2021-03-10 21:24:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:55,688 INFO L480 AbstractCegarLoop]: Abstraction has 4570 states and 13588 transitions. [2021-03-10 21:24:55,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 13588 transitions. [2021-03-10 21:24:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:55,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:55,692 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:55,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10448,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:55,892 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash -921231987, now seen corresponding path program 152 times [2021-03-10 21:24:55,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:55,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600037249] [2021-03-10 21:24:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:55,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600037249] [2021-03-10 21:24:55,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884472274] [2021-03-10 21:24:55,950 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 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 21:24:55,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:55,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:55,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:55,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:56,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:56,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:24:56,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530651210] [2021-03-10 21:24:56,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:56,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:56,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:56,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:56,010 INFO L87 Difference]: Start difference. First operand 4570 states and 13588 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:56,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:56,074 INFO L93 Difference]: Finished difference Result 5088 states and 14673 transitions. [2021-03-10 21:24:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:24:56,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:24:56,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:56,079 INFO L225 Difference]: With dead ends: 5088 [2021-03-10 21:24:56,079 INFO L226 Difference]: Without dead ends: 5088 [2021-03-10 21:24:56,080 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-03-10 21:24:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4572. [2021-03-10 21:24:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 2.9739663093415007) internal successors, (13594), 4571 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:56,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 13594 transitions. [2021-03-10 21:24:56,154 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 13594 transitions. Word has length 22 [2021-03-10 21:24:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:56,154 INFO L480 AbstractCegarLoop]: Abstraction has 4572 states and 13594 transitions. [2021-03-10 21:24:56,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 13594 transitions. [2021-03-10 21:24:56,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:56,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:56,158 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:56,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10449,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:56,358 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:56,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:56,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1644687975, now seen corresponding path program 153 times [2021-03-10 21:24:56,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:56,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593947685] [2021-03-10 21:24:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:56,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593947685] [2021-03-10 21:24:56,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504717722] [2021-03-10 21:24:56,422 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 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 21:24:56,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:24:56,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:56,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:56,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:56,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:56,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:24:56,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570997093] [2021-03-10 21:24:56,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:56,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:56,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:56,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:56,486 INFO L87 Difference]: Start difference. First operand 4572 states and 13594 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:56,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:56,567 INFO L93 Difference]: Finished difference Result 5431 states and 15640 transitions. [2021-03-10 21:24:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:24:56,567 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:24:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:56,572 INFO L225 Difference]: With dead ends: 5431 [2021-03-10 21:24:56,572 INFO L226 Difference]: Without dead ends: 5431 [2021-03-10 21:24:56,572 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:24:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2021-03-10 21:24:56,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 4529. [2021-03-10 21:24:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 2.9712897526501765) internal successors, (13454), 4528 states have internal predecessors, (13454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 13454 transitions. [2021-03-10 21:24:56,622 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 13454 transitions. Word has length 22 [2021-03-10 21:24:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:56,622 INFO L480 AbstractCegarLoop]: Abstraction has 4529 states and 13454 transitions. [2021-03-10 21:24:56,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 13454 transitions. [2021-03-10 21:24:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:56,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:56,625 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:56,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10450,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:56,825 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:56,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:56,826 INFO L82 PathProgramCache]: Analyzing trace with hash 213230417, now seen corresponding path program 154 times [2021-03-10 21:24:56,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:56,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767681484] [2021-03-10 21:24:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:56,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767681484] [2021-03-10 21:24:56,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162780072] [2021-03-10 21:24:56,879 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 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 21:24:56,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:56,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:56,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:56,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:56,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:56,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:24:56,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533105933] [2021-03-10 21:24:56,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:56,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:56,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:56,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:56,933 INFO L87 Difference]: Start difference. First operand 4529 states and 13454 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:57,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:57,072 INFO L93 Difference]: Finished difference Result 4816 states and 13905 transitions. [2021-03-10 21:24:57,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:57,072 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:24:57,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:57,076 INFO L225 Difference]: With dead ends: 4816 [2021-03-10 21:24:57,076 INFO L226 Difference]: Without dead ends: 4814 [2021-03-10 21:24:57,076 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=208, Invalid=344, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2021-03-10 21:24:57,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 4562. [2021-03-10 21:24:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4562 states, 4561 states have (on average 2.9723744792808593) internal successors, (13557), 4561 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4562 states to 4562 states and 13557 transitions. [2021-03-10 21:24:57,124 INFO L78 Accepts]: Start accepts. Automaton has 4562 states and 13557 transitions. Word has length 22 [2021-03-10 21:24:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:57,124 INFO L480 AbstractCegarLoop]: Abstraction has 4562 states and 13557 transitions. [2021-03-10 21:24:57,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 4562 states and 13557 transitions. [2021-03-10 21:24:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:57,127 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:57,127 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:57,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10451,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:57,328 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:57,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1930979477, now seen corresponding path program 155 times [2021-03-10 21:24:57,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:57,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407050235] [2021-03-10 21:24:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:57,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407050235] [2021-03-10 21:24:57,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002479414] [2021-03-10 21:24:57,382 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 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 21:24:57,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:24:57,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:57,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:57,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:57,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:57,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:24:57,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517326512] [2021-03-10 21:24:57,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:57,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:57,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:57,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:57,441 INFO L87 Difference]: Start difference. First operand 4562 states and 13557 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:57,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:57,504 INFO L93 Difference]: Finished difference Result 5117 states and 14760 transitions. [2021-03-10 21:24:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:24:57,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:24:57,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:57,509 INFO L225 Difference]: With dead ends: 5117 [2021-03-10 21:24:57,509 INFO L226 Difference]: Without dead ends: 5117 [2021-03-10 21:24:57,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-03-10 21:24:57,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4563. [2021-03-10 21:24:57,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.9723805348531345) internal successors, (13560), 4562 states have internal predecessors, (13560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 13560 transitions. [2021-03-10 21:24:57,558 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 13560 transitions. Word has length 22 [2021-03-10 21:24:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:57,558 INFO L480 AbstractCegarLoop]: Abstraction has 4563 states and 13560 transitions. [2021-03-10 21:24:57,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 13560 transitions. [2021-03-10 21:24:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:57,562 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:57,562 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:57,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10452 [2021-03-10 21:24:57,762 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:57,762 INFO L82 PathProgramCache]: Analyzing trace with hash 201932143, now seen corresponding path program 156 times [2021-03-10 21:24:57,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:57,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936400210] [2021-03-10 21:24:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:57,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936400210] [2021-03-10 21:24:57,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852233382] [2021-03-10 21:24:57,818 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 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 21:24:57,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:57,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:57,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:57,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:57,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:57,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:24:57,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72405352] [2021-03-10 21:24:57,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:57,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:57,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:57,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:57,888 INFO L87 Difference]: Start difference. First operand 4563 states and 13560 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:57,973 INFO L93 Difference]: Finished difference Result 5624 states and 16198 transitions. [2021-03-10 21:24:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:24:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:24:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:57,978 INFO L225 Difference]: With dead ends: 5624 [2021-03-10 21:24:57,978 INFO L226 Difference]: Without dead ends: 5624 [2021-03-10 21:24:57,978 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:24:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5624 states. [2021-03-10 21:24:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5624 to 4520. [2021-03-10 21:24:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 2.969240982518256) internal successors, (13418), 4519 states have internal predecessors, (13418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 13418 transitions. [2021-03-10 21:24:58,029 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 13418 transitions. Word has length 22 [2021-03-10 21:24:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:58,029 INFO L480 AbstractCegarLoop]: Abstraction has 4520 states and 13418 transitions. [2021-03-10 21:24:58,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 13418 transitions. [2021-03-10 21:24:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:58,033 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:58,033 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:58,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10453 [2021-03-10 21:24:58,233 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:58,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:58,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1858927659, now seen corresponding path program 157 times [2021-03-10 21:24:58,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:58,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326874774] [2021-03-10 21:24:58,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:58,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326874774] [2021-03-10 21:24:58,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048186363] [2021-03-10 21:24:58,314 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 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 21:24:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:58,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:58,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:58,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:58,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:24:58,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651929816] [2021-03-10 21:24:58,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:58,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:58,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:58,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:58,378 INFO L87 Difference]: Start difference. First operand 4520 states and 13418 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:58,489 INFO L93 Difference]: Finished difference Result 7402 states and 21575 transitions. [2021-03-10 21:24:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:58,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:24:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:58,496 INFO L225 Difference]: With dead ends: 7402 [2021-03-10 21:24:58,496 INFO L226 Difference]: Without dead ends: 7402 [2021-03-10 21:24:58,496 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:24:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7402 states. [2021-03-10 21:24:58,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7402 to 6132. [2021-03-10 21:24:58,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 2.9955961507095092) internal successors, (18366), 6131 states have internal predecessors, (18366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:58,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 18366 transitions. [2021-03-10 21:24:58,570 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 18366 transitions. Word has length 22 [2021-03-10 21:24:58,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:58,570 INFO L480 AbstractCegarLoop]: Abstraction has 6132 states and 18366 transitions. [2021-03-10 21:24:58,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 18366 transitions. [2021-03-10 21:24:58,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:58,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:58,574 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:58,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10454 [2021-03-10 21:24:58,774 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:58,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:58,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1562527415, now seen corresponding path program 158 times [2021-03-10 21:24:58,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:58,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041046236] [2021-03-10 21:24:58,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:58,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041046236] [2021-03-10 21:24:58,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519251487] [2021-03-10 21:24:58,827 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 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 21:24:58,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:58,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:58,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:58,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:58,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:58,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:24:58,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468279810] [2021-03-10 21:24:58,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:58,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:58,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:58,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:58,880 INFO L87 Difference]: Start difference. First operand 6132 states and 18366 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:59,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:59,036 INFO L93 Difference]: Finished difference Result 6467 states and 18987 transitions. [2021-03-10 21:24:59,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:59,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:24:59,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:59,042 INFO L225 Difference]: With dead ends: 6467 [2021-03-10 21:24:59,042 INFO L226 Difference]: Without dead ends: 6465 [2021-03-10 21:24:59,042 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=207, Invalid=345, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2021-03-10 21:24:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 6222. [2021-03-10 21:24:59,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.9975888120880887) internal successors, (18648), 6221 states have internal predecessors, (18648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 18648 transitions. [2021-03-10 21:24:59,112 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 18648 transitions. Word has length 22 [2021-03-10 21:24:59,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:59,112 INFO L480 AbstractCegarLoop]: Abstraction has 6222 states and 18648 transitions. [2021-03-10 21:24:59,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 18648 transitions. [2021-03-10 21:24:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:59,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:59,117 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:59,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10455,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:59,317 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash 155221645, now seen corresponding path program 159 times [2021-03-10 21:24:59,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:59,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043235339] [2021-03-10 21:24:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:59,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043235339] [2021-03-10 21:24:59,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452689160] [2021-03-10 21:24:59,374 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 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 21:24:59,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:24:59,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:59,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:59,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:59,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:59,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:24:59,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185075279] [2021-03-10 21:24:59,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:59,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:59,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:59,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:59,448 INFO L87 Difference]: Start difference. First operand 6222 states and 18648 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:59,511 INFO L93 Difference]: Finished difference Result 6454 states and 18938 transitions. [2021-03-10 21:24:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:24:59,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:24:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:59,517 INFO L225 Difference]: With dead ends: 6454 [2021-03-10 21:24:59,517 INFO L226 Difference]: Without dead ends: 6454 [2021-03-10 21:24:59,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-03-10 21:24:59,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 6210. [2021-03-10 21:24:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 2.995490417136415) internal successors, (18599), 6209 states have internal predecessors, (18599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 18599 transitions. [2021-03-10 21:24:59,589 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 18599 transitions. Word has length 22 [2021-03-10 21:24:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:59,589 INFO L480 AbstractCegarLoop]: Abstraction has 6210 states and 18599 transitions. [2021-03-10 21:24:59,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:24:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 18599 transitions. [2021-03-10 21:24:59,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:59,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:59,593 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:59,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10456 [2021-03-10 21:24:59,794 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:59,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:59,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1573825689, now seen corresponding path program 160 times [2021-03-10 21:24:59,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:59,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442417661] [2021-03-10 21:24:59,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:59,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442417661] [2021-03-10 21:24:59,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148320209] [2021-03-10 21:24:59,850 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 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 21:24:59,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:59,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:59,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:59,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:59,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:24:59,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532662447] [2021-03-10 21:24:59,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:59,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:59,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:59,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:59,909 INFO L87 Difference]: Start difference. First operand 6210 states and 18599 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:24:59,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:59,993 INFO L93 Difference]: Finished difference Result 7159 states and 20967 transitions. [2021-03-10 21:24:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:24:59,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:24:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:00,000 INFO L225 Difference]: With dead ends: 7159 [2021-03-10 21:25:00,000 INFO L226 Difference]: Without dead ends: 7159 [2021-03-10 21:25:00,000 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:25:00,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7159 states. [2021-03-10 21:25:00,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7159 to 6221. [2021-03-10 21:25:00,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 6220 states have (on average 2.995498392282958) internal successors, (18632), 6220 states have internal predecessors, (18632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 18632 transitions. [2021-03-10 21:25:00,070 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 18632 transitions. Word has length 22 [2021-03-10 21:25:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:00,070 INFO L480 AbstractCegarLoop]: Abstraction has 6221 states and 18632 transitions. [2021-03-10 21:25:00,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 18632 transitions. [2021-03-10 21:25:00,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:00,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:00,075 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:00,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10457,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:00,276 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:00,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:00,277 INFO L82 PathProgramCache]: Analyzing trace with hash 660281805, now seen corresponding path program 161 times [2021-03-10 21:25:00,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:00,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415344703] [2021-03-10 21:25:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:00,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415344703] [2021-03-10 21:25:00,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986093140] [2021-03-10 21:25:00,338 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 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 21:25:00,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:25:00,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:00,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:00,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:00,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:00,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:00,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953586028] [2021-03-10 21:25:00,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:00,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:00,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:00,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:00,396 INFO L87 Difference]: Start difference. First operand 6221 states and 18632 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:00,491 INFO L93 Difference]: Finished difference Result 10072 states and 29921 transitions. [2021-03-10 21:25:00,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:00,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:25:00,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:00,501 INFO L225 Difference]: With dead ends: 10072 [2021-03-10 21:25:00,501 INFO L226 Difference]: Without dead ends: 10072 [2021-03-10 21:25:00,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-03-10 21:25:00,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9194. [2021-03-10 21:25:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.024583922549766) internal successors, (27805), 9193 states have internal predecessors, (27805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 27805 transitions. [2021-03-10 21:25:00,616 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 27805 transitions. Word has length 22 [2021-03-10 21:25:00,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:00,616 INFO L480 AbstractCegarLoop]: Abstraction has 9194 states and 27805 transitions. [2021-03-10 21:25:00,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:00,616 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 27805 transitions. [2021-03-10 21:25:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:00,624 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:00,624 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:00,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10458 [2021-03-10 21:25:00,826 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:00,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:00,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1198137383, now seen corresponding path program 162 times [2021-03-10 21:25:00,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:00,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593214712] [2021-03-10 21:25:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:00,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593214712] [2021-03-10 21:25:00,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585943852] [2021-03-10 21:25:00,890 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 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 21:25:00,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:25:00,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:00,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:00,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:00,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:00,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:00,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526763037] [2021-03-10 21:25:00,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:00,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:00,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:00,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:00,950 INFO L87 Difference]: Start difference. First operand 9194 states and 27805 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:01,120 INFO L93 Difference]: Finished difference Result 13143 states and 39385 transitions. [2021-03-10 21:25:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:25:01,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:25:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:01,134 INFO L225 Difference]: With dead ends: 13143 [2021-03-10 21:25:01,134 INFO L226 Difference]: Without dead ends: 13143 [2021-03-10 21:25:01,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:25:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13143 states. [2021-03-10 21:25:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13143 to 11491. [2021-03-10 21:25:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11490 states have (on average 3.0464751958224543) internal successors, (35004), 11490 states have internal predecessors, (35004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 35004 transitions. [2021-03-10 21:25:01,282 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 35004 transitions. Word has length 22 [2021-03-10 21:25:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:01,282 INFO L480 AbstractCegarLoop]: Abstraction has 11491 states and 35004 transitions. [2021-03-10 21:25:01,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 35004 transitions. [2021-03-10 21:25:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:01,290 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:01,290 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:01,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10459 [2021-03-10 21:25:01,491 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:01,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:01,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1940843115, now seen corresponding path program 163 times [2021-03-10 21:25:01,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:01,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981611012] [2021-03-10 21:25:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:25:01,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981611012] [2021-03-10 21:25:01,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998284487] [2021-03-10 21:25:01,536 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 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 21:25:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:01,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:01,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:25:01,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:01,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:25:01,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083605736] [2021-03-10 21:25:01,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:25:01,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:01,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:25:01,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:01,589 INFO L87 Difference]: Start difference. First operand 11491 states and 35004 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) 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 21:25:01,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:01,730 INFO L93 Difference]: Finished difference Result 12000 states and 36264 transitions. [2021-03-10 21:25:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:01,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 22 [2021-03-10 21:25:01,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:01,744 INFO L225 Difference]: With dead ends: 12000 [2021-03-10 21:25:01,744 INFO L226 Difference]: Without dead ends: 11996 [2021-03-10 21:25:01,744 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:25:01,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-03-10 21:25:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 11808. [2021-03-10 21:25:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11808 states, 11807 states have (on average 3.0505632252053867) internal successors, (36018), 11807 states have internal predecessors, (36018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11808 states to 11808 states and 36018 transitions. [2021-03-10 21:25:01,891 INFO L78 Accepts]: Start accepts. Automaton has 11808 states and 36018 transitions. Word has length 22 [2021-03-10 21:25:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:01,891 INFO L480 AbstractCegarLoop]: Abstraction has 11808 states and 36018 transitions. [2021-03-10 21:25:01,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 21:25:01,891 INFO L276 IsEmpty]: Start isEmpty. Operand 11808 states and 36018 transitions. [2021-03-10 21:25:01,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:01,899 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:01,899 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:02,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10460,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:02,100 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:02,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:02,100 INFO L82 PathProgramCache]: Analyzing trace with hash 469575189, now seen corresponding path program 164 times [2021-03-10 21:25:02,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:02,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056619] [2021-03-10 21:25:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:02,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056619] [2021-03-10 21:25:02,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458641258] [2021-03-10 21:25:02,157 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 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 21:25:02,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:02,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:02,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:02,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:02,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:02,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:02,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204996315] [2021-03-10 21:25:02,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:02,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:02,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:02,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:02,222 INFO L87 Difference]: Start difference. First operand 11808 states and 36018 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21:25:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:02,343 INFO L93 Difference]: Finished difference Result 14397 states and 43404 transitions. [2021-03-10 21:25:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:25:02,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-03-10 21:25:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:02,361 INFO L225 Difference]: With dead ends: 14397 [2021-03-10 21:25:02,361 INFO L226 Difference]: Without dead ends: 14397 [2021-03-10 21:25:02,361 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:25:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14397 states. [2021-03-10 21:25:02,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14397 to 12614. [2021-03-10 21:25:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 3.0629509236502024) internal successors, (38633), 12613 states have internal predecessors, (38633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:02,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 38633 transitions. [2021-03-10 21:25:02,548 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 38633 transitions. Word has length 22 [2021-03-10 21:25:02,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:02,548 INFO L480 AbstractCegarLoop]: Abstraction has 12614 states and 38633 transitions. [2021-03-10 21:25:02,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21:25:02,548 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 38633 transitions. [2021-03-10 21:25:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:02,556 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:02,556 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:02,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10461,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:02,757 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash -36771077, now seen corresponding path program 165 times [2021-03-10 21:25:02,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:02,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785157529] [2021-03-10 21:25:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:02,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785157529] [2021-03-10 21:25:02,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801136973] [2021-03-10 21:25:02,831 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 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 21:25:02,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:25:02,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:02,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:02,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:02,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:02,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:02,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098530702] [2021-03-10 21:25:02,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:02,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:02,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:02,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:02,894 INFO L87 Difference]: Start difference. First operand 12614 states and 38633 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:03,023 INFO L93 Difference]: Finished difference Result 15242 states and 46024 transitions. [2021-03-10 21:25:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:25:03,023 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:25:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:03,039 INFO L225 Difference]: With dead ends: 15242 [2021-03-10 21:25:03,040 INFO L226 Difference]: Without dead ends: 15242 [2021-03-10 21:25:03,040 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:25:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15242 states. [2021-03-10 21:25:03,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15242 to 6456. [2021-03-10 21:25:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6456 states, 6455 states have (on average 3.013787761425252) internal successors, (19454), 6455 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6456 states to 6456 states and 19454 transitions. [2021-03-10 21:25:03,154 INFO L78 Accepts]: Start accepts. Automaton has 6456 states and 19454 transitions. Word has length 22 [2021-03-10 21:25:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:03,154 INFO L480 AbstractCegarLoop]: Abstraction has 6456 states and 19454 transitions. [2021-03-10 21:25:03,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:03,154 INFO L276 IsEmpty]: Start isEmpty. Operand 6456 states and 19454 transitions. [2021-03-10 21:25:03,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:03,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:03,159 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:03,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10462 [2021-03-10 21:25:03,359 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:03,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:03,359 INFO L82 PathProgramCache]: Analyzing trace with hash 501084501, now seen corresponding path program 166 times [2021-03-10 21:25:03,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:03,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564408671] [2021-03-10 21:25:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:03,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564408671] [2021-03-10 21:25:03,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438604025] [2021-03-10 21:25:03,423 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 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 21:25:03,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:03,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:03,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:03,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:03,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:03,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:03,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144679213] [2021-03-10 21:25:03,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:03,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:03,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:03,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:03,480 INFO L87 Difference]: Start difference. First operand 6456 states and 19454 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:03,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:03,630 INFO L93 Difference]: Finished difference Result 9785 states and 29004 transitions. [2021-03-10 21:25:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:25:03,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:25:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:03,639 INFO L225 Difference]: With dead ends: 9785 [2021-03-10 21:25:03,640 INFO L226 Difference]: Without dead ends: 9785 [2021-03-10 21:25:03,640 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:25:03,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9785 states. [2021-03-10 21:25:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9785 to 6500. [2021-03-10 21:25:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6500 states, 6499 states have (on average 3.014002154177566) internal successors, (19588), 6499 states have internal predecessors, (19588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 19588 transitions. [2021-03-10 21:25:03,725 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 19588 transitions. Word has length 22 [2021-03-10 21:25:03,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:03,725 INFO L480 AbstractCegarLoop]: Abstraction has 6500 states and 19588 transitions. [2021-03-10 21:25:03,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 19588 transitions. [2021-03-10 21:25:03,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:03,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:03,729 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:03,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10463,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:03,930 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:03,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:03,930 INFO L82 PathProgramCache]: Analyzing trace with hash -776445359, now seen corresponding path program 167 times [2021-03-10 21:25:03,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:03,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282964659] [2021-03-10 21:25:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:03,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282964659] [2021-03-10 21:25:03,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178669753] [2021-03-10 21:25:03,980 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 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 21:25:04,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:25:04,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:04,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:04,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:04,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:04,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:04,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279170417] [2021-03-10 21:25:04,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:04,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:04,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:04,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:04,038 INFO L87 Difference]: Start difference. First operand 6500 states and 19588 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:25:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:04,192 INFO L93 Difference]: Finished difference Result 6765 states and 19991 transitions. [2021-03-10 21:25:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:25:04,192 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:25:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:04,198 INFO L225 Difference]: With dead ends: 6765 [2021-03-10 21:25:04,199 INFO L226 Difference]: Without dead ends: 6761 [2021-03-10 21:25:04,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:25:04,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2021-03-10 21:25:04,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 6403. [2021-03-10 21:25:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6403 states, 6402 states have (on average 3.009215870040612) internal successors, (19265), 6402 states have internal predecessors, (19265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6403 states to 6403 states and 19265 transitions. [2021-03-10 21:25:04,268 INFO L78 Accepts]: Start accepts. Automaton has 6403 states and 19265 transitions. Word has length 22 [2021-03-10 21:25:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:04,268 INFO L480 AbstractCegarLoop]: Abstraction has 6403 states and 19265 transitions. [2021-03-10 21:25:04,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:25:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 6403 states and 19265 transitions. [2021-03-10 21:25:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:04,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:04,275 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:04,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10464 [2021-03-10 21:25:04,479 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:04,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:04,479 INFO L82 PathProgramCache]: Analyzing trace with hash 941303701, now seen corresponding path program 168 times [2021-03-10 21:25:04,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:04,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013397933] [2021-03-10 21:25:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:04,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013397933] [2021-03-10 21:25:04,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937270577] [2021-03-10 21:25:04,530 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 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 21:25:04,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:25:04,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:04,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:04,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:04,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:04,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:04,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050391851] [2021-03-10 21:25:04,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:04,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:04,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:04,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:04,597 INFO L87 Difference]: Start difference. First operand 6403 states and 19265 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:25:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:04,672 INFO L93 Difference]: Finished difference Result 6899 states and 20313 transitions. [2021-03-10 21:25:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:25:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:25:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:04,680 INFO L225 Difference]: With dead ends: 6899 [2021-03-10 21:25:04,680 INFO L226 Difference]: Without dead ends: 6899 [2021-03-10 21:25:04,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:04,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-03-10 21:25:04,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6402. [2021-03-10 21:25:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6402 states, 6401 states have (on average 3.0073426027183254) internal successors, (19250), 6401 states have internal predecessors, (19250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6402 states to 6402 states and 19250 transitions. [2021-03-10 21:25:04,757 INFO L78 Accepts]: Start accepts. Automaton has 6402 states and 19250 transitions. Word has length 22 [2021-03-10 21:25:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:04,757 INFO L480 AbstractCegarLoop]: Abstraction has 6402 states and 19250 transitions. [2021-03-10 21:25:04,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:25:04,757 INFO L276 IsEmpty]: Start isEmpty. Operand 6402 states and 19250 transitions. [2021-03-10 21:25:04,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:04,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:04,761 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:04,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10465 [2021-03-10 21:25:04,961 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:04,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:04,962 INFO L82 PathProgramCache]: Analyzing trace with hash -787743633, now seen corresponding path program 169 times [2021-03-10 21:25:04,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:04,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238189812] [2021-03-10 21:25:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:05,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238189812] [2021-03-10 21:25:05,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504362200] [2021-03-10 21:25:05,017 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 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 21:25:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:05,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:05,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:05,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:05,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:25:05,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845633250] [2021-03-10 21:25:05,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:05,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:05,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:05,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:05,122 INFO L87 Difference]: Start difference. First operand 6402 states and 19250 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:05,199 INFO L93 Difference]: Finished difference Result 6620 states and 19508 transitions. [2021-03-10 21:25:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:25:05,200 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:25:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:05,206 INFO L225 Difference]: With dead ends: 6620 [2021-03-10 21:25:05,206 INFO L226 Difference]: Without dead ends: 6620 [2021-03-10 21:25:05,206 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:05,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2021-03-10 21:25:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 6370. [2021-03-10 21:25:05,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 3.004396294551735) internal successors, (19135), 6369 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 19135 transitions. [2021-03-10 21:25:05,280 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 19135 transitions. Word has length 22 [2021-03-10 21:25:05,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:05,281 INFO L480 AbstractCegarLoop]: Abstraction has 6370 states and 19135 transitions. [2021-03-10 21:25:05,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 19135 transitions. [2021-03-10 21:25:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:05,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:05,285 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:05,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10466 [2021-03-10 21:25:05,485 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:05,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:05,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1446363861, now seen corresponding path program 170 times [2021-03-10 21:25:05,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:05,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689911297] [2021-03-10 21:25:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:05,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689911297] [2021-03-10 21:25:05,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572074211] [2021-03-10 21:25:05,544 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 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 21:25:05,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:05,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:05,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:05,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:05,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780118903] [2021-03-10 21:25:05,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:05,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:05,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:05,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:05,607 INFO L87 Difference]: Start difference. First operand 6370 states and 19135 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:05,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:05,714 INFO L93 Difference]: Finished difference Result 7662 states and 22542 transitions. [2021-03-10 21:25:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:25:05,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:05,722 INFO L225 Difference]: With dead ends: 7662 [2021-03-10 21:25:05,722 INFO L226 Difference]: Without dead ends: 7662 [2021-03-10 21:25:05,722 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:25:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-03-10 21:25:05,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6264. [2021-03-10 21:25:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6264 states, 6263 states have (on average 2.9996806642184257) internal successors, (18787), 6263 states have internal predecessors, (18787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 18787 transitions. [2021-03-10 21:25:05,794 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 18787 transitions. Word has length 22 [2021-03-10 21:25:05,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:05,794 INFO L480 AbstractCegarLoop]: Abstraction has 6264 states and 18787 transitions. [2021-03-10 21:25:05,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:05,794 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 18787 transitions. [2021-03-10 21:25:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:05,798 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:05,798 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:05,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10467,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:05,998 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:05,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:05,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1984219439, now seen corresponding path program 171 times [2021-03-10 21:25:05,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:05,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740598271] [2021-03-10 21:25:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:06,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740598271] [2021-03-10 21:25:06,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039788906] [2021-03-10 21:25:06,059 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 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 21:25:06,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:25:06,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:06,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:06,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:06,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:06,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:06,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106973637] [2021-03-10 21:25:06,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:06,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:06,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:06,126 INFO L87 Difference]: Start difference. First operand 6264 states and 18787 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:06,252 INFO L93 Difference]: Finished difference Result 9995 states and 29712 transitions. [2021-03-10 21:25:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:25:06,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:06,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:06,262 INFO L225 Difference]: With dead ends: 9995 [2021-03-10 21:25:06,262 INFO L226 Difference]: Without dead ends: 9995 [2021-03-10 21:25:06,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9995 states. [2021-03-10 21:25:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9995 to 7256. [2021-03-10 21:25:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.0132322536181944) internal successors, (21861), 7255 states have internal predecessors, (21861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21861 transitions. [2021-03-10 21:25:06,354 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21861 transitions. Word has length 22 [2021-03-10 21:25:06,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:06,354 INFO L480 AbstractCegarLoop]: Abstraction has 7256 states and 21861 transitions. [2021-03-10 21:25:06,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:06,354 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21861 transitions. [2021-03-10 21:25:06,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:06,358 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:06,358 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:06,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10468 [2021-03-10 21:25:06,571 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:06,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:06,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1477873173, now seen corresponding path program 172 times [2021-03-10 21:25:06,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:06,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555681538] [2021-03-10 21:25:06,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:06,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555681538] [2021-03-10 21:25:06,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025382352] [2021-03-10 21:25:06,635 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 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 21:25:06,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:06,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:06,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:06,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:06,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:06,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:06,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646534589] [2021-03-10 21:25:06,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:06,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:06,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:06,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:06,698 INFO L87 Difference]: Start difference. First operand 7256 states and 21861 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:06,897 INFO L93 Difference]: Finished difference Result 11660 states and 34640 transitions. [2021-03-10 21:25:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:25:06,898 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:06,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:06,909 INFO L225 Difference]: With dead ends: 11660 [2021-03-10 21:25:06,909 INFO L226 Difference]: Without dead ends: 11660 [2021-03-10 21:25:06,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:25:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11660 states. [2021-03-10 21:25:07,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11660 to 9258. [2021-03-10 21:25:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9258 states, 9257 states have (on average 3.0371610673004215) internal successors, (28115), 9257 states have internal predecessors, (28115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9258 states to 9258 states and 28115 transitions. [2021-03-10 21:25:07,031 INFO L78 Accepts]: Start accepts. Automaton has 9258 states and 28115 transitions. Word has length 22 [2021-03-10 21:25:07,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:07,031 INFO L480 AbstractCegarLoop]: Abstraction has 9258 states and 28115 transitions. [2021-03-10 21:25:07,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:07,031 INFO L276 IsEmpty]: Start isEmpty. Operand 9258 states and 28115 transitions. [2021-03-10 21:25:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:07,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:07,038 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:07,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10469,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:07,238 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:07,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:07,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2074645977, now seen corresponding path program 173 times [2021-03-10 21:25:07,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:07,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186546878] [2021-03-10 21:25:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:25:07,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186546878] [2021-03-10 21:25:07,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251454434] [2021-03-10 21:25:07,280 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 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 21:25:07,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:25:07,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:07,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:07,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:25:07,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:07,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:25:07,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721390120] [2021-03-10 21:25:07,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:25:07,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:07,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:25:07,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:07,340 INFO L87 Difference]: Start difference. First operand 9258 states and 28115 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) 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 21:25:07,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:07,493 INFO L93 Difference]: Finished difference Result 9612 states and 28912 transitions. [2021-03-10 21:25:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:07,493 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 22 [2021-03-10 21:25:07,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:07,503 INFO L225 Difference]: With dead ends: 9612 [2021-03-10 21:25:07,503 INFO L226 Difference]: Without dead ends: 9608 [2021-03-10 21:25:07,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:25:07,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2021-03-10 21:25:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 9445. [2021-03-10 21:25:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9445 states, 9444 states have (on average 3.039919525624735) internal successors, (28709), 9444 states have internal predecessors, (28709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9445 states to 9445 states and 28709 transitions. [2021-03-10 21:25:07,609 INFO L78 Accepts]: Start accepts. Automaton has 9445 states and 28709 transitions. Word has length 22 [2021-03-10 21:25:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:07,609 INFO L480 AbstractCegarLoop]: Abstraction has 9445 states and 28709 transitions. [2021-03-10 21:25:07,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 21:25:07,610 INFO L276 IsEmpty]: Start isEmpty. Operand 9445 states and 28709 transitions. [2021-03-10 21:25:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:07,616 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:07,616 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:07,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10470,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:07,817 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:07,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:07,817 INFO L82 PathProgramCache]: Analyzing trace with hash 367281639, now seen corresponding path program 174 times [2021-03-10 21:25:07,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:07,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333396654] [2021-03-10 21:25:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:07,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333396654] [2021-03-10 21:25:07,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770642073] [2021-03-10 21:25:07,875 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 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 21:25:07,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:25:07,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:07,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:07,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:07,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:07,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:07,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725410374] [2021-03-10 21:25:07,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:07,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:07,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:07,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:07,938 INFO L87 Difference]: Start difference. First operand 9445 states and 28709 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:08,093 INFO L93 Difference]: Finished difference Result 12460 states and 37247 transitions. [2021-03-10 21:25:08,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:25:08,094 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:25:08,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:08,106 INFO L225 Difference]: With dead ends: 12460 [2021-03-10 21:25:08,107 INFO L226 Difference]: Without dead ends: 12460 [2021-03-10 21:25:08,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:25:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12460 states. [2021-03-10 21:25:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12460 to 9999. [2021-03-10 21:25:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9999 states, 9998 states have (on average 3.049109821964393) internal successors, (30485), 9998 states have internal predecessors, (30485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:08,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9999 states to 9999 states and 30485 transitions. [2021-03-10 21:25:08,236 INFO L78 Accepts]: Start accepts. Automaton has 9999 states and 30485 transitions. Word has length 22 [2021-03-10 21:25:08,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:08,236 INFO L480 AbstractCegarLoop]: Abstraction has 9999 states and 30485 transitions. [2021-03-10 21:25:08,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:08,237 INFO L276 IsEmpty]: Start isEmpty. Operand 9999 states and 30485 transitions. [2021-03-10 21:25:08,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:08,243 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:08,243 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:08,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10471 [2021-03-10 21:25:08,444 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:08,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:08,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1850416577, now seen corresponding path program 175 times [2021-03-10 21:25:08,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:08,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359041952] [2021-03-10 21:25:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:08,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359041952] [2021-03-10 21:25:08,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129796146] [2021-03-10 21:25:08,517 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:25:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:08,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:08,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:08,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:08,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:08,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333945416] [2021-03-10 21:25:08,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:08,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:08,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:08,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:08,587 INFO L87 Difference]: Start difference. First operand 9999 states and 30485 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:08,725 INFO L93 Difference]: Finished difference Result 12909 states and 38690 transitions. [2021-03-10 21:25:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:25:08,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:08,741 INFO L225 Difference]: With dead ends: 12909 [2021-03-10 21:25:08,741 INFO L226 Difference]: Without dead ends: 12909 [2021-03-10 21:25:08,741 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:25:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12909 states. [2021-03-10 21:25:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12909 to 6060. [2021-03-10 21:25:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 3.0120481927710845) internal successors, (18250), 6059 states have internal predecessors, (18250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 18250 transitions. [2021-03-10 21:25:08,852 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 18250 transitions. Word has length 22 [2021-03-10 21:25:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:08,852 INFO L480 AbstractCegarLoop]: Abstraction has 6060 states and 18250 transitions. [2021-03-10 21:25:08,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 18250 transitions. [2021-03-10 21:25:08,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:08,856 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:08,856 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:09,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10472,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:09,071 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:09,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1344070311, now seen corresponding path program 176 times [2021-03-10 21:25:09,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:09,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528647232] [2021-03-10 21:25:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:09,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528647232] [2021-03-10 21:25:09,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732808575] [2021-03-10 21:25:09,137 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 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 21:25:09,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:09,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:09,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:09,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:09,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:09,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:09,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66869965] [2021-03-10 21:25:09,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:09,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:09,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:09,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:09,206 INFO L87 Difference]: Start difference. First operand 6060 states and 18250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:09,419 INFO L93 Difference]: Finished difference Result 9798 states and 28894 transitions. [2021-03-10 21:25:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:25:09,420 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:09,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:09,428 INFO L225 Difference]: With dead ends: 9798 [2021-03-10 21:25:09,428 INFO L226 Difference]: Without dead ends: 9798 [2021-03-10 21:25:09,428 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:25:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2021-03-10 21:25:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 5868. [2021-03-10 21:25:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 3.0093744673598093) internal successors, (17656), 5867 states have internal predecessors, (17656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:09,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 17656 transitions. [2021-03-10 21:25:09,508 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 17656 transitions. Word has length 22 [2021-03-10 21:25:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:09,508 INFO L480 AbstractCegarLoop]: Abstraction has 5868 states and 17656 transitions. [2021-03-10 21:25:09,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:09,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 17656 transitions. [2021-03-10 21:25:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:09,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:09,512 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:09,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10473 [2021-03-10 21:25:09,712 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:09,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2117261897, now seen corresponding path program 177 times [2021-03-10 21:25:09,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:09,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315167480] [2021-03-10 21:25:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:09,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315167480] [2021-03-10 21:25:09,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054743984] [2021-03-10 21:25:09,762 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 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 21:25:09,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:25:09,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:09,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:09,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:09,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:09,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:09,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422912589] [2021-03-10 21:25:09,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:09,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:09,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:09,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:09,819 INFO L87 Difference]: Start difference. First operand 5868 states and 17656 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:25:09,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:09,963 INFO L93 Difference]: Finished difference Result 6116 states and 18033 transitions. [2021-03-10 21:25:09,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:25:09,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:25:09,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:09,969 INFO L225 Difference]: With dead ends: 6116 [2021-03-10 21:25:09,969 INFO L226 Difference]: Without dead ends: 6112 [2021-03-10 21:25:09,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:25:09,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-03-10 21:25:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 5813. [2021-03-10 21:25:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5813 states, 5812 states have (on average 3.0051617343427393) internal successors, (17466), 5812 states have internal predecessors, (17466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5813 states to 5813 states and 17466 transitions. [2021-03-10 21:25:10,029 INFO L78 Accepts]: Start accepts. Automaton has 5813 states and 17466 transitions. Word has length 22 [2021-03-10 21:25:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:10,029 INFO L480 AbstractCegarLoop]: Abstraction has 5813 states and 17466 transitions. [2021-03-10 21:25:10,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:25:10,029 INFO L276 IsEmpty]: Start isEmpty. Operand 5813 states and 17466 transitions. [2021-03-10 21:25:10,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:10,033 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:10,033 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:10,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10474 [2021-03-10 21:25:10,233 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:10,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:10,233 INFO L82 PathProgramCache]: Analyzing trace with hash -459956339, now seen corresponding path program 178 times [2021-03-10 21:25:10,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:10,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851927067] [2021-03-10 21:25:10,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:10,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851927067] [2021-03-10 21:25:10,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068059494] [2021-03-10 21:25:10,283 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 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 21:25:10,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:10,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:10,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:10,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:10,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:10,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:10,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979213226] [2021-03-10 21:25:10,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:10,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:10,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:10,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:10,341 INFO L87 Difference]: Start difference. First operand 5813 states and 17466 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:25:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:10,421 INFO L93 Difference]: Finished difference Result 6374 states and 18724 transitions. [2021-03-10 21:25:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:10,421 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:25:10,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:10,427 INFO L225 Difference]: With dead ends: 6374 [2021-03-10 21:25:10,427 INFO L226 Difference]: Without dead ends: 6374 [2021-03-10 21:25:10,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:10,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6374 states. [2021-03-10 21:25:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6374 to 5821. [2021-03-10 21:25:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 3.004982817869416) internal successors, (17489), 5820 states have internal predecessors, (17489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17489 transitions. [2021-03-10 21:25:10,490 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17489 transitions. Word has length 22 [2021-03-10 21:25:10,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:10,490 INFO L480 AbstractCegarLoop]: Abstraction has 5821 states and 17489 transitions. [2021-03-10 21:25:10,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:25:10,490 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17489 transitions. [2021-03-10 21:25:10,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:10,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:10,494 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:10,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10475 [2021-03-10 21:25:10,694 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:10,695 INFO L82 PathProgramCache]: Analyzing trace with hash 2105963623, now seen corresponding path program 179 times [2021-03-10 21:25:10,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:10,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453296806] [2021-03-10 21:25:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:10,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453296806] [2021-03-10 21:25:10,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992275693] [2021-03-10 21:25:10,747 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 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 21:25:10,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:25:10,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:10,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:10,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:10,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:10,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:25:10,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041252384] [2021-03-10 21:25:10,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:10,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:10,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:10,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:10,820 INFO L87 Difference]: Start difference. First operand 5821 states and 17489 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:10,910 INFO L93 Difference]: Finished difference Result 6454 states and 18955 transitions. [2021-03-10 21:25:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:10,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:25:10,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:10,917 INFO L225 Difference]: With dead ends: 6454 [2021-03-10 21:25:10,917 INFO L226 Difference]: Without dead ends: 6454 [2021-03-10 21:25:10,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-03-10 21:25:10,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 5751. [2021-03-10 21:25:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5751 states, 5750 states have (on average 3.001391304347826) internal successors, (17258), 5750 states have internal predecessors, (17258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:10,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5751 states to 5751 states and 17258 transitions. [2021-03-10 21:25:10,981 INFO L78 Accepts]: Start accepts. Automaton has 5751 states and 17258 transitions. Word has length 22 [2021-03-10 21:25:10,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:10,981 INFO L480 AbstractCegarLoop]: Abstraction has 5751 states and 17258 transitions. [2021-03-10 21:25:10,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:10,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5751 states and 17258 transitions. [2021-03-10 21:25:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:10,985 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:10,985 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:11,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10476 [2021-03-10 21:25:11,186 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:11,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:11,186 INFO L82 PathProgramCache]: Analyzing trace with hash 45103821, now seen corresponding path program 180 times [2021-03-10 21:25:11,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:11,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094075280] [2021-03-10 21:25:11,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:11,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094075280] [2021-03-10 21:25:11,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515610832] [2021-03-10 21:25:11,240 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 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 21:25:11,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:25:11,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:11,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:11,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:11,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:25:11,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900004183] [2021-03-10 21:25:11,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:11,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:11,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:11,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:11,305 INFO L87 Difference]: Start difference. First operand 5751 states and 17258 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:11,396 INFO L93 Difference]: Finished difference Result 9965 states and 29813 transitions. [2021-03-10 21:25:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:25:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:25:11,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:11,407 INFO L225 Difference]: With dead ends: 9965 [2021-03-10 21:25:11,407 INFO L226 Difference]: Without dead ends: 9965 [2021-03-10 21:25:11,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:25:11,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9965 states. [2021-03-10 21:25:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9965 to 9679. [2021-03-10 21:25:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9679 states, 9678 states have (on average 3.0377144038024384) internal successors, (29399), 9678 states have internal predecessors, (29399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 29399 transitions. [2021-03-10 21:25:11,519 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 29399 transitions. Word has length 22 [2021-03-10 21:25:11,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:11,519 INFO L480 AbstractCegarLoop]: Abstraction has 9679 states and 29399 transitions. [2021-03-10 21:25:11,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:11,519 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 29399 transitions. [2021-03-10 21:25:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:11,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:11,524 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:11,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10477,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:11,725 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:11,725 INFO L82 PathProgramCache]: Analyzing trace with hash 582959399, now seen corresponding path program 181 times [2021-03-10 21:25:11,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:11,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771153569] [2021-03-10 21:25:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:11,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771153569] [2021-03-10 21:25:11,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056220767] [2021-03-10 21:25:11,785 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 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 21:25:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:11,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:11,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:11,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:11,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429931770] [2021-03-10 21:25:11,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:11,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:11,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:11,853 INFO L87 Difference]: Start difference. First operand 9679 states and 29399 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:11,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:11,976 INFO L93 Difference]: Finished difference Result 10632 states and 31706 transitions. [2021-03-10 21:25:11,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:25:11,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:11,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:11,987 INFO L225 Difference]: With dead ends: 10632 [2021-03-10 21:25:11,987 INFO L226 Difference]: Without dead ends: 10632 [2021-03-10 21:25:11,988 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2021-03-10 21:25:12,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 8622. [2021-03-10 21:25:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8622 states, 8621 states have (on average 3.030506901751537) internal successors, (26126), 8621 states have internal predecessors, (26126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8622 states to 8622 states and 26126 transitions. [2021-03-10 21:25:12,096 INFO L78 Accepts]: Start accepts. Automaton has 8622 states and 26126 transitions. Word has length 22 [2021-03-10 21:25:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:12,096 INFO L480 AbstractCegarLoop]: Abstraction has 8622 states and 26126 transitions. [2021-03-10 21:25:12,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 8622 states and 26126 transitions. [2021-03-10 21:25:12,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:12,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:12,101 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:12,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10478 [2021-03-10 21:25:12,302 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:12,302 INFO L82 PathProgramCache]: Analyzing trace with hash 76613133, now seen corresponding path program 182 times [2021-03-10 21:25:12,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:12,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874731621] [2021-03-10 21:25:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:12,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874731621] [2021-03-10 21:25:12,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861820626] [2021-03-10 21:25:12,365 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 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 21:25:12,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:12,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:12,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:12,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:12,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:12,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:12,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089023608] [2021-03-10 21:25:12,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:12,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:12,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:12,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:12,428 INFO L87 Difference]: Start difference. First operand 8622 states and 26126 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:12,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:12,603 INFO L93 Difference]: Finished difference Result 14571 states and 43929 transitions. [2021-03-10 21:25:12,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:25:12,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:12,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:12,621 INFO L225 Difference]: With dead ends: 14571 [2021-03-10 21:25:12,621 INFO L226 Difference]: Without dead ends: 14571 [2021-03-10 21:25:12,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:25:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14571 states. [2021-03-10 21:25:12,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14571 to 13534. [2021-03-10 21:25:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13534 states, 13533 states have (on average 3.05660237936895) internal successors, (41365), 13533 states have internal predecessors, (41365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 41365 transitions. [2021-03-10 21:25:12,797 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 41365 transitions. Word has length 22 [2021-03-10 21:25:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:12,798 INFO L480 AbstractCegarLoop]: Abstraction has 13534 states and 41365 transitions. [2021-03-10 21:25:12,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 41365 transitions. [2021-03-10 21:25:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:12,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:12,806 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:13,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10479 [2021-03-10 21:25:13,006 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:13,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1559748071, now seen corresponding path program 183 times [2021-03-10 21:25:13,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:13,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514584932] [2021-03-10 21:25:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:13,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514584932] [2021-03-10 21:25:13,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117148392] [2021-03-10 21:25:13,075 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 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 21:25:13,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:25:13,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:13,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:13,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:13,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:13,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:13,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315164211] [2021-03-10 21:25:13,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:13,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:13,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:13,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:13,151 INFO L87 Difference]: Start difference. First operand 13534 states and 41365 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:13,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:13,411 INFO L93 Difference]: Finished difference Result 19456 states and 59104 transitions. [2021-03-10 21:25:13,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:25:13,412 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:13,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:13,434 INFO L225 Difference]: With dead ends: 19456 [2021-03-10 21:25:13,434 INFO L226 Difference]: Without dead ends: 19456 [2021-03-10 21:25:13,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=411, Invalid=779, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:25:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19456 states. [2021-03-10 21:25:13,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19456 to 17545. [2021-03-10 21:25:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17545 states, 17544 states have (on average 3.0747264021887823) internal successors, (53943), 17544 states have internal predecessors, (53943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17545 states to 17545 states and 53943 transitions. [2021-03-10 21:25:13,706 INFO L78 Accepts]: Start accepts. Automaton has 17545 states and 53943 transitions. Word has length 22 [2021-03-10 21:25:13,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:13,706 INFO L480 AbstractCegarLoop]: Abstraction has 17545 states and 53943 transitions. [2021-03-10 21:25:13,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:13,707 INFO L276 IsEmpty]: Start isEmpty. Operand 17545 states and 53943 transitions. [2021-03-10 21:25:13,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:13,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:13,716 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:13,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10480,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:13,916 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:13,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:13,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1491148885, now seen corresponding path program 184 times [2021-03-10 21:25:13,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:13,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745569181] [2021-03-10 21:25:13,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:13,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745569181] [2021-03-10 21:25:13,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014397982] [2021-03-10 21:25:13,984 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 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 21:25:14,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:14,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:14,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:14,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:14,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:14,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:14,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440602520] [2021-03-10 21:25:14,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:14,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:14,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:14,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:14,041 INFO L87 Difference]: Start difference. First operand 17545 states and 53943 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:14,263 INFO L93 Difference]: Finished difference Result 24132 states and 73287 transitions. [2021-03-10 21:25:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:25:14,264 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:14,297 INFO L225 Difference]: With dead ends: 24132 [2021-03-10 21:25:14,297 INFO L226 Difference]: Without dead ends: 24132 [2021-03-10 21:25:14,298 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:25:14,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24132 states. [2021-03-10 21:25:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24132 to 13806. [2021-03-10 21:25:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13806 states, 13805 states have (on average 3.0678739587106123) internal successors, (42352), 13805 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13806 states to 13806 states and 42352 transitions. [2021-03-10 21:25:14,560 INFO L78 Accepts]: Start accepts. Automaton has 13806 states and 42352 transitions. Word has length 22 [2021-03-10 21:25:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:14,560 INFO L480 AbstractCegarLoop]: Abstraction has 13806 states and 42352 transitions. [2021-03-10 21:25:14,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 13806 states and 42352 transitions. [2021-03-10 21:25:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:14,568 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:14,568 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:14,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10481,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:14,769 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:14,769 INFO L82 PathProgramCache]: Analyzing trace with hash 223691707, now seen corresponding path program 185 times [2021-03-10 21:25:14,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:14,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264362947] [2021-03-10 21:25:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:14,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264362947] [2021-03-10 21:25:14,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568730783] [2021-03-10 21:25:14,836 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 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 21:25:14,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:25:14,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:14,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:14,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:14,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:14,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:14,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826709585] [2021-03-10 21:25:14,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:14,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:14,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:14,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:14,895 INFO L87 Difference]: Start difference. First operand 13806 states and 42352 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:15,095 INFO L93 Difference]: Finished difference Result 20948 states and 63957 transitions. [2021-03-10 21:25:15,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:25:15,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:15,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:15,124 INFO L225 Difference]: With dead ends: 20948 [2021-03-10 21:25:15,124 INFO L226 Difference]: Without dead ends: 20948 [2021-03-10 21:25:15,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:15,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20948 states. [2021-03-10 21:25:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20948 to 19052. [2021-03-10 21:25:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19052 states, 19051 states have (on average 3.0863996640596296) internal successors, (58799), 19051 states have internal predecessors, (58799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19052 states to 19052 states and 58799 transitions. [2021-03-10 21:25:15,418 INFO L78 Accepts]: Start accepts. Automaton has 19052 states and 58799 transitions. Word has length 22 [2021-03-10 21:25:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:15,418 INFO L480 AbstractCegarLoop]: Abstraction has 19052 states and 58799 transitions. [2021-03-10 21:25:15,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 19052 states and 58799 transitions. [2021-03-10 21:25:15,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:15,427 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:15,427 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:15,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10482,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:15,631 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:15,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1706826645, now seen corresponding path program 186 times [2021-03-10 21:25:15,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:15,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387102796] [2021-03-10 21:25:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:15,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387102796] [2021-03-10 21:25:15,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876584946] [2021-03-10 21:25:15,699 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 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 21:25:15,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:25:15,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:15,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:15,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:15,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:15,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:15,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777164938] [2021-03-10 21:25:15,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:15,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:15,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:15,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:15,759 INFO L87 Difference]: Start difference. First operand 19052 states and 58799 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:16,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:16,056 INFO L93 Difference]: Finished difference Result 28543 states and 87595 transitions. [2021-03-10 21:25:16,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:25:16,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:16,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:16,104 INFO L225 Difference]: With dead ends: 28543 [2021-03-10 21:25:16,105 INFO L226 Difference]: Without dead ends: 28543 [2021-03-10 21:25:16,105 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:25:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28543 states. [2021-03-10 21:25:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28543 to 26854. [2021-03-10 21:25:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26854 states, 26853 states have (on average 3.0954455740513165) internal successors, (83122), 26853 states have internal predecessors, (83122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26854 states to 26854 states and 83122 transitions. [2021-03-10 21:25:16,535 INFO L78 Accepts]: Start accepts. Automaton has 26854 states and 83122 transitions. Word has length 22 [2021-03-10 21:25:16,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:16,535 INFO L480 AbstractCegarLoop]: Abstraction has 26854 states and 83122 transitions. [2021-03-10 21:25:16,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:16,535 INFO L276 IsEmpty]: Start isEmpty. Operand 26854 states and 83122 transitions. [2021-03-10 21:25:16,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:16,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:16,545 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:16,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10483,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:16,746 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:16,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:16,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1627873617, now seen corresponding path program 187 times [2021-03-10 21:25:16,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:16,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924333577] [2021-03-10 21:25:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:16,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924333577] [2021-03-10 21:25:16,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720523328] [2021-03-10 21:25:16,797 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 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 21:25:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:16,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:16,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:16,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:16,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:16,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211451597] [2021-03-10 21:25:16,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:16,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:16,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:16,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:16,850 INFO L87 Difference]: Start difference. First operand 26854 states and 83122 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:25:17,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:17,151 INFO L93 Difference]: Finished difference Result 27245 states and 83974 transitions. [2021-03-10 21:25:17,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:25:17,152 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:25:17,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:17,190 INFO L225 Difference]: With dead ends: 27245 [2021-03-10 21:25:17,190 INFO L226 Difference]: Without dead ends: 27241 [2021-03-10 21:25:17,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:25:17,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27241 states. [2021-03-10 21:25:17,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27241 to 25289. [2021-03-10 21:25:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25289 states, 25288 states have (on average 3.0879863967099017) internal successors, (78089), 25288 states have internal predecessors, (78089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25289 states to 25289 states and 78089 transitions. [2021-03-10 21:25:17,585 INFO L78 Accepts]: Start accepts. Automaton has 25289 states and 78089 transitions. Word has length 22 [2021-03-10 21:25:17,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:17,585 INFO L480 AbstractCegarLoop]: Abstraction has 25289 states and 78089 transitions. [2021-03-10 21:25:17,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:25:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 25289 states and 78089 transitions. [2021-03-10 21:25:17,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:17,594 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:17,594 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:17,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10484,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:17,795 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:17,796 INFO L82 PathProgramCache]: Analyzing trace with hash -949344619, now seen corresponding path program 188 times [2021-03-10 21:25:17,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:17,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203650215] [2021-03-10 21:25:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:17,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203650215] [2021-03-10 21:25:17,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954552468] [2021-03-10 21:25:17,850 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 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 21:25:17,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:17,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:17,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:17,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:17,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:17,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:17,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578053705] [2021-03-10 21:25:17,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:17,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:17,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:17,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:17,906 INFO L87 Difference]: Start difference. First operand 25289 states and 78089 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:25:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:18,048 INFO L93 Difference]: Finished difference Result 27144 states and 83198 transitions. [2021-03-10 21:25:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:25:18,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:25:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:18,084 INFO L225 Difference]: With dead ends: 27144 [2021-03-10 21:25:18,084 INFO L226 Difference]: Without dead ends: 27144 [2021-03-10 21:25:18,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:25:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-03-10 21:25:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 25336. [2021-03-10 21:25:18,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25336 states, 25335 states have (on average 3.08656009473061) internal successors, (78198), 25335 states have internal predecessors, (78198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25336 states to 25336 states and 78198 transitions. [2021-03-10 21:25:18,485 INFO L78 Accepts]: Start accepts. Automaton has 25336 states and 78198 transitions. Word has length 22 [2021-03-10 21:25:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:18,485 INFO L480 AbstractCegarLoop]: Abstraction has 25336 states and 78198 transitions. [2021-03-10 21:25:18,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:25:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 25336 states and 78198 transitions. [2021-03-10 21:25:18,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:18,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:18,494 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:18,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10485 [2021-03-10 21:25:18,699 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:18,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:18,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1616575343, now seen corresponding path program 189 times [2021-03-10 21:25:18,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:18,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851919147] [2021-03-10 21:25:18,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:18,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851919147] [2021-03-10 21:25:18,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959983413] [2021-03-10 21:25:18,755 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 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 21:25:18,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:25:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:18,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:18,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:18,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:18,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:18,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554646246] [2021-03-10 21:25:18,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:18,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:18,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:18,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:18,813 INFO L87 Difference]: Start difference. First operand 25336 states and 78198 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:18,983 INFO L93 Difference]: Finished difference Result 28314 states and 86669 transitions. [2021-03-10 21:25:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:25:18,984 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:25:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:19,025 INFO L225 Difference]: With dead ends: 28314 [2021-03-10 21:25:19,025 INFO L226 Difference]: Without dead ends: 28314 [2021-03-10 21:25:19,025 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:25:19,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28314 states. [2021-03-10 21:25:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28314 to 22217. [2021-03-10 21:25:19,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 3.076026287360461) internal successors, (68337), 22216 states have internal predecessors, (68337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 68337 transitions. [2021-03-10 21:25:19,428 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 68337 transitions. Word has length 22 [2021-03-10 21:25:19,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:19,428 INFO L480 AbstractCegarLoop]: Abstraction has 22217 states and 68337 transitions. [2021-03-10 21:25:19,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:19,428 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 68337 transitions. [2021-03-10 21:25:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:19,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:19,437 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:19,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10486 [2021-03-10 21:25:19,651 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:19,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:19,651 INFO L82 PathProgramCache]: Analyzing trace with hash -444284459, now seen corresponding path program 190 times [2021-03-10 21:25:19,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:19,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005164269] [2021-03-10 21:25:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:19,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005164269] [2021-03-10 21:25:19,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80784331] [2021-03-10 21:25:19,718 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 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 21:25:19,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:19,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:19,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:19,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:19,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:19,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:19,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411661916] [2021-03-10 21:25:19,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:19,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:19,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:19,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:19,811 INFO L87 Difference]: Start difference. First operand 22217 states and 68337 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:20,086 INFO L93 Difference]: Finished difference Result 40934 states and 126275 transitions. [2021-03-10 21:25:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:20,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:25:20,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:20,143 INFO L225 Difference]: With dead ends: 40934 [2021-03-10 21:25:20,143 INFO L226 Difference]: Without dead ends: 40934 [2021-03-10 21:25:20,143 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:25:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40934 states. [2021-03-10 21:25:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40934 to 32281. [2021-03-10 21:25:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32281 states, 32280 states have (on average 3.1012391573729863) internal successors, (100108), 32280 states have internal predecessors, (100108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32281 states to 32281 states and 100108 transitions. [2021-03-10 21:25:20,709 INFO L78 Accepts]: Start accepts. Automaton has 32281 states and 100108 transitions. Word has length 22 [2021-03-10 21:25:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:20,709 INFO L480 AbstractCegarLoop]: Abstraction has 32281 states and 100108 transitions. [2021-03-10 21:25:20,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:20,709 INFO L276 IsEmpty]: Start isEmpty. Operand 32281 states and 100108 transitions. [2021-03-10 21:25:20,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:20,719 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:20,719 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:20,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10487 [2021-03-10 21:25:20,923 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:20,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:20,923 INFO L82 PathProgramCache]: Analyzing trace with hash 93571119, now seen corresponding path program 191 times [2021-03-10 21:25:20,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:20,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366389447] [2021-03-10 21:25:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:20,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366389447] [2021-03-10 21:25:20,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204153597] [2021-03-10 21:25:20,981 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 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 21:25:21,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:25:21,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:21,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:21,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:21,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:21,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:21,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186934372] [2021-03-10 21:25:21,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:21,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:21,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:21,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:21,040 INFO L87 Difference]: Start difference. First operand 32281 states and 100108 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:21,220 INFO L93 Difference]: Finished difference Result 45762 states and 141598 transitions. [2021-03-10 21:25:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:25:21,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:25:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:21,293 INFO L225 Difference]: With dead ends: 45762 [2021-03-10 21:25:21,293 INFO L226 Difference]: Without dead ends: 45762 [2021-03-10 21:25:21,293 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45762 states. [2021-03-10 21:25:21,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45762 to 45505. [2021-03-10 21:25:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45505 states, 45504 states have (on average 3.1023426511954995) internal successors, (141169), 45504 states have internal predecessors, (141169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45505 states to 45505 states and 141169 transitions. [2021-03-10 21:25:22,038 INFO L78 Accepts]: Start accepts. Automaton has 45505 states and 141169 transitions. Word has length 22 [2021-03-10 21:25:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:22,038 INFO L480 AbstractCegarLoop]: Abstraction has 45505 states and 141169 transitions. [2021-03-10 21:25:22,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 45505 states and 141169 transitions. [2021-03-10 21:25:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:22,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:22,051 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:22,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10488 [2021-03-10 21:25:22,252 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:22,252 INFO L82 PathProgramCache]: Analyzing trace with hash -412775147, now seen corresponding path program 192 times [2021-03-10 21:25:22,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:22,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354661353] [2021-03-10 21:25:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:22,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354661353] [2021-03-10 21:25:22,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732460303] [2021-03-10 21:25:22,318 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 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 21:25:22,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:25:22,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:22,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:22,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:22,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:22,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:22,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296353654] [2021-03-10 21:25:22,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:22,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:22,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:22,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:22,378 INFO L87 Difference]: Start difference. First operand 45505 states and 141169 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:22,603 INFO L93 Difference]: Finished difference Result 46432 states and 143526 transitions. [2021-03-10 21:25:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:25:22,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:22,825 INFO L225 Difference]: With dead ends: 46432 [2021-03-10 21:25:22,825 INFO L226 Difference]: Without dead ends: 46432 [2021-03-10 21:25:22,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:25:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46432 states. [2021-03-10 21:25:23,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46432 to 45128. [2021-03-10 21:25:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45128 states, 45127 states have (on average 3.1029317260176836) internal successors, (140026), 45127 states have internal predecessors, (140026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45128 states to 45128 states and 140026 transitions. [2021-03-10 21:25:23,510 INFO L78 Accepts]: Start accepts. Automaton has 45128 states and 140026 transitions. Word has length 22 [2021-03-10 21:25:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:23,510 INFO L480 AbstractCegarLoop]: Abstraction has 45128 states and 140026 transitions. [2021-03-10 21:25:23,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 45128 states and 140026 transitions. [2021-03-10 21:25:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:23,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:23,524 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:23,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10489,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:23,725 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:23,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1070359791, now seen corresponding path program 193 times [2021-03-10 21:25:23,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:23,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969234909] [2021-03-10 21:25:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:23,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969234909] [2021-03-10 21:25:23,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040100661] [2021-03-10 21:25:23,797 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 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 21:25:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:23,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:23,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:23,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:23,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:23,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528830071] [2021-03-10 21:25:23,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:23,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:23,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:23,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:23,855 INFO L87 Difference]: Start difference. First operand 45128 states and 140026 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:24,175 INFO L93 Difference]: Finished difference Result 49791 states and 153978 transitions. [2021-03-10 21:25:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:24,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:24,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:24,264 INFO L225 Difference]: With dead ends: 49791 [2021-03-10 21:25:24,264 INFO L226 Difference]: Without dead ends: 49791 [2021-03-10 21:25:24,264 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=285, Invalid=585, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:25:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49791 states. [2021-03-10 21:25:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49791 to 49280. [2021-03-10 21:25:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49280 states, 49279 states have (on average 3.102295095273849) internal successors, (152878), 49279 states have internal predecessors, (152878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49280 states to 49280 states and 152878 transitions. [2021-03-10 21:25:25,333 INFO L78 Accepts]: Start accepts. Automaton has 49280 states and 152878 transitions. Word has length 22 [2021-03-10 21:25:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:25,334 INFO L480 AbstractCegarLoop]: Abstraction has 49280 states and 152878 transitions. [2021-03-10 21:25:25,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 49280 states and 152878 transitions. [2021-03-10 21:25:25,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:25,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:25,347 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:25,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10490 [2021-03-10 21:25:25,547 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:25,548 INFO L82 PathProgramCache]: Analyzing trace with hash -197097387, now seen corresponding path program 194 times [2021-03-10 21:25:25,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:25,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577137669] [2021-03-10 21:25:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:25,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577137669] [2021-03-10 21:25:25,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016610220] [2021-03-10 21:25:25,869 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 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 21:25:25,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:25,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:25,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:25,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:25,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:25,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:25,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797416986] [2021-03-10 21:25:25,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:25,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:25,930 INFO L87 Difference]: Start difference. First operand 49280 states and 152878 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:26,400 INFO L93 Difference]: Finished difference Result 52302 states and 161626 transitions. [2021-03-10 21:25:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:25:26,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:26,495 INFO L225 Difference]: With dead ends: 52302 [2021-03-10 21:25:26,495 INFO L226 Difference]: Without dead ends: 52302 [2021-03-10 21:25:26,495 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=525, Invalid=1035, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:25:26,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52302 states. [2021-03-10 21:25:27,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52302 to 51634. [2021-03-10 21:25:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51634 states, 51633 states have (on average 3.101311176960471) internal successors, (160130), 51633 states have internal predecessors, (160130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51634 states to 51634 states and 160130 transitions. [2021-03-10 21:25:27,569 INFO L78 Accepts]: Start accepts. Automaton has 51634 states and 160130 transitions. Word has length 22 [2021-03-10 21:25:27,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:27,569 INFO L480 AbstractCegarLoop]: Abstraction has 51634 states and 160130 transitions. [2021-03-10 21:25:27,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:27,569 INFO L276 IsEmpty]: Start isEmpty. Operand 51634 states and 160130 transitions. [2021-03-10 21:25:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:27,582 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:27,582 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:27,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10491,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:27,797 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1546669833, now seen corresponding path program 195 times [2021-03-10 21:25:27,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:27,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368078891] [2021-03-10 21:25:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:27,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368078891] [2021-03-10 21:25:27,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411911565] [2021-03-10 21:25:27,855 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 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 21:25:27,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:25:27,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:27,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:27,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:25:27,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:27,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:27,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622714258] [2021-03-10 21:25:27,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:27,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:27,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:27,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:27,912 INFO L87 Difference]: Start difference. First operand 51634 states and 160130 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:25:28,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:28,304 INFO L93 Difference]: Finished difference Result 52382 states and 162119 transitions. [2021-03-10 21:25:28,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:25:28,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 22 [2021-03-10 21:25:28,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:28,390 INFO L225 Difference]: With dead ends: 52382 [2021-03-10 21:25:28,390 INFO L226 Difference]: Without dead ends: 52376 [2021-03-10 21:25:28,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52376 states. [2021-03-10 21:25:29,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52376 to 52177. [2021-03-10 21:25:29,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52177 states, 52176 states have (on average 3.102135081263416) internal successors, (161857), 52176 states have internal predecessors, (161857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52177 states to 52177 states and 161857 transitions. [2021-03-10 21:25:29,509 INFO L78 Accepts]: Start accepts. Automaton has 52177 states and 161857 transitions. Word has length 22 [2021-03-10 21:25:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:29,509 INFO L480 AbstractCegarLoop]: Abstraction has 52177 states and 161857 transitions. [2021-03-10 21:25:29,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:25:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 52177 states and 161857 transitions. [2021-03-10 21:25:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:29,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:29,545 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:29,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10492,197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:29,756 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:29,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:29,756 INFO L82 PathProgramCache]: Analyzing trace with hash 471577549, now seen corresponding path program 196 times [2021-03-10 21:25:29,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:29,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96309941] [2021-03-10 21:25:29,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:29,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96309941] [2021-03-10 21:25:29,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629319811] [2021-03-10 21:25:29,829 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 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 21:25:29,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:29,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:29,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:29,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:25:29,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:29,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:29,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685605744] [2021-03-10 21:25:29,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:29,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:29,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:29,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:29,888 INFO L87 Difference]: Start difference. First operand 52177 states and 161857 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21:25:30,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:30,326 INFO L93 Difference]: Finished difference Result 71897 states and 222309 transitions. [2021-03-10 21:25:30,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:25:30,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-03-10 21:25:30,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:30,442 INFO L225 Difference]: With dead ends: 71897 [2021-03-10 21:25:30,443 INFO L226 Difference]: Without dead ends: 71897 [2021-03-10 21:25:30,443 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71897 states. [2021-03-10 21:25:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71897 to 70150. [2021-03-10 21:25:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70150 states, 70149 states have (on average 3.098347802534605) internal successors, (217346), 70149 states have internal predecessors, (217346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:31,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70150 states to 70150 states and 217346 transitions. [2021-03-10 21:25:31,952 INFO L78 Accepts]: Start accepts. Automaton has 70150 states and 217346 transitions. Word has length 22 [2021-03-10 21:25:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:31,952 INFO L480 AbstractCegarLoop]: Abstraction has 70150 states and 217346 transitions. [2021-03-10 21:25:31,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21:25:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 70150 states and 217346 transitions. [2021-03-10 21:25:31,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:31,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:31,967 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:32,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10493,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:32,167 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:32,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1009433127, now seen corresponding path program 197 times [2021-03-10 21:25:32,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:32,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63413469] [2021-03-10 21:25:32,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:32,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63413469] [2021-03-10 21:25:32,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368796485] [2021-03-10 21:25:32,226 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 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 21:25:32,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:25:32,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:32,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:32,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:32,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:32,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:32,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333097037] [2021-03-10 21:25:32,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:32,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:32,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:32,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:32,285 INFO L87 Difference]: Start difference. First operand 70150 states and 217346 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21:25:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:32,613 INFO L93 Difference]: Finished difference Result 81568 states and 251022 transitions. [2021-03-10 21:25:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:32,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 22 [2021-03-10 21:25:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:32,754 INFO L225 Difference]: With dead ends: 81568 [2021-03-10 21:25:32,754 INFO L226 Difference]: Without dead ends: 81568 [2021-03-10 21:25:32,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:25:33,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81568 states. [2021-03-10 21:25:34,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81568 to 71366. [2021-03-10 21:25:34,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71366 states, 71365 states have (on average 3.0934491697610875) internal successors, (220764), 71365 states have internal predecessors, (220764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:34,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71366 states to 71366 states and 220764 transitions. [2021-03-10 21:25:34,424 INFO L78 Accepts]: Start accepts. Automaton has 71366 states and 220764 transitions. Word has length 22 [2021-03-10 21:25:34,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:34,425 INFO L480 AbstractCegarLoop]: Abstraction has 71366 states and 220764 transitions. [2021-03-10 21:25:34,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21:25:34,425 INFO L276 IsEmpty]: Start isEmpty. Operand 71366 states and 220764 transitions. [2021-03-10 21:25:34,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:34,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:34,441 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:34,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10494,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:34,641 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:34,642 INFO L82 PathProgramCache]: Analyzing trace with hash 503086861, now seen corresponding path program 198 times [2021-03-10 21:25:34,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:34,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561322621] [2021-03-10 21:25:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:34,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561322621] [2021-03-10 21:25:34,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606193045] [2021-03-10 21:25:34,703 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 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 21:25:34,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:25:34,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:34,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:34,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:34,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:34,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:34,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030209969] [2021-03-10 21:25:34,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:34,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:34,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:34,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:34,762 INFO L87 Difference]: Start difference. First operand 71366 states and 220764 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21:25:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:35,217 INFO L93 Difference]: Finished difference Result 104720 states and 323372 transitions. [2021-03-10 21:25:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:25:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 22 [2021-03-10 21:25:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:35,433 INFO L225 Difference]: With dead ends: 104720 [2021-03-10 21:25:35,433 INFO L226 Difference]: Without dead ends: 104720 [2021-03-10 21:25:35,433 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:25:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104720 states. [2021-03-10 21:25:37,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104720 to 99727. [2021-03-10 21:25:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99727 states, 99726 states have (on average 3.0966046968694223) internal successors, (308812), 99726 states have internal predecessors, (308812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:37,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99727 states to 99727 states and 308812 transitions. [2021-03-10 21:25:37,613 INFO L78 Accepts]: Start accepts. Automaton has 99727 states and 308812 transitions. Word has length 22 [2021-03-10 21:25:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:37,613 INFO L480 AbstractCegarLoop]: Abstraction has 99727 states and 308812 transitions. [2021-03-10 21:25:37,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21:25:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 99727 states and 308812 transitions. [2021-03-10 21:25:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:37,630 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:37,630 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:37,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10495 [2021-03-10 21:25:37,835 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:37,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:37,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1986221799, now seen corresponding path program 199 times [2021-03-10 21:25:37,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:37,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423372594] [2021-03-10 21:25:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:37,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423372594] [2021-03-10 21:25:37,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238482736] [2021-03-10 21:25:37,908 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 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 21:25:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:37,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:37,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:37,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:37,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:37,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775231439] [2021-03-10 21:25:37,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:37,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:37,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:37,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:37,970 INFO L87 Difference]: Start difference. First operand 99727 states and 308812 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21:25:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:38,883 INFO L93 Difference]: Finished difference Result 122524 states and 378377 transitions. [2021-03-10 21:25:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:25:38,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 22 [2021-03-10 21:25:38,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:39,137 INFO L225 Difference]: With dead ends: 122524 [2021-03-10 21:25:39,137 INFO L226 Difference]: Without dead ends: 122524 [2021-03-10 21:25:39,138 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:25:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122524 states. [2021-03-10 21:25:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122524 to 119170. [2021-03-10 21:25:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119170 states, 119169 states have (on average 3.0954358935629234) internal successors, (368880), 119169 states have internal predecessors, (368880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119170 states to 119170 states and 368880 transitions. [2021-03-10 21:25:41,798 INFO L78 Accepts]: Start accepts. Automaton has 119170 states and 368880 transitions. Word has length 22 [2021-03-10 21:25:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:41,798 INFO L480 AbstractCegarLoop]: Abstraction has 119170 states and 368880 transitions. [2021-03-10 21:25:41,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21:25:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 119170 states and 368880 transitions. [2021-03-10 21:25:41,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:41,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:41,815 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:42,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10496 [2021-03-10 21:25:42,016 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:42,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:42,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2047516429, now seen corresponding path program 200 times [2021-03-10 21:25:42,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:42,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481291785] [2021-03-10 21:25:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:42,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481291785] [2021-03-10 21:25:42,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415203023] [2021-03-10 21:25:42,080 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 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 21:25:42,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:42,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:42,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:42,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:42,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:42,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:42,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866024557] [2021-03-10 21:25:42,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:42,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:42,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:42,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:42,144 INFO L87 Difference]: Start difference. First operand 119170 states and 368880 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:43,127 INFO L93 Difference]: Finished difference Result 149360 states and 458856 transitions. [2021-03-10 21:25:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:25:43,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:43,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:43,405 INFO L225 Difference]: With dead ends: 149360 [2021-03-10 21:25:43,405 INFO L226 Difference]: Without dead ends: 149360 [2021-03-10 21:25:43,406 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:43,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149360 states. [2021-03-10 21:25:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149360 to 66855. [2021-03-10 21:25:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66855 states, 66854 states have (on average 3.0857241152361863) internal successors, (206293), 66854 states have internal predecessors, (206293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:45,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66855 states to 66855 states and 206293 transitions. [2021-03-10 21:25:45,354 INFO L78 Accepts]: Start accepts. Automaton has 66855 states and 206293 transitions. Word has length 22 [2021-03-10 21:25:45,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:45,354 INFO L480 AbstractCegarLoop]: Abstraction has 66855 states and 206293 transitions. [2021-03-10 21:25:45,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:45,354 INFO L276 IsEmpty]: Start isEmpty. Operand 66855 states and 206293 transitions. [2021-03-10 21:25:45,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:45,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:45,369 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:45,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10497 [2021-03-10 21:25:45,570 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:45,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:45,570 INFO L82 PathProgramCache]: Analyzing trace with hash -564381491, now seen corresponding path program 201 times [2021-03-10 21:25:45,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:45,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585754535] [2021-03-10 21:25:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:45,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585754535] [2021-03-10 21:25:45,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450963673] [2021-03-10 21:25:45,641 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 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 21:25:45,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:25:45,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:45,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:45,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:45,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:45,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:45,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018997972] [2021-03-10 21:25:45,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:45,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:45,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:45,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:45,700 INFO L87 Difference]: Start difference. First operand 66855 states and 206293 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:46,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:46,175 INFO L93 Difference]: Finished difference Result 89497 states and 274720 transitions. [2021-03-10 21:25:46,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:25:46,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:46,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:46,331 INFO L225 Difference]: With dead ends: 89497 [2021-03-10 21:25:46,331 INFO L226 Difference]: Without dead ends: 89497 [2021-03-10 21:25:46,331 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=409, Invalid=781, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:25:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89497 states. [2021-03-10 21:25:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89497 to 43123. [2021-03-10 21:25:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43123 states, 43122 states have (on average 3.0917397152265664) internal successors, (133322), 43122 states have internal predecessors, (133322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43123 states to 43123 states and 133322 transitions. [2021-03-10 21:25:47,651 INFO L78 Accepts]: Start accepts. Automaton has 43123 states and 133322 transitions. Word has length 22 [2021-03-10 21:25:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:47,651 INFO L480 AbstractCegarLoop]: Abstraction has 43123 states and 133322 transitions. [2021-03-10 21:25:47,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 43123 states and 133322 transitions. [2021-03-10 21:25:47,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:47,663 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:47,663 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:47,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10498 [2021-03-10 21:25:47,863 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:47,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:47,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1579474701, now seen corresponding path program 202 times [2021-03-10 21:25:47,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:47,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807676934] [2021-03-10 21:25:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:47,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807676934] [2021-03-10 21:25:47,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136840242] [2021-03-10 21:25:47,925 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 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 21:25:47,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:47,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:47,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:47,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:47,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:47,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:47,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625752410] [2021-03-10 21:25:47,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:47,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:47,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:47,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:47,990 INFO L87 Difference]: Start difference. First operand 43123 states and 133322 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:48,216 INFO L93 Difference]: Finished difference Result 46015 states and 141473 transitions. [2021-03-10 21:25:48,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:48,216 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:25:48,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:48,288 INFO L225 Difference]: With dead ends: 46015 [2021-03-10 21:25:48,289 INFO L226 Difference]: Without dead ends: 46015 [2021-03-10 21:25:48,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:25:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46015 states. [2021-03-10 21:25:49,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46015 to 33259. [2021-03-10 21:25:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33259 states, 33258 states have (on average 3.08671597811053) internal successors, (102658), 33258 states have internal predecessors, (102658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33259 states to 33259 states and 102658 transitions. [2021-03-10 21:25:49,120 INFO L78 Accepts]: Start accepts. Automaton has 33259 states and 102658 transitions. Word has length 22 [2021-03-10 21:25:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:49,120 INFO L480 AbstractCegarLoop]: Abstraction has 33259 states and 102658 transitions. [2021-03-10 21:25:49,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 33259 states and 102658 transitions. [2021-03-10 21:25:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:49,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:49,129 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:49,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10499 [2021-03-10 21:25:49,330 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:49,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2117330279, now seen corresponding path program 203 times [2021-03-10 21:25:49,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:49,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268279337] [2021-03-10 21:25:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:49,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268279337] [2021-03-10 21:25:49,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813531288] [2021-03-10 21:25:49,388 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 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 21:25:49,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:25:49,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:49,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:49,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:49,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:49,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:49,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348874934] [2021-03-10 21:25:49,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:49,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:49,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:49,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:49,448 INFO L87 Difference]: Start difference. First operand 33259 states and 102658 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:49,612 INFO L93 Difference]: Finished difference Result 35745 states and 109875 transitions. [2021-03-10 21:25:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:25:49,612 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:25:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:49,663 INFO L225 Difference]: With dead ends: 35745 [2021-03-10 21:25:49,663 INFO L226 Difference]: Without dead ends: 35745 [2021-03-10 21:25:49,663 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:49,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35745 states. [2021-03-10 21:25:50,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35745 to 35523. [2021-03-10 21:25:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35523 states, 35522 states have (on average 3.083694611789877) internal successors, (109539), 35522 states have internal predecessors, (109539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35523 states to 35523 states and 109539 transitions. [2021-03-10 21:25:50,332 INFO L78 Accepts]: Start accepts. Automaton has 35523 states and 109539 transitions. Word has length 22 [2021-03-10 21:25:50,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:50,332 INFO L480 AbstractCegarLoop]: Abstraction has 35523 states and 109539 transitions. [2021-03-10 21:25:50,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:25:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 35523 states and 109539 transitions. [2021-03-10 21:25:50,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:50,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:50,341 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:50,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10500,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:50,542 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:50,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1610984013, now seen corresponding path program 204 times [2021-03-10 21:25:50,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:50,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006811275] [2021-03-10 21:25:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:50,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006811275] [2021-03-10 21:25:50,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544469159] [2021-03-10 21:25:50,608 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 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 21:25:50,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:25:50,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:50,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:50,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:50,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:50,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:50,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560576017] [2021-03-10 21:25:50,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:50,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:50,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:50,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:50,667 INFO L87 Difference]: Start difference. First operand 35523 states and 109539 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:50,870 INFO L93 Difference]: Finished difference Result 36167 states and 111049 transitions. [2021-03-10 21:25:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:25:50,870 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:50,923 INFO L225 Difference]: With dead ends: 36167 [2021-03-10 21:25:50,923 INFO L226 Difference]: Without dead ends: 36167 [2021-03-10 21:25:50,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:25:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36167 states. [2021-03-10 21:25:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36167 to 33964. [2021-03-10 21:25:51,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33964 states, 33963 states have (on average 3.083973736124606) internal successors, (104741), 33963 states have internal predecessors, (104741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:51,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33964 states to 33964 states and 104741 transitions. [2021-03-10 21:25:51,620 INFO L78 Accepts]: Start accepts. Automaton has 33964 states and 104741 transitions. Word has length 22 [2021-03-10 21:25:51,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:51,620 INFO L480 AbstractCegarLoop]: Abstraction has 33964 states and 104741 transitions. [2021-03-10 21:25:51,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:51,620 INFO L276 IsEmpty]: Start isEmpty. Operand 33964 states and 104741 transitions. [2021-03-10 21:25:51,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:51,630 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:51,630 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:51,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10501 [2021-03-10 21:25:51,830 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:51,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:51,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1200848345, now seen corresponding path program 205 times [2021-03-10 21:25:51,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:51,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135668625] [2021-03-10 21:25:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:51,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135668625] [2021-03-10 21:25:51,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972084438] [2021-03-10 21:25:51,898 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 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 21:25:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:51,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:51,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:51,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:51,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:51,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095148212] [2021-03-10 21:25:51,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:51,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:51,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:51,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:51,957 INFO L87 Difference]: Start difference. First operand 33964 states and 104741 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:52,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:52,212 INFO L93 Difference]: Finished difference Result 36419 states and 111773 transitions. [2021-03-10 21:25:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:52,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:52,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:52,267 INFO L225 Difference]: With dead ends: 36419 [2021-03-10 21:25:52,267 INFO L226 Difference]: Without dead ends: 36419 [2021-03-10 21:25:52,267 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=284, Invalid=586, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:25:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36419 states. [2021-03-10 21:25:52,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36419 to 34818. [2021-03-10 21:25:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34818 states, 34817 states have (on average 3.083206479593302) internal successors, (107348), 34817 states have internal predecessors, (107348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34818 states to 34818 states and 107348 transitions. [2021-03-10 21:25:52,991 INFO L78 Accepts]: Start accepts. Automaton has 34818 states and 107348 transitions. Word has length 22 [2021-03-10 21:25:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:52,991 INFO L480 AbstractCegarLoop]: Abstraction has 34818 states and 107348 transitions. [2021-03-10 21:25:52,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 34818 states and 107348 transitions. [2021-03-10 21:25:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:53,001 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:53,001 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:53,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10502 [2021-03-10 21:25:53,201 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:53,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:53,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1826661773, now seen corresponding path program 206 times [2021-03-10 21:25:53,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:53,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763895907] [2021-03-10 21:25:53,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:53,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763895907] [2021-03-10 21:25:53,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571244221] [2021-03-10 21:25:53,280 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 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 21:25:53,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:53,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:53,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:53,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:53,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:53,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438459728] [2021-03-10 21:25:53,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:53,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:53,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:53,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:53,345 INFO L87 Difference]: Start difference. First operand 34818 states and 107348 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:53,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:53,725 INFO L93 Difference]: Finished difference Result 36428 states and 111724 transitions. [2021-03-10 21:25:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:25:53,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:25:53,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:53,780 INFO L225 Difference]: With dead ends: 36428 [2021-03-10 21:25:53,781 INFO L226 Difference]: Without dead ends: 36428 [2021-03-10 21:25:53,781 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=524, Invalid=1036, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:25:53,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36428 states. [2021-03-10 21:25:54,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36428 to 34194. [2021-03-10 21:25:54,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853683502471267) internal successors, (105498), 34193 states have internal predecessors, (105498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105498 transitions. [2021-03-10 21:25:54,456 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105498 transitions. Word has length 22 [2021-03-10 21:25:54,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:54,456 INFO L480 AbstractCegarLoop]: Abstraction has 34194 states and 105498 transitions. [2021-03-10 21:25:54,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:25:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105498 transitions. [2021-03-10 21:25:54,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:54,465 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:54,465 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:54,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10503,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:54,666 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:54,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1663098905, now seen corresponding path program 207 times [2021-03-10 21:25:54,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:54,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75557970] [2021-03-10 21:25:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:54,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75557970] [2021-03-10 21:25:54,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97488632] [2021-03-10 21:25:54,711 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 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 21:25:54,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:25:54,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:54,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:54,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:25:54,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:54,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:25:54,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920728248] [2021-03-10 21:25:54,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:25:54,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:54,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:25:54,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:54,766 INFO L87 Difference]: Start difference. First operand 34194 states and 105498 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21:25:54,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:54,995 INFO L93 Difference]: Finished difference Result 34348 states and 105669 transitions. [2021-03-10 21:25:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:25:54,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 22 [2021-03-10 21:25:54,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:55,043 INFO L225 Difference]: With dead ends: 34348 [2021-03-10 21:25:55,043 INFO L226 Difference]: Without dead ends: 34344 [2021-03-10 21:25:55,043 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:25:55,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34344 states. [2021-03-10 21:25:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34344 to 34194. [2021-03-10 21:25:55,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853098587430177) internal successors, (105496), 34193 states have internal predecessors, (105496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:55,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105496 transitions. [2021-03-10 21:25:55,624 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105496 transitions. Word has length 22 [2021-03-10 21:25:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:55,624 INFO L480 AbstractCegarLoop]: Abstraction has 34194 states and 105496 transitions. [2021-03-10 21:25:55,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21:25:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105496 transitions. [2021-03-10 21:25:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:55,633 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:55,633 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:55,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10504 [2021-03-10 21:25:55,833 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:55,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:55,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1971295143, now seen corresponding path program 208 times [2021-03-10 21:25:55,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:55,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220575351] [2021-03-10 21:25:55,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:55,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220575351] [2021-03-10 21:25:55,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307877944] [2021-03-10 21:25:55,901 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 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 21:25:55,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:55,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:55,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:55,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:55,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:55,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:25:55,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281986744] [2021-03-10 21:25:55,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:55,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:55,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:55,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:55,964 INFO L87 Difference]: Start difference. First operand 34194 states and 105496 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:25:56,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:56,265 INFO L93 Difference]: Finished difference Result 37342 states and 114450 transitions. [2021-03-10 21:25:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:25:56,266 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:25:56,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:56,319 INFO L225 Difference]: With dead ends: 37342 [2021-03-10 21:25:56,319 INFO L226 Difference]: Without dead ends: 37342 [2021-03-10 21:25:56,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=415, Invalid=775, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:25:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2021-03-10 21:25:56,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 32084. [2021-03-10 21:25:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32084 states, 32083 states have (on average 3.0869307733067357) internal successors, (99038), 32083 states have internal predecessors, (99038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32084 states to 32084 states and 99038 transitions. [2021-03-10 21:25:56,923 INFO L78 Accepts]: Start accepts. Automaton has 32084 states and 99038 transitions. Word has length 22 [2021-03-10 21:25:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:56,923 INFO L480 AbstractCegarLoop]: Abstraction has 32084 states and 99038 transitions. [2021-03-10 21:25:56,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:25:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 32084 states and 99038 transitions. [2021-03-10 21:25:56,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:56,932 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:56,932 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:57,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10505 [2021-03-10 21:25:57,132 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:57,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1334828289, now seen corresponding path program 209 times [2021-03-10 21:25:57,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:57,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131785067] [2021-03-10 21:25:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:57,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131785067] [2021-03-10 21:25:57,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153128810] [2021-03-10 21:25:57,202 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 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 21:25:57,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:25:57,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:57,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:57,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:57,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:57,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:25:57,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282461248] [2021-03-10 21:25:57,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:57,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:57,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:57,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:57,268 INFO L87 Difference]: Start difference. First operand 32084 states and 99038 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:25:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:57,519 INFO L93 Difference]: Finished difference Result 32697 states and 100396 transitions. [2021-03-10 21:25:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:25:57,520 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:25:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:57,566 INFO L225 Difference]: With dead ends: 32697 [2021-03-10 21:25:57,566 INFO L226 Difference]: Without dead ends: 32697 [2021-03-10 21:25:57,566 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:25:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32697 states. [2021-03-10 21:25:58,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32697 to 31320. [2021-03-10 21:25:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31320 states, 31319 states have (on average 3.0872313930840702) internal successors, (96689), 31319 states have internal predecessors, (96689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31320 states to 31320 states and 96689 transitions. [2021-03-10 21:25:58,172 INFO L78 Accepts]: Start accepts. Automaton has 31320 states and 96689 transitions. Word has length 22 [2021-03-10 21:25:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:58,172 INFO L480 AbstractCegarLoop]: Abstraction has 31320 states and 96689 transitions. [2021-03-10 21:25:58,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:25:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 31320 states and 96689 transitions. [2021-03-10 21:25:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:58,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:58,180 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:58,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10506,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:58,381 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:58,381 INFO L82 PathProgramCache]: Analyzing trace with hash 67371111, now seen corresponding path program 210 times [2021-03-10 21:25:58,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:58,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421740587] [2021-03-10 21:25:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:58,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421740587] [2021-03-10 21:25:58,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193027882] [2021-03-10 21:25:58,460 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 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 21:25:58,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:25:58,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:58,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:58,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:58,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:58,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:25:58,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597646627] [2021-03-10 21:25:58,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:58,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:58,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:58,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:58,533 INFO L87 Difference]: Start difference. First operand 31320 states and 96689 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:25:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:58,896 INFO L93 Difference]: Finished difference Result 33049 states and 101433 transitions. [2021-03-10 21:25:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:25:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:25:58,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:58,943 INFO L225 Difference]: With dead ends: 33049 [2021-03-10 21:25:58,943 INFO L226 Difference]: Without dead ends: 33049 [2021-03-10 21:25:58,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=561, Invalid=1079, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:25:58,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33049 states. [2021-03-10 21:25:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33049 to 30873. [2021-03-10 21:25:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30873 states, 30872 states have (on average 3.089045089401399) internal successors, (95365), 30872 states have internal predecessors, (95365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30873 states to 30873 states and 95365 transitions. [2021-03-10 21:25:59,599 INFO L78 Accepts]: Start accepts. Automaton has 30873 states and 95365 transitions. Word has length 22 [2021-03-10 21:25:59,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:59,599 INFO L480 AbstractCegarLoop]: Abstraction has 30873 states and 95365 transitions. [2021-03-10 21:25:59,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:25:59,599 INFO L276 IsEmpty]: Start isEmpty. Operand 30873 states and 95365 transitions. [2021-03-10 21:25:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:59,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:59,606 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:59,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10507,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:59,807 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:59,807 INFO L82 PathProgramCache]: Analyzing trace with hash -658261175, now seen corresponding path program 211 times [2021-03-10 21:25:59,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:59,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342297005] [2021-03-10 21:25:59,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:59,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342297005] [2021-03-10 21:25:59,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427768635] [2021-03-10 21:25:59,859 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 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 21:25:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:59,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:59,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:59,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:59,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:59,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085665001] [2021-03-10 21:25:59,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:59,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:59,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:59,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:59,912 INFO L87 Difference]: Start difference. First operand 30873 states and 95365 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:26:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:00,126 INFO L93 Difference]: Finished difference Result 31092 states and 95691 transitions. [2021-03-10 21:26:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:00,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:26:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:00,172 INFO L225 Difference]: With dead ends: 31092 [2021-03-10 21:26:00,172 INFO L226 Difference]: Without dead ends: 31088 [2021-03-10 21:26:00,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31088 states. [2021-03-10 21:26:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31088 to 30908. [2021-03-10 21:26:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30908 states, 30907 states have (on average 3.088588345682208) internal successors, (95459), 30907 states have internal predecessors, (95459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30908 states to 30908 states and 95459 transitions. [2021-03-10 21:26:00,627 INFO L78 Accepts]: Start accepts. Automaton has 30908 states and 95459 transitions. Word has length 22 [2021-03-10 21:26:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:00,627 INFO L480 AbstractCegarLoop]: Abstraction has 30908 states and 95459 transitions. [2021-03-10 21:26:00,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:26:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 30908 states and 95459 transitions. [2021-03-10 21:26:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:00,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:00,855 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:01,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10508,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:01,059 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:01,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:01,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1059487885, now seen corresponding path program 212 times [2021-03-10 21:26:01,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:01,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747711946] [2021-03-10 21:26:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:01,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747711946] [2021-03-10 21:26:01,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103804737] [2021-03-10 21:26:01,111 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 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 21:26:01,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:01,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:01,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:01,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:01,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:01,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:01,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204290292] [2021-03-10 21:26:01,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:01,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:01,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:01,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:01,169 INFO L87 Difference]: Start difference. First operand 30908 states and 95459 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:26:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:01,330 INFO L93 Difference]: Finished difference Result 31582 states and 97082 transitions. [2021-03-10 21:26:01,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:26:01,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:26:01,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:01,376 INFO L225 Difference]: With dead ends: 31582 [2021-03-10 21:26:01,377 INFO L226 Difference]: Without dead ends: 31582 [2021-03-10 21:26:01,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:26:01,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31582 states. [2021-03-10 21:26:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31582 to 30923. [2021-03-10 21:26:01,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30923 states, 30922 states have (on average 3.0885130327921866) internal successors, (95503), 30922 states have internal predecessors, (95503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30923 states to 30923 states and 95503 transitions. [2021-03-10 21:26:01,824 INFO L78 Accepts]: Start accepts. Automaton has 30923 states and 95503 transitions. Word has length 22 [2021-03-10 21:26:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:01,825 INFO L480 AbstractCegarLoop]: Abstraction has 30923 states and 95503 transitions. [2021-03-10 21:26:01,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:26:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 30923 states and 95503 transitions. [2021-03-10 21:26:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:01,832 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:01,832 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:02,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10509,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:02,033 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:02,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:02,033 INFO L82 PathProgramCache]: Analyzing trace with hash -669559449, now seen corresponding path program 213 times [2021-03-10 21:26:02,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:02,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203639936] [2021-03-10 21:26:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:02,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203639936] [2021-03-10 21:26:02,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971947750] [2021-03-10 21:26:02,088 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 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 21:26:02,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:26:02,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:02,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:02,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:02,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:02,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:02,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363762626] [2021-03-10 21:26:02,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:02,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:02,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:02,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:02,154 INFO L87 Difference]: Start difference. First operand 30923 states and 95503 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:26:02,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:02,483 INFO L93 Difference]: Finished difference Result 31896 states and 97991 transitions. [2021-03-10 21:26:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:26:02,484 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:26:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:02,523 INFO L225 Difference]: With dead ends: 31896 [2021-03-10 21:26:02,524 INFO L226 Difference]: Without dead ends: 31896 [2021-03-10 21:26:02,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=193, Invalid=313, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:02,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31896 states. [2021-03-10 21:26:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31896 to 30949. [2021-03-10 21:26:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30949 states, 30948 states have (on average 3.0883094222566885) internal successors, (95577), 30948 states have internal predecessors, (95577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30949 states to 30949 states and 95577 transitions. [2021-03-10 21:26:02,942 INFO L78 Accepts]: Start accepts. Automaton has 30949 states and 95577 transitions. Word has length 22 [2021-03-10 21:26:02,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:02,942 INFO L480 AbstractCegarLoop]: Abstraction has 30949 states and 95577 transitions. [2021-03-10 21:26:02,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:26:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 30949 states and 95577 transitions. [2021-03-10 21:26:02,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:02,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:02,950 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:03,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10510,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:03,150 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:03,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:03,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1564548045, now seen corresponding path program 214 times [2021-03-10 21:26:03,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:03,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082179325] [2021-03-10 21:26:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:03,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082179325] [2021-03-10 21:26:03,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198859438] [2021-03-10 21:26:03,207 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 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 21:26:03,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:03,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:03,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:03,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:03,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:03,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:26:03,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294473444] [2021-03-10 21:26:03,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:03,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:03,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:03,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:03,269 INFO L87 Difference]: Start difference. First operand 30949 states and 95577 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:03,457 INFO L93 Difference]: Finished difference Result 31958 states and 98178 transitions. [2021-03-10 21:26:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:26:03,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:26:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:03,504 INFO L225 Difference]: With dead ends: 31958 [2021-03-10 21:26:03,505 INFO L226 Difference]: Without dead ends: 31958 [2021-03-10 21:26:03,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:26:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31958 states. [2021-03-10 21:26:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31958 to 30995. [2021-03-10 21:26:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30995 states, 30994 states have (on average 3.0880170355552687) internal successors, (95710), 30994 states have internal predecessors, (95710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:04,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30995 states to 30995 states and 95710 transitions. [2021-03-10 21:26:04,112 INFO L78 Accepts]: Start accepts. Automaton has 30995 states and 95710 transitions. Word has length 22 [2021-03-10 21:26:04,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:04,112 INFO L480 AbstractCegarLoop]: Abstraction has 30995 states and 95710 transitions. [2021-03-10 21:26:04,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:04,112 INFO L276 IsEmpty]: Start isEmpty. Operand 30995 states and 95710 transitions. [2021-03-10 21:26:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:04,119 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:04,119 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:04,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10511 [2021-03-10 21:26:04,320 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:04,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:04,320 INFO L82 PathProgramCache]: Analyzing trace with hash 2102403623, now seen corresponding path program 215 times [2021-03-10 21:26:04,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:04,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480585970] [2021-03-10 21:26:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:04,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480585970] [2021-03-10 21:26:04,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383898736] [2021-03-10 21:26:04,383 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 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 21:26:04,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:04,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:04,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:04,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:04,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:04,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:26:04,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712064541] [2021-03-10 21:26:04,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:04,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:04,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:04,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:04,448 INFO L87 Difference]: Start difference. First operand 30995 states and 95710 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:04,647 INFO L93 Difference]: Finished difference Result 36047 states and 110795 transitions. [2021-03-10 21:26:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:26:04,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:26:04,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:04,700 INFO L225 Difference]: With dead ends: 36047 [2021-03-10 21:26:04,700 INFO L226 Difference]: Without dead ends: 36047 [2021-03-10 21:26:04,700 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:04,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36047 states. [2021-03-10 21:26:05,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36047 to 35338. [2021-03-10 21:26:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35338 states, 35337 states have (on average 3.0890001980926507) internal successors, (109156), 35337 states have internal predecessors, (109156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:05,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35338 states to 35338 states and 109156 transitions. [2021-03-10 21:26:05,317 INFO L78 Accepts]: Start accepts. Automaton has 35338 states and 109156 transitions. Word has length 22 [2021-03-10 21:26:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:05,317 INFO L480 AbstractCegarLoop]: Abstraction has 35338 states and 109156 transitions. [2021-03-10 21:26:05,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 35338 states and 109156 transitions. [2021-03-10 21:26:05,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:05,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:05,325 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:05,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10512 [2021-03-10 21:26:05,526 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:05,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:05,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1596057357, now seen corresponding path program 216 times [2021-03-10 21:26:05,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:05,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813602693] [2021-03-10 21:26:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:05,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813602693] [2021-03-10 21:26:05,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758027005] [2021-03-10 21:26:05,589 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 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 21:26:05,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:05,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:05,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:05,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:05,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:05,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:26:05,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533638058] [2021-03-10 21:26:05,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:05,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:05,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:05,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:05,654 INFO L87 Difference]: Start difference. First operand 35338 states and 109156 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:05,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:05,835 INFO L93 Difference]: Finished difference Result 39264 states and 120741 transitions. [2021-03-10 21:26:05,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:26:05,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:26:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:05,893 INFO L225 Difference]: With dead ends: 39264 [2021-03-10 21:26:05,893 INFO L226 Difference]: Without dead ends: 39264 [2021-03-10 21:26:05,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:05,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39264 states. [2021-03-10 21:26:06,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39264 to 38914. [2021-03-10 21:26:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38914 states, 38913 states have (on average 3.083982216739907) internal successors, (120007), 38913 states have internal predecessors, (120007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:06,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38914 states to 38914 states and 120007 transitions. [2021-03-10 21:26:06,565 INFO L78 Accepts]: Start accepts. Automaton has 38914 states and 120007 transitions. Word has length 22 [2021-03-10 21:26:06,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:06,565 INFO L480 AbstractCegarLoop]: Abstraction has 38914 states and 120007 transitions. [2021-03-10 21:26:06,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:06,565 INFO L276 IsEmpty]: Start isEmpty. Operand 38914 states and 120007 transitions. [2021-03-10 21:26:06,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:06,575 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:06,575 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:06,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10513,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:06,775 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:06,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:06,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1215775001, now seen corresponding path program 217 times [2021-03-10 21:26:06,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:06,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352873219] [2021-03-10 21:26:06,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:06,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352873219] [2021-03-10 21:26:06,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399589948] [2021-03-10 21:26:06,845 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 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 21:26:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:06,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:06,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:06,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:06,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:06,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131762572] [2021-03-10 21:26:06,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:06,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:06,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:06,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:06,909 INFO L87 Difference]: Start difference. First operand 38914 states and 120007 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:07,137 INFO L93 Difference]: Finished difference Result 39365 states and 121002 transitions. [2021-03-10 21:26:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:26:07,138 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:07,195 INFO L225 Difference]: With dead ends: 39365 [2021-03-10 21:26:07,196 INFO L226 Difference]: Without dead ends: 39365 [2021-03-10 21:26:07,196 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:26:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39365 states. [2021-03-10 21:26:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39365 to 38918. [2021-03-10 21:26:07,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38918 states, 38917 states have (on average 3.0839735848086955) internal successors, (120019), 38917 states have internal predecessors, (120019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38918 states to 38918 states and 120019 transitions. [2021-03-10 21:26:07,905 INFO L78 Accepts]: Start accepts. Automaton has 38918 states and 120019 transitions. Word has length 22 [2021-03-10 21:26:07,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:07,905 INFO L480 AbstractCegarLoop]: Abstraction has 38918 states and 120019 transitions. [2021-03-10 21:26:07,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 38918 states and 120019 transitions. [2021-03-10 21:26:07,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:07,915 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:07,915 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:08,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10514 [2021-03-10 21:26:08,115 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:08,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:08,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1811735117, now seen corresponding path program 218 times [2021-03-10 21:26:08,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:08,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759573167] [2021-03-10 21:26:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:08,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759573167] [2021-03-10 21:26:08,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853437719] [2021-03-10 21:26:08,189 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 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 21:26:08,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:08,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:08,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:08,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:08,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:08,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:08,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100145247] [2021-03-10 21:26:08,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:08,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:08,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:08,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:08,253 INFO L87 Difference]: Start difference. First operand 38918 states and 120019 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:08,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:08,579 INFO L93 Difference]: Finished difference Result 40630 states and 124791 transitions. [2021-03-10 21:26:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:08,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:08,639 INFO L225 Difference]: With dead ends: 40630 [2021-03-10 21:26:08,639 INFO L226 Difference]: Without dead ends: 40630 [2021-03-10 21:26:08,639 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:26:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40630 states. [2021-03-10 21:26:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40630 to 40219. [2021-03-10 21:26:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40219 states, 40218 states have (on average 3.082301457059028) internal successors, (123964), 40218 states have internal predecessors, (123964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40219 states to 40219 states and 123964 transitions. [2021-03-10 21:26:09,394 INFO L78 Accepts]: Start accepts. Automaton has 40219 states and 123964 transitions. Word has length 22 [2021-03-10 21:26:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:09,394 INFO L480 AbstractCegarLoop]: Abstraction has 40219 states and 123964 transitions. [2021-03-10 21:26:09,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:09,395 INFO L276 IsEmpty]: Start isEmpty. Operand 40219 states and 123964 transitions. [2021-03-10 21:26:09,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:09,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:09,405 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:09,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10515,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:09,605 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:09,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1175268263, now seen corresponding path program 219 times [2021-03-10 21:26:09,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:09,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202992550] [2021-03-10 21:26:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:09,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202992550] [2021-03-10 21:26:09,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128233695] [2021-03-10 21:26:09,682 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 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 21:26:09,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:09,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:09,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:09,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:09,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:09,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:09,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195529130] [2021-03-10 21:26:09,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:09,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:09,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:09,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:09,749 INFO L87 Difference]: Start difference. First operand 40219 states and 123964 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:10,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:10,178 INFO L93 Difference]: Finished difference Result 42248 states and 129555 transitions. [2021-03-10 21:26:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:26:10,178 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:10,238 INFO L225 Difference]: With dead ends: 42248 [2021-03-10 21:26:10,238 INFO L226 Difference]: Without dead ends: 42248 [2021-03-10 21:26:10,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=665, Invalid=1315, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:26:10,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42248 states. [2021-03-10 21:26:10,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42248 to 41433. [2021-03-10 21:26:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41433 states, 41432 states have (on average 3.080614018150222) internal successors, (127636), 41432 states have internal predecessors, (127636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41433 states to 41433 states and 127636 transitions. [2021-03-10 21:26:10,928 INFO L78 Accepts]: Start accepts. Automaton has 41433 states and 127636 transitions. Word has length 22 [2021-03-10 21:26:10,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:10,928 INFO L480 AbstractCegarLoop]: Abstraction has 41433 states and 127636 transitions. [2021-03-10 21:26:10,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:10,928 INFO L276 IsEmpty]: Start isEmpty. Operand 41433 states and 127636 transitions. [2021-03-10 21:26:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:10,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:10,939 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:11,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10516,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:11,139 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:11,139 INFO L82 PathProgramCache]: Analyzing trace with hash -141305647, now seen corresponding path program 220 times [2021-03-10 21:26:11,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:11,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156572223] [2021-03-10 21:26:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:11,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156572223] [2021-03-10 21:26:11,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238375008] [2021-03-10 21:26:11,199 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 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 21:26:11,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:11,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:11,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:11,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:11,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:11,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:26:11,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314330048] [2021-03-10 21:26:11,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:11,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:11,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:11,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:11,256 INFO L87 Difference]: Start difference. First operand 41433 states and 127636 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21:26:11,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:11,701 INFO L93 Difference]: Finished difference Result 41740 states and 128184 transitions. [2021-03-10 21:26:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:26:11,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 22 [2021-03-10 21:26:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:11,758 INFO L225 Difference]: With dead ends: 41740 [2021-03-10 21:26:11,758 INFO L226 Difference]: Without dead ends: 41734 [2021-03-10 21:26:11,758 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:26:11,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41734 states. [2021-03-10 21:26:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41734 to 40967. [2021-03-10 21:26:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40967 states, 40966 states have (on average 3.0791632085143776) internal successors, (126141), 40966 states have internal predecessors, (126141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:12,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40967 states to 40967 states and 126141 transitions. [2021-03-10 21:26:12,342 INFO L78 Accepts]: Start accepts. Automaton has 40967 states and 126141 transitions. Word has length 22 [2021-03-10 21:26:12,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:12,342 INFO L480 AbstractCegarLoop]: Abstraction has 40967 states and 126141 transitions. [2021-03-10 21:26:12,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21:26:12,342 INFO L276 IsEmpty]: Start isEmpty. Operand 40967 states and 126141 transitions. [2021-03-10 21:26:12,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:12,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:12,353 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:12,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10517 [2021-03-10 21:26:12,553 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:12,553 INFO L82 PathProgramCache]: Analyzing trace with hash 429354799, now seen corresponding path program 221 times [2021-03-10 21:26:12,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:12,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831687421] [2021-03-10 21:26:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:12,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831687421] [2021-03-10 21:26:12,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336117763] [2021-03-10 21:26:12,612 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 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 21:26:12,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:12,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:12,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:12,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:12,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:12,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:26:12,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977782497] [2021-03-10 21:26:12,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:12,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:12,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:12,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:12,682 INFO L87 Difference]: Start difference. First operand 40967 states and 126141 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:26:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:12,974 INFO L93 Difference]: Finished difference Result 46670 states and 143099 transitions. [2021-03-10 21:26:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:26:12,975 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:26:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:13,041 INFO L225 Difference]: With dead ends: 46670 [2021-03-10 21:26:13,041 INFO L226 Difference]: Without dead ends: 46670 [2021-03-10 21:26:13,041 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:26:13,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46670 states. [2021-03-10 21:26:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46670 to 45904. [2021-03-10 21:26:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45904 states, 45903 states have (on average 3.0725224930832407) internal successors, (141038), 45903 states have internal predecessors, (141038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45904 states to 45904 states and 141038 transitions. [2021-03-10 21:26:13,936 INFO L78 Accepts]: Start accepts. Automaton has 45904 states and 141038 transitions. Word has length 22 [2021-03-10 21:26:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:13,936 INFO L480 AbstractCegarLoop]: Abstraction has 45904 states and 141038 transitions. [2021-03-10 21:26:13,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:26:13,937 INFO L276 IsEmpty]: Start isEmpty. Operand 45904 states and 141038 transitions. [2021-03-10 21:26:13,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:13,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:13,948 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:14,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10518,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:14,148 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:14,148 INFO L82 PathProgramCache]: Analyzing trace with hash -76991467, now seen corresponding path program 222 times [2021-03-10 21:26:14,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:14,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738289178] [2021-03-10 21:26:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:14,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738289178] [2021-03-10 21:26:14,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60193888] [2021-03-10 21:26:14,221 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 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 21:26:14,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:26:14,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:14,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:14,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:14,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:14,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:26:14,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291418420] [2021-03-10 21:26:14,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:14,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:14,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:14,286 INFO L87 Difference]: Start difference. First operand 45904 states and 141038 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:14,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:14,539 INFO L93 Difference]: Finished difference Result 49343 states and 151040 transitions. [2021-03-10 21:26:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:26:14,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:26:14,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:14,618 INFO L225 Difference]: With dead ends: 49343 [2021-03-10 21:26:14,618 INFO L226 Difference]: Without dead ends: 49343 [2021-03-10 21:26:14,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:26:14,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49343 states. [2021-03-10 21:26:15,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49343 to 46131. [2021-03-10 21:26:15,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46131 states, 46130 states have (on average 3.0718621287665293) internal successors, (141705), 46130 states have internal predecessors, (141705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46131 states to 46131 states and 141705 transitions. [2021-03-10 21:26:15,483 INFO L78 Accepts]: Start accepts. Automaton has 46131 states and 141705 transitions. Word has length 22 [2021-03-10 21:26:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:15,484 INFO L480 AbstractCegarLoop]: Abstraction has 46131 states and 141705 transitions. [2021-03-10 21:26:15,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:15,484 INFO L276 IsEmpty]: Start isEmpty. Operand 46131 states and 141705 transitions. [2021-03-10 21:26:15,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:15,496 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:15,497 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:15,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10519,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:15,697 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:15,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:15,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1406143471, now seen corresponding path program 223 times [2021-03-10 21:26:15,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:15,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025735845] [2021-03-10 21:26:15,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:15,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025735845] [2021-03-10 21:26:15,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105513454] [2021-03-10 21:26:15,764 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 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 21:26:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:15,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:15,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:15,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:15,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:26:15,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472416771] [2021-03-10 21:26:15,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:15,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:15,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:15,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:15,821 INFO L87 Difference]: Start difference. First operand 46131 states and 141705 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:16,141 INFO L93 Difference]: Finished difference Result 55150 states and 168573 transitions. [2021-03-10 21:26:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:26:16,141 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:26:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:16,238 INFO L225 Difference]: With dead ends: 55150 [2021-03-10 21:26:16,239 INFO L226 Difference]: Without dead ends: 55150 [2021-03-10 21:26:16,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:26:16,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55150 states. [2021-03-10 21:26:17,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55150 to 52518. [2021-03-10 21:26:17,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52518 states, 52517 states have (on average 3.067406744482739) internal successors, (161091), 52517 states have internal predecessors, (161091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52518 states to 52518 states and 161091 transitions. [2021-03-10 21:26:17,197 INFO L78 Accepts]: Start accepts. Automaton has 52518 states and 161091 transitions. Word has length 22 [2021-03-10 21:26:17,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:17,197 INFO L480 AbstractCegarLoop]: Abstraction has 52518 states and 161091 transitions. [2021-03-10 21:26:17,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:17,197 INFO L276 IsEmpty]: Start isEmpty. Operand 52518 states and 161091 transitions. [2021-03-10 21:26:17,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:17,211 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:17,211 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:17,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10520 [2021-03-10 21:26:17,411 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:17,412 INFO L82 PathProgramCache]: Analyzing trace with hash 138686293, now seen corresponding path program 224 times [2021-03-10 21:26:17,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:17,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106374025] [2021-03-10 21:26:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:17,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106374025] [2021-03-10 21:26:17,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434853725] [2021-03-10 21:26:17,482 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 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 21:26:17,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:17,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:17,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:17,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:17,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:26:17,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145415450] [2021-03-10 21:26:17,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:17,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:17,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:17,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:17,539 INFO L87 Difference]: Start difference. First operand 52518 states and 161091 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:17,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:17,969 INFO L93 Difference]: Finished difference Result 68037 states and 207399 transitions. [2021-03-10 21:26:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:26:17,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:26:17,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:18,083 INFO L225 Difference]: With dead ends: 68037 [2021-03-10 21:26:18,083 INFO L226 Difference]: Without dead ends: 68037 [2021-03-10 21:26:18,083 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=523, Invalid=1037, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:26:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68037 states. [2021-03-10 21:26:19,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68037 to 63418. [2021-03-10 21:26:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63418 states, 63417 states have (on average 3.060788116751029) internal successors, (194106), 63417 states have internal predecessors, (194106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:19,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63418 states to 63418 states and 194106 transitions. [2021-03-10 21:26:19,432 INFO L78 Accepts]: Start accepts. Automaton has 63418 states and 194106 transitions. Word has length 22 [2021-03-10 21:26:19,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:19,432 INFO L480 AbstractCegarLoop]: Abstraction has 63418 states and 194106 transitions. [2021-03-10 21:26:19,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:19,432 INFO L276 IsEmpty]: Start isEmpty. Operand 63418 states and 194106 transitions. [2021-03-10 21:26:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:19,448 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:19,448 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:19,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10521 [2021-03-10 21:26:19,648 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:19,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:19,649 INFO L82 PathProgramCache]: Analyzing trace with hash -353147191, now seen corresponding path program 225 times [2021-03-10 21:26:19,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:19,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081761353] [2021-03-10 21:26:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:19,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081761353] [2021-03-10 21:26:19,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028558579] [2021-03-10 21:26:19,722 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 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 21:26:19,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:26:19,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:19,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:19,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:19,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:19,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:19,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837678081] [2021-03-10 21:26:19,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:19,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:19,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:19,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:19,795 INFO L87 Difference]: Start difference. First operand 63418 states and 194106 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:20,207 INFO L93 Difference]: Finished difference Result 75602 states and 230264 transitions. [2021-03-10 21:26:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:20,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:20,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:20,337 INFO L225 Difference]: With dead ends: 75602 [2021-03-10 21:26:20,337 INFO L226 Difference]: Without dead ends: 75602 [2021-03-10 21:26:20,337 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:26:20,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75602 states. [2021-03-10 21:26:21,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75602 to 53421. [2021-03-10 21:26:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53421 states, 53420 states have (on average 3.0645638337701238) internal successors, (163709), 53420 states have internal predecessors, (163709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:21,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53421 states to 53421 states and 163709 transitions. [2021-03-10 21:26:21,537 INFO L78 Accepts]: Start accepts. Automaton has 53421 states and 163709 transitions. Word has length 22 [2021-03-10 21:26:21,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:21,537 INFO L480 AbstractCegarLoop]: Abstraction has 53421 states and 163709 transitions. [2021-03-10 21:26:21,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 53421 states and 163709 transitions. [2021-03-10 21:26:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:21,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:21,551 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:21,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10522,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:21,752 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:21,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1620604369, now seen corresponding path program 226 times [2021-03-10 21:26:21,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:21,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998360385] [2021-03-10 21:26:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998360385] [2021-03-10 21:26:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598369784] [2021-03-10 21:26:21,821 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 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 21:26:21,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:21,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:21,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:21,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:21,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:21,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:21,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595046927] [2021-03-10 21:26:21,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:21,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:21,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:21,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:21,889 INFO L87 Difference]: Start difference. First operand 53421 states and 163709 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:22,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:22,589 INFO L93 Difference]: Finished difference Result 68985 states and 210204 transitions. [2021-03-10 21:26:22,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:26:22,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:22,701 INFO L225 Difference]: With dead ends: 68985 [2021-03-10 21:26:22,701 INFO L226 Difference]: Without dead ends: 68985 [2021-03-10 21:26:22,701 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=560, Invalid=1080, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:26:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68985 states. [2021-03-10 21:26:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68985 to 46695. [2021-03-10 21:26:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46695 states, 46694 states have (on average 3.0735426393112606) internal successors, (143516), 46694 states have internal predecessors, (143516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46695 states to 46695 states and 143516 transitions. [2021-03-10 21:26:23,709 INFO L78 Accepts]: Start accepts. Automaton has 46695 states and 143516 transitions. Word has length 22 [2021-03-10 21:26:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:23,709 INFO L480 AbstractCegarLoop]: Abstraction has 46695 states and 143516 transitions. [2021-03-10 21:26:23,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 46695 states and 143516 transitions. [2021-03-10 21:26:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:23,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:23,722 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:23,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10523,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:23,922 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:23,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:23,922 INFO L82 PathProgramCache]: Analyzing trace with hash 414428143, now seen corresponding path program 227 times [2021-03-10 21:26:23,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:23,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132578105] [2021-03-10 21:26:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:23,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132578105] [2021-03-10 21:26:23,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546045681] [2021-03-10 21:26:23,981 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 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 21:26:24,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:26:24,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:24,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:24,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:24,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:24,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:26:24,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612529963] [2021-03-10 21:26:24,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:24,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:24,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:24,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:24,045 INFO L87 Difference]: Start difference. First operand 46695 states and 143516 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:24,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:24,278 INFO L93 Difference]: Finished difference Result 49438 states and 151354 transitions. [2021-03-10 21:26:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:26:24,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:26:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:24,358 INFO L225 Difference]: With dead ends: 49438 [2021-03-10 21:26:24,358 INFO L226 Difference]: Without dead ends: 49438 [2021-03-10 21:26:24,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49438 states. [2021-03-10 21:26:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49438 to 36426. [2021-03-10 21:26:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36426 states, 36425 states have (on average 3.0824433768016473) internal successors, (112278), 36425 states have internal predecessors, (112278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36426 states to 36426 states and 112278 transitions. [2021-03-10 21:26:25,169 INFO L78 Accepts]: Start accepts. Automaton has 36426 states and 112278 transitions. Word has length 22 [2021-03-10 21:26:25,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:25,169 INFO L480 AbstractCegarLoop]: Abstraction has 36426 states and 112278 transitions. [2021-03-10 21:26:25,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:25,169 INFO L276 IsEmpty]: Start isEmpty. Operand 36426 states and 112278 transitions. [2021-03-10 21:26:25,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:25,178 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:25,178 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:25,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10524 [2021-03-10 21:26:25,378 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:25,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:25,379 INFO L82 PathProgramCache]: Analyzing trace with hash -91918123, now seen corresponding path program 228 times [2021-03-10 21:26:25,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:25,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171990674] [2021-03-10 21:26:25,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:25,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171990674] [2021-03-10 21:26:25,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15843012] [2021-03-10 21:26:25,444 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 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 21:26:25,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:25,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:25,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:25,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:25,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:25,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:26:25,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530598394] [2021-03-10 21:26:25,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:25,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:25,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:25,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:25,525 INFO L87 Difference]: Start difference. First operand 36426 states and 112278 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:25,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:25,698 INFO L93 Difference]: Finished difference Result 38526 states and 118284 transitions. [2021-03-10 21:26:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:26:25,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:26:25,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:25,752 INFO L225 Difference]: With dead ends: 38526 [2021-03-10 21:26:25,752 INFO L226 Difference]: Without dead ends: 38526 [2021-03-10 21:26:25,753 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:25,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38526 states. [2021-03-10 21:26:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38526 to 38139. [2021-03-10 21:26:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38139 states, 38138 states have (on average 3.0788976873459544) internal successors, (117423), 38138 states have internal predecessors, (117423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38139 states to 38139 states and 117423 transitions. [2021-03-10 21:26:26,485 INFO L78 Accepts]: Start accepts. Automaton has 38139 states and 117423 transitions. Word has length 22 [2021-03-10 21:26:26,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:26,485 INFO L480 AbstractCegarLoop]: Abstraction has 38139 states and 117423 transitions. [2021-03-10 21:26:26,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:26,485 INFO L276 IsEmpty]: Start isEmpty. Operand 38139 states and 117423 transitions. [2021-03-10 21:26:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:26,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:26,495 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:26,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10525,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:26,695 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1391216815, now seen corresponding path program 229 times [2021-03-10 21:26:26,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:26,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390717570] [2021-03-10 21:26:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:26,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390717570] [2021-03-10 21:26:26,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137087253] [2021-03-10 21:26:26,764 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 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 21:26:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:26,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:26,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:26,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:26,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:26,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044989080] [2021-03-10 21:26:26,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:26,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:26,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:26,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:26,828 INFO L87 Difference]: Start difference. First operand 38139 states and 117423 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:27,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:27,064 INFO L93 Difference]: Finished difference Result 38877 states and 119237 transitions. [2021-03-10 21:26:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:26:27,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:27,119 INFO L225 Difference]: With dead ends: 38877 [2021-03-10 21:26:27,119 INFO L226 Difference]: Without dead ends: 38877 [2021-03-10 21:26:27,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:26:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38877 states. [2021-03-10 21:26:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38877 to 37259. [2021-03-10 21:26:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37259 states, 37258 states have (on average 3.0800096623543936) internal successors, (114755), 37258 states have internal predecessors, (114755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37259 states to 37259 states and 114755 transitions. [2021-03-10 21:26:27,896 INFO L78 Accepts]: Start accepts. Automaton has 37259 states and 114755 transitions. Word has length 22 [2021-03-10 21:26:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:27,896 INFO L480 AbstractCegarLoop]: Abstraction has 37259 states and 114755 transitions. [2021-03-10 21:26:27,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 37259 states and 114755 transitions. [2021-03-10 21:26:27,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:27,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:27,906 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:28,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10526 [2021-03-10 21:26:28,106 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:28,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:28,106 INFO L82 PathProgramCache]: Analyzing trace with hash 123759637, now seen corresponding path program 230 times [2021-03-10 21:26:28,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:28,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151527857] [2021-03-10 21:26:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:28,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151527857] [2021-03-10 21:26:28,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027135289] [2021-03-10 21:26:28,178 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 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 21:26:28,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:28,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:28,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:28,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:28,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:28,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:28,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372598002] [2021-03-10 21:26:28,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:28,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:28,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:28,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:28,244 INFO L87 Difference]: Start difference. First operand 37259 states and 114755 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:28,555 INFO L93 Difference]: Finished difference Result 39004 states and 119600 transitions. [2021-03-10 21:26:28,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:28,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:28,609 INFO L225 Difference]: With dead ends: 39004 [2021-03-10 21:26:28,610 INFO L226 Difference]: Without dead ends: 39004 [2021-03-10 21:26:28,610 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:26:28,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39004 states. [2021-03-10 21:26:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39004 to 37661. [2021-03-10 21:26:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37661 states, 37660 states have (on average 3.0793414763674987) internal successors, (115968), 37660 states have internal predecessors, (115968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37661 states to 37661 states and 115968 transitions. [2021-03-10 21:26:29,350 INFO L78 Accepts]: Start accepts. Automaton has 37661 states and 115968 transitions. Word has length 22 [2021-03-10 21:26:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:29,351 INFO L480 AbstractCegarLoop]: Abstraction has 37661 states and 115968 transitions. [2021-03-10 21:26:29,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:29,351 INFO L276 IsEmpty]: Start isEmpty. Operand 37661 states and 115968 transitions. [2021-03-10 21:26:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:29,360 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:29,360 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:29,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10527,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:29,561 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:29,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:29,561 INFO L82 PathProgramCache]: Analyzing trace with hash -512707217, now seen corresponding path program 231 times [2021-03-10 21:26:29,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:29,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555416883] [2021-03-10 21:26:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:29,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555416883] [2021-03-10 21:26:29,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027264782] [2021-03-10 21:26:29,636 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 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 21:26:29,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:26:29,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:29,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:29,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:29,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:29,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:29,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942456543] [2021-03-10 21:26:29,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:29,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:29,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:29,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:29,709 INFO L87 Difference]: Start difference. First operand 37661 states and 115968 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:30,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:30,120 INFO L93 Difference]: Finished difference Result 39220 states and 120135 transitions. [2021-03-10 21:26:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:26:30,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:30,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:30,177 INFO L225 Difference]: With dead ends: 39220 [2021-03-10 21:26:30,177 INFO L226 Difference]: Without dead ends: 39220 [2021-03-10 21:26:30,177 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 295.9ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:26:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39220 states. [2021-03-10 21:26:30,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39220 to 37458. [2021-03-10 21:26:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.08011853592119) internal successors, (115372), 37457 states have internal predecessors, (115372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115372 transitions. [2021-03-10 21:26:30,947 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115372 transitions. Word has length 22 [2021-03-10 21:26:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:30,947 INFO L480 AbstractCegarLoop]: Abstraction has 37458 states and 115372 transitions. [2021-03-10 21:26:30,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115372 transitions. [2021-03-10 21:26:30,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:30,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:30,957 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:31,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10528 [2021-03-10 21:26:31,157 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:31,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2054510059, now seen corresponding path program 232 times [2021-03-10 21:26:31,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:31,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560942217] [2021-03-10 21:26:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:31,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560942217] [2021-03-10 21:26:31,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753549088] [2021-03-10 21:26:31,215 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 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 21:26:31,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:31,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:31,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:31,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:31,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:31,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711618953] [2021-03-10 21:26:31,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:31,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:31,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:31,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:31,280 INFO L87 Difference]: Start difference. First operand 37458 states and 115372 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21:26:31,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:31,556 INFO L93 Difference]: Finished difference Result 37627 states and 115565 transitions. [2021-03-10 21:26:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:31,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-03-10 21:26:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:31,612 INFO L225 Difference]: With dead ends: 37627 [2021-03-10 21:26:31,612 INFO L226 Difference]: Without dead ends: 37623 [2021-03-10 21:26:31,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:26:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37623 states. [2021-03-10 21:26:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37623 to 37458. [2021-03-10 21:26:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.0800117468030006) internal successors, (115368), 37457 states have internal predecessors, (115368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115368 transitions. [2021-03-10 21:26:32,434 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115368 transitions. Word has length 22 [2021-03-10 21:26:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:32,434 INFO L480 AbstractCegarLoop]: Abstraction has 37458 states and 115368 transitions. [2021-03-10 21:26:32,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21:26:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115368 transitions. [2021-03-10 21:26:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:32,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:32,444 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:32,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10529,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:32,644 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:32,644 INFO L82 PathProgramCache]: Analyzing trace with hash -324040043, now seen corresponding path program 233 times [2021-03-10 21:26:32,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:32,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049596649] [2021-03-10 21:26:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:32,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049596649] [2021-03-10 21:26:32,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483093302] [2021-03-10 21:26:32,716 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 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 21:26:32,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:26:32,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:32,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:32,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:32,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:32,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:32,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38986706] [2021-03-10 21:26:32,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:32,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:32,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:32,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:32,782 INFO L87 Difference]: Start difference. First operand 37458 states and 115368 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:33,138 INFO L93 Difference]: Finished difference Result 44126 states and 134929 transitions. [2021-03-10 21:26:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:26:33,139 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:33,203 INFO L225 Difference]: With dead ends: 44126 [2021-03-10 21:26:33,203 INFO L226 Difference]: Without dead ends: 44126 [2021-03-10 21:26:33,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:26:33,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44126 states. [2021-03-10 21:26:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44126 to 42198. [2021-03-10 21:26:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42198 states, 42197 states have (on average 3.0731331611251984) internal successors, (129677), 42197 states have internal predecessors, (129677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42198 states to 42198 states and 129677 transitions. [2021-03-10 21:26:34,028 INFO L78 Accepts]: Start accepts. Automaton has 42198 states and 129677 transitions. Word has length 22 [2021-03-10 21:26:34,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:34,028 INFO L480 AbstractCegarLoop]: Abstraction has 42198 states and 129677 transitions. [2021-03-10 21:26:34,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 42198 states and 129677 transitions. [2021-03-10 21:26:34,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:34,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:34,041 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:34,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10530 [2021-03-10 21:26:34,247 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:34,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:34,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1420323963, now seen corresponding path program 234 times [2021-03-10 21:26:34,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:34,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329677574] [2021-03-10 21:26:34,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:34,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329677574] [2021-03-10 21:26:34,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219134749] [2021-03-10 21:26:34,319 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 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 21:26:34,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:34,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:34,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:34,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:34,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:34,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836770483] [2021-03-10 21:26:34,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:34,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:34,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:34,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:34,383 INFO L87 Difference]: Start difference. First operand 42198 states and 129677 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:34,698 INFO L93 Difference]: Finished difference Result 46244 states and 141435 transitions. [2021-03-10 21:26:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:34,699 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:34,765 INFO L225 Difference]: With dead ends: 46244 [2021-03-10 21:26:34,765 INFO L226 Difference]: Without dead ends: 46244 [2021-03-10 21:26:34,765 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:26:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46244 states. [2021-03-10 21:26:35,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46244 to 45504. [2021-03-10 21:26:35,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45504 states, 45503 states have (on average 3.068566907676417) internal successors, (139629), 45503 states have internal predecessors, (139629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45504 states to 45504 states and 139629 transitions. [2021-03-10 21:26:35,584 INFO L78 Accepts]: Start accepts. Automaton has 45504 states and 139629 transitions. Word has length 22 [2021-03-10 21:26:35,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:35,584 INFO L480 AbstractCegarLoop]: Abstraction has 45504 states and 139629 transitions. [2021-03-10 21:26:35,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:35,584 INFO L276 IsEmpty]: Start isEmpty. Operand 45504 states and 139629 transitions. [2021-03-10 21:26:35,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:35,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:35,598 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:35,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10531 [2021-03-10 21:26:35,799 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:35,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:35,799 INFO L82 PathProgramCache]: Analyzing trace with hash 783857109, now seen corresponding path program 235 times [2021-03-10 21:26:35,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:35,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166275789] [2021-03-10 21:26:35,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:35,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166275789] [2021-03-10 21:26:35,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566961913] [2021-03-10 21:26:35,874 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 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 21:26:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:35,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:35,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:35,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:35,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:35,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150417792] [2021-03-10 21:26:35,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:35,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:35,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:35,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:35,938 INFO L87 Difference]: Start difference. First operand 45504 states and 139629 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:36,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:36,346 INFO L93 Difference]: Finished difference Result 47891 states and 146334 transitions. [2021-03-10 21:26:36,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:26:36,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:36,413 INFO L225 Difference]: With dead ends: 47891 [2021-03-10 21:26:36,413 INFO L226 Difference]: Without dead ends: 47891 [2021-03-10 21:26:36,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=614, Invalid=1192, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:26:36,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47891 states. [2021-03-10 21:26:37,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47891 to 46839. [2021-03-10 21:26:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46839 states, 46838 states have (on average 3.066612579529442) internal successors, (143634), 46838 states have internal predecessors, (143634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46839 states to 46839 states and 143634 transitions. [2021-03-10 21:26:37,309 INFO L78 Accepts]: Start accepts. Automaton has 46839 states and 143634 transitions. Word has length 22 [2021-03-10 21:26:37,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:37,309 INFO L480 AbstractCegarLoop]: Abstraction has 46839 states and 143634 transitions. [2021-03-10 21:26:37,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 46839 states and 143634 transitions. [2021-03-10 21:26:37,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:37,324 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:37,324 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:37,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10532 [2021-03-10 21:26:37,524 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:37,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1486004305, now seen corresponding path program 236 times [2021-03-10 21:26:37,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:37,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239880070] [2021-03-10 21:26:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:37,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239880070] [2021-03-10 21:26:37,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416099830] [2021-03-10 21:26:37,577 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 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 21:26:37,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:37,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:37,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:37,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:37,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:37,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:37,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848748856] [2021-03-10 21:26:37,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:37,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:37,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:37,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:37,632 INFO L87 Difference]: Start difference. First operand 46839 states and 143634 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:26:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:37,893 INFO L93 Difference]: Finished difference Result 47040 states and 143931 transitions. [2021-03-10 21:26:37,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:37,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:26:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:37,961 INFO L225 Difference]: With dead ends: 47040 [2021-03-10 21:26:37,961 INFO L226 Difference]: Without dead ends: 47036 [2021-03-10 21:26:37,961 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47036 states. [2021-03-10 21:26:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47036 to 46875. [2021-03-10 21:26:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46875 states, 46874 states have (on average 3.066646755130776) internal successors, (143746), 46874 states have internal predecessors, (143746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46875 states to 46875 states and 143746 transitions. [2021-03-10 21:26:38,871 INFO L78 Accepts]: Start accepts. Automaton has 46875 states and 143746 transitions. Word has length 22 [2021-03-10 21:26:38,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:38,871 INFO L480 AbstractCegarLoop]: Abstraction has 46875 states and 143746 transitions. [2021-03-10 21:26:38,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:26:38,871 INFO L276 IsEmpty]: Start isEmpty. Operand 46875 states and 143746 transitions. [2021-03-10 21:26:38,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:38,886 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:38,886 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:39,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10533,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:39,086 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:39,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:39,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1091213931, now seen corresponding path program 237 times [2021-03-10 21:26:39,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:39,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976687954] [2021-03-10 21:26:39,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:39,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976687954] [2021-03-10 21:26:39,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333571147] [2021-03-10 21:26:39,139 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 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 21:26:39,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:26:39,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:39,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:39,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:39,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:39,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:39,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975434166] [2021-03-10 21:26:39,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:39,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:39,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:39,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:39,200 INFO L87 Difference]: Start difference. First operand 46875 states and 143746 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:26:39,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:39,411 INFO L93 Difference]: Finished difference Result 47717 states and 145917 transitions. [2021-03-10 21:26:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:26:39,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 22 [2021-03-10 21:26:39,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:39,718 INFO L225 Difference]: With dead ends: 47717 [2021-03-10 21:26:39,718 INFO L226 Difference]: Without dead ends: 47717 [2021-03-10 21:26:39,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:26:39,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47717 states. [2021-03-10 21:26:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47717 to 46880. [2021-03-10 21:26:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46880 states, 46879 states have (on average 3.066639646750144) internal successors, (143761), 46879 states have internal predecessors, (143761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46880 states to 46880 states and 143761 transitions. [2021-03-10 21:26:40,318 INFO L78 Accepts]: Start accepts. Automaton has 46880 states and 143761 transitions. Word has length 22 [2021-03-10 21:26:40,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:40,319 INFO L480 AbstractCegarLoop]: Abstraction has 46880 states and 143761 transitions. [2021-03-10 21:26:40,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:26:40,319 INFO L276 IsEmpty]: Start isEmpty. Operand 46880 states and 143761 transitions. [2021-03-10 21:26:40,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:40,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:40,333 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:40,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10534 [2021-03-10 21:26:40,534 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:40,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:40,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1474706031, now seen corresponding path program 238 times [2021-03-10 21:26:40,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:40,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104977570] [2021-03-10 21:26:40,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:40,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104977570] [2021-03-10 21:26:40,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35664236] [2021-03-10 21:26:40,586 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 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 21:26:40,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:40,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:40,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:40,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:40,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:40,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:40,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246738806] [2021-03-10 21:26:40,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:40,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:40,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:40,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:40,649 INFO L87 Difference]: Start difference. First operand 46880 states and 143761 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:26:41,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:41,087 INFO L93 Difference]: Finished difference Result 48348 states and 147772 transitions. [2021-03-10 21:26:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:26:41,088 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:26:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:41,157 INFO L225 Difference]: With dead ends: 48348 [2021-03-10 21:26:41,157 INFO L226 Difference]: Without dead ends: 48348 [2021-03-10 21:26:41,157 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:26:41,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48348 states. [2021-03-10 21:26:41,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48348 to 46887. [2021-03-10 21:26:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46887 states, 46886 states have (on average 3.066608369236019) internal successors, (143781), 46886 states have internal predecessors, (143781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46887 states to 46887 states and 143781 transitions. [2021-03-10 21:26:42,117 INFO L78 Accepts]: Start accepts. Automaton has 46887 states and 143781 transitions. Word has length 22 [2021-03-10 21:26:42,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:42,117 INFO L480 AbstractCegarLoop]: Abstraction has 46887 states and 143781 transitions. [2021-03-10 21:26:42,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:26:42,118 INFO L276 IsEmpty]: Start isEmpty. Operand 46887 states and 143781 transitions. [2021-03-10 21:26:42,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:42,130 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:42,130 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:42,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10535 [2021-03-10 21:26:42,331 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:42,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:42,331 INFO L82 PathProgramCache]: Analyzing trace with hash -586153771, now seen corresponding path program 239 times [2021-03-10 21:26:42,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:42,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280318645] [2021-03-10 21:26:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:42,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280318645] [2021-03-10 21:26:42,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031173862] [2021-03-10 21:26:42,390 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 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 21:26:42,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:42,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:42,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:42,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:42,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:42,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:42,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478249168] [2021-03-10 21:26:42,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:42,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:42,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:42,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:42,461 INFO L87 Difference]: Start difference. First operand 46887 states and 143781 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:26:42,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:42,774 INFO L93 Difference]: Finished difference Result 64639 states and 196977 transitions. [2021-03-10 21:26:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:26:42,775 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-03-10 21:26:42,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:42,878 INFO L225 Difference]: With dead ends: 64639 [2021-03-10 21:26:42,878 INFO L226 Difference]: Without dead ends: 64639 [2021-03-10 21:26:42,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:42,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64639 states. [2021-03-10 21:26:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64639 to 61565. [2021-03-10 21:26:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61565 states, 61564 states have (on average 3.058508219089078) internal successors, (188294), 61564 states have internal predecessors, (188294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61565 states to 61565 states and 188294 transitions. [2021-03-10 21:26:43,974 INFO L78 Accepts]: Start accepts. Automaton has 61565 states and 188294 transitions. Word has length 22 [2021-03-10 21:26:43,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:43,974 INFO L480 AbstractCegarLoop]: Abstraction has 61565 states and 188294 transitions. [2021-03-10 21:26:43,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:26:43,975 INFO L276 IsEmpty]: Start isEmpty. Operand 61565 states and 188294 transitions. [2021-03-10 21:26:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:43,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:43,990 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:44,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10536,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:44,191 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:44,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:44,191 INFO L82 PathProgramCache]: Analyzing trace with hash -48298193, now seen corresponding path program 240 times [2021-03-10 21:26:44,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:44,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564351594] [2021-03-10 21:26:44,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:44,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564351594] [2021-03-10 21:26:44,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926806556] [2021-03-10 21:26:44,251 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 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 21:26:44,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:44,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:44,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:44,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:44,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:44,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:26:44,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150097838] [2021-03-10 21:26:44,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:44,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:44,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:44,315 INFO L87 Difference]: Start difference. First operand 61565 states and 188294 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:44,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:44,626 INFO L93 Difference]: Finished difference Result 64066 states and 195284 transitions. [2021-03-10 21:26:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:26:44,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:26:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:44,732 INFO L225 Difference]: With dead ends: 64066 [2021-03-10 21:26:44,732 INFO L226 Difference]: Without dead ends: 64066 [2021-03-10 21:26:44,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:26:44,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64066 states. [2021-03-10 21:26:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64066 to 61726. [2021-03-10 21:26:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61726 states, 61725 states have (on average 3.0580639935196436) internal successors, (188759), 61725 states have internal predecessors, (188759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61726 states to 61726 states and 188759 transitions. [2021-03-10 21:26:45,919 INFO L78 Accepts]: Start accepts. Automaton has 61726 states and 188759 transitions. Word has length 22 [2021-03-10 21:26:45,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:45,919 INFO L480 AbstractCegarLoop]: Abstraction has 61726 states and 188759 transitions. [2021-03-10 21:26:45,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 61726 states and 188759 transitions. [2021-03-10 21:26:45,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:45,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:45,935 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:46,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10537,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:46,136 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:46,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:46,136 INFO L82 PathProgramCache]: Analyzing trace with hash -554644459, now seen corresponding path program 241 times [2021-03-10 21:26:46,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:46,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961644630] [2021-03-10 21:26:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:46,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961644630] [2021-03-10 21:26:46,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65738987] [2021-03-10 21:26:46,483 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 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 21:26:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:46,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:46,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:46,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:46,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:26:46,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969293504] [2021-03-10 21:26:46,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:46,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:46,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:46,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:46,547 INFO L87 Difference]: Start difference. First operand 61726 states and 188759 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:46,856 INFO L93 Difference]: Finished difference Result 73057 states and 222493 transitions. [2021-03-10 21:26:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:26:46,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:26:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:46,975 INFO L225 Difference]: With dead ends: 73057 [2021-03-10 21:26:46,975 INFO L226 Difference]: Without dead ends: 73057 [2021-03-10 21:26:46,976 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:26:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73057 states. [2021-03-10 21:26:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73057 to 71622. [2021-03-10 21:26:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71622 states, 71621 states have (on average 3.051926111056813) internal successors, (218582), 71621 states have internal predecessors, (218582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71622 states to 71622 states and 218582 transitions. [2021-03-10 21:26:48,265 INFO L78 Accepts]: Start accepts. Automaton has 71622 states and 218582 transitions. Word has length 22 [2021-03-10 21:26:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:48,265 INFO L480 AbstractCegarLoop]: Abstraction has 71622 states and 218582 transitions. [2021-03-10 21:26:48,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 71622 states and 218582 transitions. [2021-03-10 21:26:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:48,283 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:48,283 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:48,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10538 [2021-03-10 21:26:48,483 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:48,484 INFO L82 PathProgramCache]: Analyzing trace with hash 928490479, now seen corresponding path program 242 times [2021-03-10 21:26:48,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:48,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977854139] [2021-03-10 21:26:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:48,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977854139] [2021-03-10 21:26:48,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240176364] [2021-03-10 21:26:48,549 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 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 21:26:48,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:48,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:48,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:48,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:48,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:48,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:26:48,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705827434] [2021-03-10 21:26:48,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:48,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:48,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:48,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:48,612 INFO L87 Difference]: Start difference. First operand 71622 states and 218582 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:48,927 INFO L93 Difference]: Finished difference Result 76219 states and 232111 transitions. [2021-03-10 21:26:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22 [2021-03-10 21:26:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:49,051 INFO L225 Difference]: With dead ends: 76219 [2021-03-10 21:26:49,051 INFO L226 Difference]: Without dead ends: 76219 [2021-03-10 21:26:49,052 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76219 states. [2021-03-10 21:26:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76219 to 75735. [2021-03-10 21:26:50,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75735 states, 75734 states have (on average 3.0491588982491353) internal successors, (230925), 75734 states have internal predecessors, (230925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75735 states to 75735 states and 230925 transitions. [2021-03-10 21:26:50,540 INFO L78 Accepts]: Start accepts. Automaton has 75735 states and 230925 transitions. Word has length 22 [2021-03-10 21:26:50,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:50,540 INFO L480 AbstractCegarLoop]: Abstraction has 75735 states and 230925 transitions. [2021-03-10 21:26:50,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:26:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 75735 states and 230925 transitions. [2021-03-10 21:26:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:50,561 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:50,561 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:50,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10539,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:50,761 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash -338966699, now seen corresponding path program 243 times [2021-03-10 21:26:50,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:50,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460133594] [2021-03-10 21:26:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:50,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460133594] [2021-03-10 21:26:50,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905979709] [2021-03-10 21:26:50,845 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 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 21:26:50,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:26:50,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:50,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:50,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:50,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:50,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:50,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785522126] [2021-03-10 21:26:50,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:50,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:50,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:50,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:50,912 INFO L87 Difference]: Start difference. First operand 75735 states and 230925 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:51,287 INFO L93 Difference]: Finished difference Result 76769 states and 233709 transitions. [2021-03-10 21:26:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:26:51,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:51,413 INFO L225 Difference]: With dead ends: 76769 [2021-03-10 21:26:51,413 INFO L226 Difference]: Without dead ends: 76769 [2021-03-10 21:26:51,414 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:26:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76769 states. [2021-03-10 21:26:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76769 to 75772. [2021-03-10 21:26:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75772 states, 75771 states have (on average 3.0491348932969076) internal successors, (231036), 75771 states have internal predecessors, (231036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75772 states to 75772 states and 231036 transitions. [2021-03-10 21:26:53,156 INFO L78 Accepts]: Start accepts. Automaton has 75772 states and 231036 transitions. Word has length 22 [2021-03-10 21:26:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:53,156 INFO L480 AbstractCegarLoop]: Abstraction has 75772 states and 231036 transitions. [2021-03-10 21:26:53,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 75772 states and 231036 transitions. [2021-03-10 21:26:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:53,173 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:53,173 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:53,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10540 [2021-03-10 21:26:53,374 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:53,374 INFO L82 PathProgramCache]: Analyzing trace with hash -975433553, now seen corresponding path program 244 times [2021-03-10 21:26:53,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:53,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266409741] [2021-03-10 21:26:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:53,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266409741] [2021-03-10 21:26:53,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825999228] [2021-03-10 21:26:53,451 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 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 21:26:53,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:53,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:53,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:53,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:53,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:53,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:53,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264078147] [2021-03-10 21:26:53,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:53,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:53,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:53,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:53,517 INFO L87 Difference]: Start difference. First operand 75772 states and 231036 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:53,968 INFO L93 Difference]: Finished difference Result 77589 states and 236129 transitions. [2021-03-10 21:26:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:26:53,969 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:54,101 INFO L225 Difference]: With dead ends: 77589 [2021-03-10 21:26:54,101 INFO L226 Difference]: Without dead ends: 77589 [2021-03-10 21:26:54,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:26:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-03-10 21:26:55,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 76898. [2021-03-10 21:26:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76898 states, 76897 states have (on average 3.048415412824948) internal successors, (234414), 76897 states have internal predecessors, (234414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:55,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76898 states to 76898 states and 234414 transitions. [2021-03-10 21:26:55,469 INFO L78 Accepts]: Start accepts. Automaton has 76898 states and 234414 transitions. Word has length 22 [2021-03-10 21:26:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:55,470 INFO L480 AbstractCegarLoop]: Abstraction has 76898 states and 234414 transitions. [2021-03-10 21:26:55,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 76898 states and 234414 transitions. [2021-03-10 21:26:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:55,489 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:55,489 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:55,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10541,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:55,689 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:55,690 INFO L82 PathProgramCache]: Analyzing trace with hash 768930453, now seen corresponding path program 245 times [2021-03-10 21:26:55,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:55,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731303225] [2021-03-10 21:26:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:55,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731303225] [2021-03-10 21:26:55,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934424173] [2021-03-10 21:26:55,774 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 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 21:26:56,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:56,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:56,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:56,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:56,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:56,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:56,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428572548] [2021-03-10 21:26:56,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:56,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:56,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:56,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:56,075 INFO L87 Difference]: Start difference. First operand 76898 states and 234414 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:56,679 INFO L93 Difference]: Finished difference Result 78959 states and 240117 transitions. [2021-03-10 21:26:56,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:26:56,680 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-03-10 21:26:56,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:56,808 INFO L225 Difference]: With dead ends: 78959 [2021-03-10 21:26:56,808 INFO L226 Difference]: Without dead ends: 78959 [2021-03-10 21:26:56,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:26:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78959 states. [2021-03-10 21:26:57,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78959 to 77340. [2021-03-10 21:26:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77340 states, 77339 states have (on average 3.048138713973545) internal successors, (235740), 77339 states have internal predecessors, (235740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:58,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77340 states to 77340 states and 235740 transitions. [2021-03-10 21:26:58,193 INFO L78 Accepts]: Start accepts. Automaton has 77340 states and 235740 transitions. Word has length 22 [2021-03-10 21:26:58,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:58,193 INFO L480 AbstractCegarLoop]: Abstraction has 77340 states and 235740 transitions. [2021-03-10 21:26:58,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 21:26:58,193 INFO L276 IsEmpty]: Start isEmpty. Operand 77340 states and 235740 transitions. [2021-03-10 21:26:58,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:26:58,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:58,213 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:58,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10542 [2021-03-10 21:26:58,413 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:58,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:58,414 INFO L82 PathProgramCache]: Analyzing trace with hash -928937975, now seen corresponding path program 246 times [2021-03-10 21:26:58,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:58,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631157711] [2021-03-10 21:26:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:58,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631157711] [2021-03-10 21:26:58,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272926071] [2021-03-10 21:26:58,502 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 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 21:26:58,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:26:58,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:58,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:58,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:58,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:58,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-03-10 21:26:58,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674469491] [2021-03-10 21:26:58,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:58,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:58,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:58,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:58,564 INFO L87 Difference]: Start difference. First operand 77340 states and 235740 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:26:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:59,221 INFO L93 Difference]: Finished difference Result 77569 states and 236048 transitions. [2021-03-10 21:26:59,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:26:59,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 22 [2021-03-10 21:26:59,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:59,349 INFO L225 Difference]: With dead ends: 77569 [2021-03-10 21:26:59,349 INFO L226 Difference]: Without dead ends: 77563 [2021-03-10 21:26:59,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:26:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77563 states. [2021-03-10 21:27:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77563 to 77255. [2021-03-10 21:27:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77255 states, 77254 states have (on average 3.0479198488104178) internal successors, (235464), 77254 states have internal predecessors, (235464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77255 states to 77255 states and 235464 transitions. [2021-03-10 21:27:00,727 INFO L78 Accepts]: Start accepts. Automaton has 77255 states and 235464 transitions. Word has length 22 [2021-03-10 21:27:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:00,727 INFO L480 AbstractCegarLoop]: Abstraction has 77255 states and 235464 transitions. [2021-03-10 21:27:00,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:27:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 77255 states and 235464 transitions. [2021-03-10 21:27:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:00,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:00,748 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:00,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10543,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:00,951 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:00,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:00,951 INFO L82 PathProgramCache]: Analyzing trace with hash -879550451, now seen corresponding path program 247 times [2021-03-10 21:27:00,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:00,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644072138] [2021-03-10 21:27:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:01,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644072138] [2021-03-10 21:27:01,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678855849] [2021-03-10 21:27:01,024 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 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 21:27:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:01,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:01,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:01,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:01,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-03-10 21:27:01,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78926691] [2021-03-10 21:27:01,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:27:01,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:01,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:27:01,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:27:01,099 INFO L87 Difference]: Start difference. First operand 77255 states and 235464 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:27:01,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:01,968 INFO L93 Difference]: Finished difference Result 105545 states and 320390 transitions. [2021-03-10 21:27:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:27:01,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 22 [2021-03-10 21:27:01,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:02,175 INFO L225 Difference]: With dead ends: 105545 [2021-03-10 21:27:02,175 INFO L226 Difference]: Without dead ends: 105545 [2021-03-10 21:27:02,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:27:02,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105545 states. [2021-03-10 21:27:03,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105545 to 103725. [2021-03-10 21:27:03,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103725 states, 103724 states have (on average 3.03849639427712) internal successors, (315165), 103724 states have internal predecessors, (315165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:03,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103725 states to 103725 states and 315165 transitions. [2021-03-10 21:27:03,943 INFO L78 Accepts]: Start accepts. Automaton has 103725 states and 315165 transitions. Word has length 22 [2021-03-10 21:27:03,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:03,944 INFO L480 AbstractCegarLoop]: Abstraction has 103725 states and 315165 transitions. [2021-03-10 21:27:03,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:27:03,944 INFO L276 IsEmpty]: Start isEmpty. Operand 103725 states and 315165 transitions. [2021-03-10 21:27:03,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:03,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:03,971 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:04,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10544 [2021-03-10 21:27:04,172 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:04,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:04,172 INFO L82 PathProgramCache]: Analyzing trace with hash 603584487, now seen corresponding path program 248 times [2021-03-10 21:27:04,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:04,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416168790] [2021-03-10 21:27:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:04,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416168790] [2021-03-10 21:27:04,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777479946] [2021-03-10 21:27:04,250 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 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 21:27:04,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:04,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:04,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:04,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:04,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:04,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 21:27:04,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090661750] [2021-03-10 21:27:04,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:27:04,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:04,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:27:04,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:04,323 INFO L87 Difference]: Start difference. First operand 103725 states and 315165 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:04,703 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:27:05,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:05,224 INFO L93 Difference]: Finished difference Result 114469 states and 347083 transitions. [2021-03-10 21:27:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:27:05,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-03-10 21:27:05,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:05,446 INFO L225 Difference]: With dead ends: 114469 [2021-03-10 21:27:05,447 INFO L226 Difference]: Without dead ends: 114469 [2021-03-10 21:27:05,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 548.7ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:27:05,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114469 states. [2021-03-10 21:27:07,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114469 to 89851. [2021-03-10 21:27:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89851 states, 89850 states have (on average 3.041469115191987) internal successors, (273276), 89850 states have internal predecessors, (273276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89851 states to 89851 states and 273276 transitions. [2021-03-10 21:27:07,489 INFO L78 Accepts]: Start accepts. Automaton has 89851 states and 273276 transitions. Word has length 22 [2021-03-10 21:27:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:07,489 INFO L480 AbstractCegarLoop]: Abstraction has 89851 states and 273276 transitions. [2021-03-10 21:27:07,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 89851 states and 273276 transitions. [2021-03-10 21:27:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:07,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:07,512 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:07,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10545 [2021-03-10 21:27:07,712 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:07,713 INFO L82 PathProgramCache]: Analyzing trace with hash -663872691, now seen corresponding path program 249 times [2021-03-10 21:27:07,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:07,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054818028] [2021-03-10 21:27:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:07,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054818028] [2021-03-10 21:27:07,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428137353] [2021-03-10 21:27:07,796 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 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 21:27:07,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:07,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:07,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:07,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:07,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 21:27:07,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033570430] [2021-03-10 21:27:07,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:27:07,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:07,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:27:07,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:07,872 INFO L87 Difference]: Start difference. First operand 89851 states and 273276 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:08,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:08,548 INFO L93 Difference]: Finished difference Result 104983 states and 318293 transitions. [2021-03-10 21:27:08,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:27:08,549 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-03-10 21:27:08,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:08,745 INFO L225 Difference]: With dead ends: 104983 [2021-03-10 21:27:08,746 INFO L226 Difference]: Without dead ends: 104983 [2021-03-10 21:27:08,746 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 328.3ms TimeCoverageRelationStatistics Valid=732, Invalid=1430, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:27:08,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104983 states. [2021-03-10 21:27:10,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104983 to 90067. [2021-03-10 21:27:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90067 states, 90066 states have (on average 3.0419581196011816) internal successors, (273977), 90066 states have internal predecessors, (273977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90067 states to 90067 states and 273977 transitions. [2021-03-10 21:27:10,721 INFO L78 Accepts]: Start accepts. Automaton has 90067 states and 273977 transitions. Word has length 22 [2021-03-10 21:27:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:10,721 INFO L480 AbstractCegarLoop]: Abstraction has 90067 states and 273977 transitions. [2021-03-10 21:27:10,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 90067 states and 273977 transitions. [2021-03-10 21:27:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:10,742 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:10,742 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:10,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10546 [2021-03-10 21:27:10,947 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:10,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:10,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1300339545, now seen corresponding path program 250 times [2021-03-10 21:27:10,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:10,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445582218] [2021-03-10 21:27:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:11,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445582218] [2021-03-10 21:27:11,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761518320] [2021-03-10 21:27:11,034 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 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 21:27:11,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:11,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:11,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:11,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:11,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:11,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 21:27:11,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103486161] [2021-03-10 21:27:11,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:27:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:27:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:11,109 INFO L87 Difference]: Start difference. First operand 90067 states and 273977 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:11,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:11,891 INFO L93 Difference]: Finished difference Result 104672 states and 317280 transitions. [2021-03-10 21:27:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:27:11,892 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-03-10 21:27:11,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:12,092 INFO L225 Difference]: With dead ends: 104672 [2021-03-10 21:27:12,092 INFO L226 Difference]: Without dead ends: 104672 [2021-03-10 21:27:12,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:27:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104672 states. [2021-03-10 21:27:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104672 to 90821. [2021-03-10 21:27:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90821 states, 90820 states have (on average 3.041995155252147) internal successors, (276274), 90820 states have internal predecessors, (276274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90821 states to 90821 states and 276274 transitions. [2021-03-10 21:27:14,107 INFO L78 Accepts]: Start accepts. Automaton has 90821 states and 276274 transitions. Word has length 22 [2021-03-10 21:27:14,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:14,108 INFO L480 AbstractCegarLoop]: Abstraction has 90821 states and 276274 transitions. [2021-03-10 21:27:14,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 90821 states and 276274 transitions. [2021-03-10 21:27:14,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:14,130 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:14,130 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:14,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10547 [2021-03-10 21:27:14,330 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:14,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:14,331 INFO L82 PathProgramCache]: Analyzing trace with hash 632691635, now seen corresponding path program 251 times [2021-03-10 21:27:14,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:14,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097962669] [2021-03-10 21:27:14,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:14,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097962669] [2021-03-10 21:27:14,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687018778] [2021-03-10 21:27:14,411 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:14,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:27:14,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:14,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:14,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:14,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:14,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 21:27:14,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009827464] [2021-03-10 21:27:14,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:27:14,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:14,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:27:14,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:14,487 INFO L87 Difference]: Start difference. First operand 90821 states and 276274 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:15,410 INFO L93 Difference]: Finished difference Result 105621 states and 320343 transitions. [2021-03-10 21:27:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:27:15,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-03-10 21:27:15,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:15,596 INFO L225 Difference]: With dead ends: 105621 [2021-03-10 21:27:15,596 INFO L226 Difference]: Without dead ends: 105621 [2021-03-10 21:27:15,596 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=670, Invalid=1310, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:27:15,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105621 states. [2021-03-10 21:27:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105621 to 87948. [2021-03-10 21:27:17,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87948 states, 87947 states have (on average 3.0435716965899915) internal successors, (267673), 87947 states have internal predecessors, (267673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87948 states to 87948 states and 267673 transitions. [2021-03-10 21:27:17,309 INFO L78 Accepts]: Start accepts. Automaton has 87948 states and 267673 transitions. Word has length 22 [2021-03-10 21:27:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:17,309 INFO L480 AbstractCegarLoop]: Abstraction has 87948 states and 267673 transitions. [2021-03-10 21:27:17,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 87948 states and 267673 transitions. [2021-03-10 21:27:17,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:17,332 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:17,332 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:17,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10548,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:17,534 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:17,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:17,534 INFO L82 PathProgramCache]: Analyzing trace with hash -3775219, now seen corresponding path program 252 times [2021-03-10 21:27:17,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:17,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107269431] [2021-03-10 21:27:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:17,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107269431] [2021-03-10 21:27:17,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892514269] [2021-03-10 21:27:17,619 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:17,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:27:17,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:17,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:17,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:17,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:17,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 21:27:17,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207858868] [2021-03-10 21:27:17,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:27:17,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:17,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:27:17,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:17,695 INFO L87 Difference]: Start difference. First operand 87948 states and 267673 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:18,024 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 21:27:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:18,693 INFO L93 Difference]: Finished difference Result 96355 states and 292373 transitions. [2021-03-10 21:27:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:27:18,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-03-10 21:27:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:18,864 INFO L225 Difference]: With dead ends: 96355 [2021-03-10 21:27:18,864 INFO L226 Difference]: Without dead ends: 96355 [2021-03-10 21:27:18,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 682.3ms TimeCoverageRelationStatistics Valid=929, Invalid=1827, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:27:18,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96355 states. [2021-03-10 21:27:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96355 to 89848. [2021-03-10 21:27:20,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89848 states, 89847 states have (on average 3.042728193484479) internal successors, (273380), 89847 states have internal predecessors, (273380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89848 states to 89848 states and 273380 transitions. [2021-03-10 21:27:20,872 INFO L78 Accepts]: Start accepts. Automaton has 89848 states and 273380 transitions. Word has length 22 [2021-03-10 21:27:20,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:20,872 INFO L480 AbstractCegarLoop]: Abstraction has 89848 states and 273380 transitions. [2021-03-10 21:27:20,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:20,873 INFO L276 IsEmpty]: Start isEmpty. Operand 89848 states and 273380 transitions. [2021-03-10 21:27:20,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:20,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:20,898 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:21,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10549,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:21,099 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:21,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:21,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1342276787, now seen corresponding path program 253 times [2021-03-10 21:27:21,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:21,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152623134] [2021-03-10 21:27:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:21,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152623134] [2021-03-10 21:27:21,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242395527] [2021-03-10 21:27:21,170 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:21,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:21,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:21,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:21,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-03-10 21:27:21,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623951709] [2021-03-10 21:27:21,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:27:21,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:21,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:27:21,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:27:21,245 INFO L87 Difference]: Start difference. First operand 89848 states and 273380 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:27:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:21,736 INFO L93 Difference]: Finished difference Result 91563 states and 278140 transitions. [2021-03-10 21:27:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:27:21,737 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 22 [2021-03-10 21:27:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:21,891 INFO L225 Difference]: With dead ends: 91563 [2021-03-10 21:27:21,891 INFO L226 Difference]: Without dead ends: 91563 [2021-03-10 21:27:21,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:27:21,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91563 states. [2021-03-10 21:27:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91563 to 85666. [2021-03-10 21:27:23,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85666 states, 85665 states have (on average 3.044347166287282) internal successors, (260794), 85665 states have internal predecessors, (260794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85666 states to 85666 states and 260794 transitions. [2021-03-10 21:27:23,731 INFO L78 Accepts]: Start accepts. Automaton has 85666 states and 260794 transitions. Word has length 22 [2021-03-10 21:27:23,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:23,731 INFO L480 AbstractCegarLoop]: Abstraction has 85666 states and 260794 transitions. [2021-03-10 21:27:23,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:27:23,731 INFO L276 IsEmpty]: Start isEmpty. Operand 85666 states and 260794 transitions. [2021-03-10 21:27:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:23,752 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:23,752 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:23,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10550 [2021-03-10 21:27:23,953 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:23,953 INFO L82 PathProgramCache]: Analyzing trace with hash 140858151, now seen corresponding path program 254 times [2021-03-10 21:27:23,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:23,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451582231] [2021-03-10 21:27:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:24,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451582231] [2021-03-10 21:27:24,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540853830] [2021-03-10 21:27:24,026 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:24,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:24,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:24,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:24,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:24,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:24,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-03-10 21:27:24,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377934573] [2021-03-10 21:27:24,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:27:24,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:24,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:27:24,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:27:24,105 INFO L87 Difference]: Start difference. First operand 85666 states and 260794 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:27:24,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:24,568 INFO L93 Difference]: Finished difference Result 90021 states and 273590 transitions. [2021-03-10 21:27:24,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:27:24,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 22 [2021-03-10 21:27:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:24,715 INFO L225 Difference]: With dead ends: 90021 [2021-03-10 21:27:24,715 INFO L226 Difference]: Without dead ends: 90021 [2021-03-10 21:27:24,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:27:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90021 states. [2021-03-10 21:27:26,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90021 to 89587. [2021-03-10 21:27:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89587 states, 89586 states have (on average 3.0424173419954013) internal successors, (272558), 89586 states have internal predecessors, (272558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89587 states to 89587 states and 272558 transitions. [2021-03-10 21:27:26,586 INFO L78 Accepts]: Start accepts. Automaton has 89587 states and 272558 transitions. Word has length 22 [2021-03-10 21:27:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:26,586 INFO L480 AbstractCegarLoop]: Abstraction has 89587 states and 272558 transitions. [2021-03-10 21:27:26,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:27:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 89587 states and 272558 transitions. [2021-03-10 21:27:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:26,607 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:26,607 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:26,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10551,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:26,807 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:26,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1126599027, now seen corresponding path program 255 times [2021-03-10 21:27:26,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:26,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184136133] [2021-03-10 21:27:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:26,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184136133] [2021-03-10 21:27:26,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213739967] [2021-03-10 21:27:26,889 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:26,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:26,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:26,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:26,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:26,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:26,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 21:27:26,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815447624] [2021-03-10 21:27:26,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:27:26,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:26,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:27:26,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:26,971 INFO L87 Difference]: Start difference. First operand 89587 states and 272558 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:27,550 INFO L93 Difference]: Finished difference Result 91085 states and 276674 transitions. [2021-03-10 21:27:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:27:27,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-03-10 21:27:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:27,703 INFO L225 Difference]: With dead ends: 91085 [2021-03-10 21:27:27,703 INFO L226 Difference]: Without dead ends: 91085 [2021-03-10 21:27:27,703 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 282.0ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:27:27,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91085 states. [2021-03-10 21:27:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91085 to 87184. [2021-03-10 21:27:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87184 states, 87183 states have (on average 3.043563538763291) internal successors, (265347), 87183 states have internal predecessors, (265347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87184 states to 87184 states and 265347 transitions. [2021-03-10 21:27:29,561 INFO L78 Accepts]: Start accepts. Automaton has 87184 states and 265347 transitions. Word has length 22 [2021-03-10 21:27:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:29,561 INFO L480 AbstractCegarLoop]: Abstraction has 87184 states and 265347 transitions. [2021-03-10 21:27:29,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 87184 states and 265347 transitions. [2021-03-10 21:27:29,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:29,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:29,583 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:29,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10552 [2021-03-10 21:27:29,787 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:29,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1763065881, now seen corresponding path program 256 times [2021-03-10 21:27:29,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:29,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82791954] [2021-03-10 21:27:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:29,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82791954] [2021-03-10 21:27:29,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284509956] [2021-03-10 21:27:29,883 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:29,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:29,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:29,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:29,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:29,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:29,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 21:27:29,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899008225] [2021-03-10 21:27:29,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:27:29,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:29,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:27:29,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:29,958 INFO L87 Difference]: Start difference. First operand 87184 states and 265347 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:30,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:30,597 INFO L93 Difference]: Finished difference Result 89148 states and 270843 transitions. [2021-03-10 21:27:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:27:30,597 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-03-10 21:27:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:30,743 INFO L225 Difference]: With dead ends: 89148 [2021-03-10 21:27:30,743 INFO L226 Difference]: Without dead ends: 89148 [2021-03-10 21:27:30,744 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 372.4ms TimeCoverageRelationStatistics Valid=790, Invalid=1562, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:27:30,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89148 states. [2021-03-10 21:27:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89148 to 87528. [2021-03-10 21:27:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87528 states, 87527 states have (on average 3.0433923246541066) internal successors, (266379), 87527 states have internal predecessors, (266379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:32,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87528 states to 87528 states and 266379 transitions. [2021-03-10 21:27:32,613 INFO L78 Accepts]: Start accepts. Automaton has 87528 states and 266379 transitions. Word has length 22 [2021-03-10 21:27:32,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:32,613 INFO L480 AbstractCegarLoop]: Abstraction has 87528 states and 266379 transitions. [2021-03-10 21:27:32,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:32,613 INFO L276 IsEmpty]: Start isEmpty. Operand 87528 states and 266379 transitions. [2021-03-10 21:27:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:32,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:32,635 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:32,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10553 [2021-03-10 21:27:32,843 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:32,843 INFO L82 PathProgramCache]: Analyzing trace with hash -18701875, now seen corresponding path program 257 times [2021-03-10 21:27:32,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:32,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276342547] [2021-03-10 21:27:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:32,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276342547] [2021-03-10 21:27:32,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081968387] [2021-03-10 21:27:32,935 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:32,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:27:32,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:32,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:32,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:33,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:33,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 21:27:33,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126926678] [2021-03-10 21:27:33,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:27:33,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:33,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:27:33,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:33,012 INFO L87 Difference]: Start difference. First operand 87528 states and 266379 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:33,663 INFO L93 Difference]: Finished difference Result 89118 states and 270691 transitions. [2021-03-10 21:27:33,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:27:33,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-03-10 21:27:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:33,816 INFO L225 Difference]: With dead ends: 89118 [2021-03-10 21:27:33,816 INFO L226 Difference]: Without dead ends: 89118 [2021-03-10 21:27:33,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 386.1ms TimeCoverageRelationStatistics Valid=807, Invalid=1643, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:27:33,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89118 states. [2021-03-10 21:27:35,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89118 to 87510. [2021-03-10 21:27:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87510 states, 87509 states have (on average 3.043401250157127) internal successors, (266325), 87509 states have internal predecessors, (266325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87510 states to 87510 states and 266325 transitions. [2021-03-10 21:27:35,586 INFO L78 Accepts]: Start accepts. Automaton has 87510 states and 266325 transitions. Word has length 22 [2021-03-10 21:27:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:35,586 INFO L480 AbstractCegarLoop]: Abstraction has 87510 states and 266325 transitions. [2021-03-10 21:27:35,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:27:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 87510 states and 266325 transitions. [2021-03-10 21:27:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:35,608 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:35,608 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:35,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10554 [2021-03-10 21:27:35,808 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:35,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1303353945, now seen corresponding path program 258 times [2021-03-10 21:27:35,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:35,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140363362] [2021-03-10 21:27:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:35,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140363362] [2021-03-10 21:27:35,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023594122] [2021-03-10 21:27:35,904 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:35,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:27:35,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:35,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:35,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:35,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:35,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-03-10 21:27:35,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890309620] [2021-03-10 21:27:35,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:27:35,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:35,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:27:35,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:27:35,966 INFO L87 Difference]: Start difference. First operand 87510 states and 266325 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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 21:27:36,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:36,458 INFO L93 Difference]: Finished difference Result 87690 states and 266541 transitions. [2021-03-10 21:27:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:27:36,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 22 [2021-03-10 21:27:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:36,605 INFO L225 Difference]: With dead ends: 87690 [2021-03-10 21:27:36,605 INFO L226 Difference]: Without dead ends: 87686 [2021-03-10 21:27:36,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=313, Invalid=617, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:27:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87686 states. [2021-03-10 21:27:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87686 to 87508. [2021-03-10 21:27:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87508 states, 87507 states have (on average 3.0434250974207777) internal successors, (266321), 87507 states have internal predecessors, (266321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:38,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87508 states to 87508 states and 266321 transitions. [2021-03-10 21:27:38,471 INFO L78 Accepts]: Start accepts. Automaton has 87508 states and 266321 transitions. Word has length 22 [2021-03-10 21:27:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:38,471 INFO L480 AbstractCegarLoop]: Abstraction has 87508 states and 266321 transitions. [2021-03-10 21:27:38,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:27:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 87508 states and 266321 transitions. [2021-03-10 21:27:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:38,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:38,492 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:38,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10555,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:38,692 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:38,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:38,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1535013223, now seen corresponding path program 259 times [2021-03-10 21:27:38,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:38,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828914002] [2021-03-10 21:27:38,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:38,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828914002] [2021-03-10 21:27:38,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228003008] [2021-03-10 21:27:38,783 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:38,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:38,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:38,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:38,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-03-10 21:27:38,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153300436] [2021-03-10 21:27:38,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:27:38,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:38,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:27:38,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:27:38,866 INFO L87 Difference]: Start difference. First operand 87508 states and 266321 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 21:27:39,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:39,543 INFO L93 Difference]: Finished difference Result 97092 states and 294572 transitions. [2021-03-10 21:27:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:27:39,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 22 [2021-03-10 21:27:39,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:39,712 INFO L225 Difference]: With dead ends: 97092 [2021-03-10 21:27:39,712 INFO L226 Difference]: Without dead ends: 97092 [2021-03-10 21:27:39,712 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 380.5ms TimeCoverageRelationStatistics Valid=799, Invalid=1651, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:27:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97092 states. [2021-03-10 21:27:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97092 to 93336. [2021-03-10 21:27:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93336 states, 93335 states have (on average 3.0407457009696257) internal successors, (283808), 93335 states have internal predecessors, (283808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93336 states to 93336 states and 283808 transitions. [2021-03-10 21:27:41,694 INFO L78 Accepts]: Start accepts. Automaton has 93336 states and 283808 transitions. Word has length 22 [2021-03-10 21:27:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:41,694 INFO L480 AbstractCegarLoop]: Abstraction has 93336 states and 283808 transitions. [2021-03-10 21:27:41,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 21:27:41,694 INFO L276 IsEmpty]: Start isEmpty. Operand 93336 states and 283808 transitions. [2021-03-10 21:27:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:41,721 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:41,721 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:41,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10556 [2021-03-10 21:27:41,922 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:41,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:41,922 INFO L82 PathProgramCache]: Analyzing trace with hash -224277439, now seen corresponding path program 260 times [2021-03-10 21:27:41,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:41,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255536094] [2021-03-10 21:27:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:42,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255536094] [2021-03-10 21:27:42,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108283063] [2021-03-10 21:27:42,009 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:42,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:42,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:42,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:42,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:42,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:42,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-03-10 21:27:42,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502804909] [2021-03-10 21:27:42,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:27:42,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:42,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:27:42,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:27:42,093 INFO L87 Difference]: Start difference. First operand 93336 states and 283808 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 21:27:42,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:42,726 INFO L93 Difference]: Finished difference Result 97575 states and 296111 transitions. [2021-03-10 21:27:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:27:42,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 22 [2021-03-10 21:27:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:43,232 INFO L225 Difference]: With dead ends: 97575 [2021-03-10 21:27:43,232 INFO L226 Difference]: Without dead ends: 97575 [2021-03-10 21:27:43,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 346.1ms TimeCoverageRelationStatistics Valid=669, Invalid=1401, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:27:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97575 states. [2021-03-10 21:27:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97575 to 96000. [2021-03-10 21:27:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96000 states, 95999 states have (on average 3.0396149959895418) internal successors, (291800), 95999 states have internal predecessors, (291800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:44,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96000 states to 96000 states and 291800 transitions. [2021-03-10 21:27:44,877 INFO L78 Accepts]: Start accepts. Automaton has 96000 states and 291800 transitions. Word has length 22 [2021-03-10 21:27:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:44,877 INFO L480 AbstractCegarLoop]: Abstraction has 96000 states and 291800 transitions. [2021-03-10 21:27:44,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 21:27:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 96000 states and 291800 transitions. [2021-03-10 21:27:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:44,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:44,905 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:45,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10557,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:45,106 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:45,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1520086567, now seen corresponding path program 261 times [2021-03-10 21:27:45,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:45,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300415949] [2021-03-10 21:27:45,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:45,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300415949] [2021-03-10 21:27:45,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431115196] [2021-03-10 21:27:45,199 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:45,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:45,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:45,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:45,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:45,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:45,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-03-10 21:27:45,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077707141] [2021-03-10 21:27:45,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:27:45,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:45,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:27:45,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:27:45,284 INFO L87 Difference]: Start difference. First operand 96000 states and 291800 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 21:27:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:46,229 INFO L93 Difference]: Finished difference Result 98465 states and 298743 transitions. [2021-03-10 21:27:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:27:46,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 22 [2021-03-10 21:27:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:46,412 INFO L225 Difference]: With dead ends: 98465 [2021-03-10 21:27:46,412 INFO L226 Difference]: Without dead ends: 98465 [2021-03-10 21:27:46,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 360.7ms TimeCoverageRelationStatistics Valid=691, Invalid=1471, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:27:46,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98465 states. [2021-03-10 21:27:47,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98465 to 96553. [2021-03-10 21:27:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96553 states, 96552 states have (on average 3.0393881017482807) internal successors, (293459), 96552 states have internal predecessors, (293459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96553 states to 96553 states and 293459 transitions. [2021-03-10 21:27:48,128 INFO L78 Accepts]: Start accepts. Automaton has 96553 states and 293459 transitions. Word has length 22 [2021-03-10 21:27:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:48,128 INFO L480 AbstractCegarLoop]: Abstraction has 96553 states and 293459 transitions. [2021-03-10 21:27:48,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 21:27:48,128 INFO L276 IsEmpty]: Start isEmpty. Operand 96553 states and 293459 transitions. [2021-03-10 21:27:48,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:48,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:48,158 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:48,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10558,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:48,358 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:48,358 INFO L82 PathProgramCache]: Analyzing trace with hash -761242551, now seen corresponding path program 262 times [2021-03-10 21:27:48,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:48,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349537359] [2021-03-10 21:27:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:48,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349537359] [2021-03-10 21:27:48,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797234944] [2021-03-10 21:27:48,745 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:48,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:48,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:48,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:48,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:48,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:48,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-03-10 21:27:48,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554320902] [2021-03-10 21:27:48,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:27:48,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:48,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:27:48,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:27:48,819 INFO L87 Difference]: Start difference. First operand 96553 states and 293459 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:27:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:49,310 INFO L93 Difference]: Finished difference Result 96926 states and 294310 transitions. [2021-03-10 21:27:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:27:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 22 [2021-03-10 21:27:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:49,475 INFO L225 Difference]: With dead ends: 96926 [2021-03-10 21:27:49,475 INFO L226 Difference]: Without dead ends: 96924 [2021-03-10 21:27:49,475 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96924 states. [2021-03-10 21:27:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96924 to 96774. [2021-03-10 21:27:51,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96774 states, 96773 states have (on average 3.0395564878633503) internal successors, (294147), 96773 states have internal predecessors, (294147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96774 states to 96774 states and 294147 transitions. [2021-03-10 21:27:51,428 INFO L78 Accepts]: Start accepts. Automaton has 96774 states and 294147 transitions. Word has length 22 [2021-03-10 21:27:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:51,428 INFO L480 AbstractCegarLoop]: Abstraction has 96774 states and 294147 transitions. [2021-03-10 21:27:51,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:27:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 96774 states and 294147 transitions. [2021-03-10 21:27:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:51,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:51,455 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:51,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10559 [2021-03-10 21:27:51,656 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:51,656 INFO L82 PathProgramCache]: Analyzing trace with hash 956506509, now seen corresponding path program 263 times [2021-03-10 21:27:51,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:51,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174229475] [2021-03-10 21:27:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:51,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174229475] [2021-03-10 21:27:51,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976057308] [2021-03-10 21:27:51,745 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:51,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:27:51,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:51,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:51,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:51,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:51,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-03-10 21:27:51,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242255014] [2021-03-10 21:27:51,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:27:51,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:51,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:27:51,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:27:51,818 INFO L87 Difference]: Start difference. First operand 96774 states and 294147 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:27:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:52,289 INFO L93 Difference]: Finished difference Result 98650 states and 299438 transitions. [2021-03-10 21:27:52,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:27:52,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 22 [2021-03-10 21:27:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:52,467 INFO L225 Difference]: With dead ends: 98650 [2021-03-10 21:27:52,468 INFO L226 Difference]: Without dead ends: 98650 [2021-03-10 21:27:52,468 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:27:52,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98650 states. [2021-03-10 21:27:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98650 to 96776. [2021-03-10 21:27:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96776 states, 96775 states have (on average 3.0395556703694138) internal successors, (294153), 96775 states have internal predecessors, (294153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96776 states to 96776 states and 294153 transitions. [2021-03-10 21:27:54,447 INFO L78 Accepts]: Start accepts. Automaton has 96776 states and 294153 transitions. Word has length 22 [2021-03-10 21:27:54,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:54,447 INFO L480 AbstractCegarLoop]: Abstraction has 96776 states and 294153 transitions. [2021-03-10 21:27:54,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:27:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 96776 states and 294153 transitions. [2021-03-10 21:27:54,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:54,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:54,475 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:54,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10560,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:54,675 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:54,675 INFO L82 PathProgramCache]: Analyzing trace with hash -772540825, now seen corresponding path program 264 times [2021-03-10 21:27:54,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:54,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903413676] [2021-03-10 21:27:54,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:54,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903413676] [2021-03-10 21:27:54,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393472034] [2021-03-10 21:27:54,763 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:54,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:27:54,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:54,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:54,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:54,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:54,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-03-10 21:27:54,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513990788] [2021-03-10 21:27:54,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:27:54,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:54,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:27:54,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:54,843 INFO L87 Difference]: Start difference. First operand 96776 states and 294153 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:27:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:55,369 INFO L93 Difference]: Finished difference Result 100367 states and 304534 transitions. [2021-03-10 21:27:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:27:55,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 22 [2021-03-10 21:27:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:55,548 INFO L225 Difference]: With dead ends: 100367 [2021-03-10 21:27:55,548 INFO L226 Difference]: Without dead ends: 100367 [2021-03-10 21:27:55,548 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:27:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100367 states. [2021-03-10 21:27:57,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100367 to 96786. [2021-03-10 21:27:57,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96786 states, 96785 states have (on average 3.0395515834065194) internal successors, (294183), 96785 states have internal predecessors, (294183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96786 states to 96786 states and 294183 transitions. [2021-03-10 21:27:57,583 INFO L78 Accepts]: Start accepts. Automaton has 96786 states and 294183 transitions. Word has length 22 [2021-03-10 21:27:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:57,584 INFO L480 AbstractCegarLoop]: Abstraction has 96786 states and 294183 transitions. [2021-03-10 21:27:57,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:27:57,584 INFO L276 IsEmpty]: Start isEmpty. Operand 96786 states and 294183 transitions. [2021-03-10 21:27:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:27:57,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:57,612 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:57,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10561 [2021-03-10 21:27:57,813 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:57,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1461566669, now seen corresponding path program 265 times [2021-03-10 21:27:57,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:57,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464753140] [2021-03-10 21:27:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:57,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464753140] [2021-03-10 21:27:57,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598683974] [2021-03-10 21:27:57,899 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:57,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:57,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:57,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-03-10 21:27:57,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488211561] [2021-03-10 21:27:57,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:27:57,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:57,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:27:57,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:57,975 INFO L87 Difference]: Start difference. First operand 96786 states and 294183 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:27:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:58,547 INFO L93 Difference]: Finished difference Result 103852 states and 314875 transitions. [2021-03-10 21:27:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:27:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 22 [2021-03-10 21:27:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:58,736 INFO L225 Difference]: With dead ends: 103852 [2021-03-10 21:27:58,736 INFO L226 Difference]: Without dead ends: 103852 [2021-03-10 21:27:58,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=443, Invalid=963, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:27:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103852 states. [2021-03-10 21:28:00,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103852 to 100467. [2021-03-10 21:28:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100467 states, 100466 states have (on average 3.0390181753030876) internal successors, (305318), 100466 states have internal predecessors, (305318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100467 states to 100467 states and 305318 transitions. [2021-03-10 21:28:00,936 INFO L78 Accepts]: Start accepts. Automaton has 100467 states and 305318 transitions. Word has length 22 [2021-03-10 21:28:00,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:00,936 INFO L480 AbstractCegarLoop]: Abstraction has 100467 states and 305318 transitions. [2021-03-10 21:28:00,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:28:00,936 INFO L276 IsEmpty]: Start isEmpty. Operand 100467 states and 305318 transitions. [2021-03-10 21:28:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:28:00,966 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:00,966 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:01,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10562 [2021-03-10 21:28:01,167 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:01,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:01,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1999422247, now seen corresponding path program 266 times [2021-03-10 21:28:01,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:01,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120561479] [2021-03-10 21:28:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:01,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120561479] [2021-03-10 21:28:01,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900348857] [2021-03-10 21:28:01,256 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:01,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:01,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:01,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:28:01,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:01,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:01,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-03-10 21:28:01,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435814436] [2021-03-10 21:28:01,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:28:01,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:01,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:28:01,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:28:01,346 INFO L87 Difference]: Start difference. First operand 100467 states and 305318 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:28:02,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:02,299 INFO L93 Difference]: Finished difference Result 117624 states and 356391 transitions. [2021-03-10 21:28:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:28:02,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 22 [2021-03-10 21:28:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:02,518 INFO L225 Difference]: With dead ends: 117624 [2021-03-10 21:28:02,518 INFO L226 Difference]: Without dead ends: 117624 [2021-03-10 21:28:02,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 298.6ms TimeCoverageRelationStatistics Valid=533, Invalid=1189, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:28:02,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117624 states. [2021-03-10 21:28:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117624 to 114603. [2021-03-10 21:28:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114603 states, 114602 states have (on average 3.0346416292909373) internal successors, (347776), 114602 states have internal predecessors, (347776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114603 states to 114603 states and 347776 transitions. [2021-03-10 21:28:04,878 INFO L78 Accepts]: Start accepts. Automaton has 114603 states and 347776 transitions. Word has length 22 [2021-03-10 21:28:04,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:04,878 INFO L480 AbstractCegarLoop]: Abstraction has 114603 states and 347776 transitions. [2021-03-10 21:28:04,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:28:04,878 INFO L276 IsEmpty]: Start isEmpty. Operand 114603 states and 347776 transitions. [2021-03-10 21:28:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:28:04,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:04,910 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:05,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10563 [2021-03-10 21:28:05,123 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:05,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1493075981, now seen corresponding path program 267 times [2021-03-10 21:28:05,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:05,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643223381] [2021-03-10 21:28:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:05,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643223381] [2021-03-10 21:28:05,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989082835] [2021-03-10 21:28:05,220 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:05,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:28:05,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:05,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:28:05,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:05,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:05,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-03-10 21:28:05,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590461572] [2021-03-10 21:28:05,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:28:05,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:05,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:28:05,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:28:05,308 INFO L87 Difference]: Start difference. First operand 114603 states and 347776 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 21:28:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:05,999 INFO L93 Difference]: Finished difference Result 117101 states and 354865 transitions. [2021-03-10 21:28:05,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:28:05,999 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 22 [2021-03-10 21:28:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:06,219 INFO L225 Difference]: With dead ends: 117101 [2021-03-10 21:28:06,220 INFO L226 Difference]: Without dead ends: 117101 [2021-03-10 21:28:06,220 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:28:06,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117101 states. [2021-03-10 21:28:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117101 to 114723. [2021-03-10 21:28:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114723 states, 114722 states have (on average 3.034596677184847) internal successors, (348135), 114722 states have internal predecessors, (348135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114723 states to 114723 states and 348135 transitions. [2021-03-10 21:28:08,500 INFO L78 Accepts]: Start accepts. Automaton has 114723 states and 348135 transitions. Word has length 22 [2021-03-10 21:28:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:08,500 INFO L480 AbstractCegarLoop]: Abstraction has 114723 states and 348135 transitions. [2021-03-10 21:28:08,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 21:28:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 114723 states and 348135 transitions. [2021-03-10 21:28:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:28:08,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:08,822 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:09,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10564 [2021-03-10 21:28:09,035 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:09,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:09,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1318756377, now seen corresponding path program 268 times [2021-03-10 21:28:09,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:09,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581909450] [2021-03-10 21:28:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:09,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581909450] [2021-03-10 21:28:09,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209542622] [2021-03-10 21:28:09,124 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:09,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:09,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:09,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:28:09,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:09,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:09,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-03-10 21:28:09,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989421] [2021-03-10 21:28:09,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:28:09,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:09,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:28:09,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:28:09,216 INFO L87 Difference]: Start difference. First operand 114723 states and 348135 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 21:28:09,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:09,850 INFO L93 Difference]: Finished difference Result 129613 states and 392477 transitions. [2021-03-10 21:28:09,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:28:09,851 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 22 [2021-03-10 21:28:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:10,099 INFO L225 Difference]: With dead ends: 129613 [2021-03-10 21:28:10,099 INFO L226 Difference]: Without dead ends: 129613 [2021-03-10 21:28:10,099 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:28:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129613 states. [2021-03-10 21:28:12,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129613 to 128238. [2021-03-10 21:28:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128238 states, 128237 states have (on average 3.0310128901954974) internal successors, (388688), 128237 states have internal predecessors, (388688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128238 states to 128238 states and 388688 transitions. [2021-03-10 21:28:12,701 INFO L78 Accepts]: Start accepts. Automaton has 128238 states and 388688 transitions. Word has length 22 [2021-03-10 21:28:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:12,701 INFO L480 AbstractCegarLoop]: Abstraction has 128238 states and 388688 transitions. [2021-03-10 21:28:12,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 21:28:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 128238 states and 388688 transitions. [2021-03-10 21:28:12,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:28:12,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:12,734 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:12,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10565,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:12,935 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:12,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:12,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1708753741, now seen corresponding path program 269 times [2021-03-10 21:28:12,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:12,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592593954] [2021-03-10 21:28:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:13,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592593954] [2021-03-10 21:28:13,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436521874] [2021-03-10 21:28:13,026 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:13,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:28:13,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:13,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:28:13,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:13,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:13,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-03-10 21:28:13,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171699544] [2021-03-10 21:28:13,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:28:13,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:13,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:28:13,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:28:13,117 INFO L87 Difference]: Start difference. First operand 128238 states and 388688 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 21:28:14,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:14,101 INFO L93 Difference]: Finished difference Result 131498 states and 398224 transitions. [2021-03-10 21:28:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:28:14,102 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 22 [2021-03-10 21:28:14,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:14,362 INFO L225 Difference]: With dead ends: 131498 [2021-03-10 21:28:14,362 INFO L226 Difference]: Without dead ends: 131498 [2021-03-10 21:28:14,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 640.0ms TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:28:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131498 states. [2021-03-10 21:28:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131498 to 130639. [2021-03-10 21:28:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130639 states, 130638 states have (on average 3.0304429032900075) internal successors, (395891), 130638 states have internal predecessors, (395891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130639 states to 130639 states and 395891 transitions. [2021-03-10 21:28:16,895 INFO L78 Accepts]: Start accepts. Automaton has 130639 states and 395891 transitions. Word has length 22 [2021-03-10 21:28:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:16,895 INFO L480 AbstractCegarLoop]: Abstraction has 130639 states and 395891 transitions. [2021-03-10 21:28:16,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 21:28:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 130639 states and 395891 transitions. [2021-03-10 21:28:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:28:16,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:16,927 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:17,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10566 [2021-03-10 21:28:17,131 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:17,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1072286887, now seen corresponding path program 270 times [2021-03-10 21:28:17,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:17,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966424124] [2021-03-10 21:28:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:17,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966424124] [2021-03-10 21:28:17,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122933946] [2021-03-10 21:28:17,238 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:17,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:28:17,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:17,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:28:17,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:17,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:17,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-03-10 21:28:17,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366537554] [2021-03-10 21:28:17,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:28:17,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:17,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:28:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:28:17,331 INFO L87 Difference]: Start difference. First operand 130639 states and 395891 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 21:28:18,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:18,375 INFO L93 Difference]: Finished difference Result 132410 states and 400904 transitions. [2021-03-10 21:28:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:28:18,375 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 22 [2021-03-10 21:28:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:18,630 INFO L225 Difference]: With dead ends: 132410 [2021-03-10 21:28:18,631 INFO L226 Difference]: Without dead ends: 132410 [2021-03-10 21:28:18,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 319.2ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:28:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132410 states. [2021-03-10 21:28:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132410 to 130698. [2021-03-10 21:28:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130698 states, 130697 states have (on average 3.030429160577519) internal successors, (396068), 130697 states have internal predecessors, (396068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:21,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130698 states to 130698 states and 396068 transitions. [2021-03-10 21:28:21,198 INFO L78 Accepts]: Start accepts. Automaton has 130698 states and 396068 transitions. Word has length 22 [2021-03-10 21:28:21,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:21,198 INFO L480 AbstractCegarLoop]: Abstraction has 130698 states and 396068 transitions. [2021-03-10 21:28:21,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 21:28:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand 130698 states and 396068 transitions. [2021-03-10 21:28:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:28:21,232 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:21,232 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:21,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10567,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:21,439 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:21,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1478316403, now seen corresponding path program 271 times [2021-03-10 21:28:21,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:21,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359949909] [2021-03-10 21:28:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:21,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359949909] [2021-03-10 21:28:21,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393318504] [2021-03-10 21:28:21,534 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:21,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:28:21,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:21,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:21,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-03-10 21:28:21,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957912960] [2021-03-10 21:28:21,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:28:21,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:21,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:28:21,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:28:21,647 INFO L87 Difference]: Start difference. First operand 130698 states and 396068 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 21:28:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:22,786 INFO L93 Difference]: Finished difference Result 132757 states and 401917 transitions. [2021-03-10 21:28:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:28:22,787 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 22 [2021-03-10 21:28:22,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:23,033 INFO L225 Difference]: With dead ends: 132757 [2021-03-10 21:28:23,033 INFO L226 Difference]: Without dead ends: 132757 [2021-03-10 21:28:23,034 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=507, Invalid=1215, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:28:23,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132757 states. [2021-03-10 21:28:24,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132757 to 131013. [2021-03-10 21:28:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131013 states, 131012 states have (on average 3.0303559979238543) internal successors, (397013), 131012 states have internal predecessors, (397013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131013 states to 131013 states and 397013 transitions. [2021-03-10 21:28:25,388 INFO L78 Accepts]: Start accepts. Automaton has 131013 states and 397013 transitions. Word has length 22 [2021-03-10 21:28:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:25,388 INFO L480 AbstractCegarLoop]: Abstraction has 131013 states and 397013 transitions. [2021-03-10 21:28:25,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 21:28:25,388 INFO L276 IsEmpty]: Start isEmpty. Operand 131013 states and 397013 transitions. [2021-03-10 21:28:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:28:25,420 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:25,420 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:25,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10568 [2021-03-10 21:28:25,620 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:25,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:25,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1057360231, now seen corresponding path program 272 times [2021-03-10 21:28:25,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:25,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783565192] [2021-03-10 21:28:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:25,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783565192] [2021-03-10 21:28:25,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340577778] [2021-03-10 21:28:25,726 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:25,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:25,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:25,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:28:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:25,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:25,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-03-10 21:28:25,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104800598] [2021-03-10 21:28:25,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:28:25,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:25,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:28:25,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:28:25,833 INFO L87 Difference]: Start difference. First operand 131013 states and 397013 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 21:28:26,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:26,967 INFO L93 Difference]: Finished difference Result 135540 states and 410128 transitions. [2021-03-10 21:28:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:28:26,968 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 22 [2021-03-10 21:28:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:27,215 INFO L225 Difference]: With dead ends: 135540 [2021-03-10 21:28:27,216 INFO L226 Difference]: Without dead ends: 135540 [2021-03-10 21:28:27,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=851, Invalid=1905, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:28:27,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135540 states. [2021-03-10 21:28:29,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135540 to 131079. [2021-03-10 21:28:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0303407131631546) internal successors, (397211), 131078 states have internal predecessors, (397211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 397211 transitions. [2021-03-10 21:28:29,603 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 397211 transitions. Word has length 22 [2021-03-10 21:28:29,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:29,603 INFO L480 AbstractCegarLoop]: Abstraction has 131079 states and 397211 transitions. [2021-03-10 21:28:29,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 21:28:29,603 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 397211 transitions. [2021-03-10 21:28:29,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:28:29,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:29,643 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:29,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10569,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:29,844 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:29,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:29,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1384664402, now seen corresponding path program 273 times [2021-03-10 21:28:29,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:29,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530687587] [2021-03-10 21:28:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:29,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530687587] [2021-03-10 21:28:29,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187789538] [2021-03-10 21:28:29,953 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:29,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:28:29,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:29,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:28:29,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:30,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:30,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 21:28:30,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114772432] [2021-03-10 21:28:30,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:28:30,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:30,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:28:30,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:28:30,029 INFO L87 Difference]: Start difference. First operand 131079 states and 397211 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 21:28:31,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:31,016 INFO L93 Difference]: Finished difference Result 131316 states and 397574 transitions. [2021-03-10 21:28:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:28:31,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 24 [2021-03-10 21:28:31,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:31,266 INFO L225 Difference]: With dead ends: 131316 [2021-03-10 21:28:31,267 INFO L226 Difference]: Without dead ends: 131310 [2021-03-10 21:28:31,267 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:28:31,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131310 states. [2021-03-10 21:28:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131310 to 131104. [2021-03-10 21:28:33,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0301594929177824) internal successors, (397263), 131103 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397263 transitions. [2021-03-10 21:28:33,687 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397263 transitions. Word has length 24 [2021-03-10 21:28:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:33,687 INFO L480 AbstractCegarLoop]: Abstraction has 131104 states and 397263 transitions. [2021-03-10 21:28:33,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 21:28:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397263 transitions. [2021-03-10 21:28:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:28:33,727 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:33,727 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:33,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10570,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:33,928 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:33,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1036551628, now seen corresponding path program 274 times [2021-03-10 21:28:33,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:33,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780703111] [2021-03-10 21:28:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:34,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780703111] [2021-03-10 21:28:34,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774351825] [2021-03-10 21:28:34,010 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:34,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:34,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:34,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:28:34,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:34,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:34,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 19 [2021-03-10 21:28:34,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570586794] [2021-03-10 21:28:34,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:28:34,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:34,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:28:34,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:28:34,111 INFO L87 Difference]: Start difference. First operand 131104 states and 397263 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:35,082 INFO L93 Difference]: Finished difference Result 131229 states and 397402 transitions. [2021-03-10 21:28:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:28:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:28:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:35,317 INFO L225 Difference]: With dead ends: 131229 [2021-03-10 21:28:35,317 INFO L226 Difference]: Without dead ends: 131229 [2021-03-10 21:28:35,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:28:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131229 states. [2021-03-10 21:28:37,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131229 to 131082. [2021-03-10 21:28:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0302637300600392) internal successors, (397210), 131081 states have internal predecessors, (397210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 397210 transitions. [2021-03-10 21:28:37,506 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 397210 transitions. Word has length 24 [2021-03-10 21:28:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:37,506 INFO L480 AbstractCegarLoop]: Abstraction has 131082 states and 397210 transitions. [2021-03-10 21:28:37,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 397210 transitions. [2021-03-10 21:28:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:28:37,546 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:37,546 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:37,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10571,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:37,746 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:37,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:37,747 INFO L82 PathProgramCache]: Analyzing trace with hash -757952152, now seen corresponding path program 275 times [2021-03-10 21:28:37,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:37,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035627812] [2021-03-10 21:28:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:37,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035627812] [2021-03-10 21:28:37,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834491193] [2021-03-10 21:28:37,827 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:37,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:28:37,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:37,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:28:37,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:28:37,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:37,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 19 [2021-03-10 21:28:37,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988063566] [2021-03-10 21:28:37,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:28:37,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:37,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:28:37,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:28:37,940 INFO L87 Difference]: Start difference. First operand 131082 states and 397210 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:38,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:38,486 INFO L93 Difference]: Finished difference Result 131237 states and 397440 transitions. [2021-03-10 21:28:38,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:28:38,486 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:28:38,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:38,721 INFO L225 Difference]: With dead ends: 131237 [2021-03-10 21:28:38,721 INFO L226 Difference]: Without dead ends: 131237 [2021-03-10 21:28:38,721 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:28:39,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131237 states. [2021-03-10 21:28:41,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131237 to 131093. [2021-03-10 21:28:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.0302077930003355) internal successors, (397236), 131092 states have internal predecessors, (397236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397236 transitions. [2021-03-10 21:28:41,479 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397236 transitions. Word has length 24 [2021-03-10 21:28:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:41,479 INFO L480 AbstractCegarLoop]: Abstraction has 131093 states and 397236 transitions. [2021-03-10 21:28:41,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397236 transitions. [2021-03-10 21:28:41,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:28:41,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:41,520 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:41,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10572 [2021-03-10 21:28:41,720 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:41,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:41,720 INFO L82 PathProgramCache]: Analyzing trace with hash -711302988, now seen corresponding path program 276 times [2021-03-10 21:28:41,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:41,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33079327] [2021-03-10 21:28:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:41,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33079327] [2021-03-10 21:28:41,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787755961] [2021-03-10 21:28:41,804 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:41,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:28:41,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:41,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:28:41,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:41,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:41,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:28:41,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696650350] [2021-03-10 21:28:41,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:28:41,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:41,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:28:41,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:41,870 INFO L87 Difference]: Start difference. First operand 131093 states and 397236 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:28:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:42,429 INFO L93 Difference]: Finished difference Result 131154 states and 397359 transitions. [2021-03-10 21:28:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:28:42,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 24 [2021-03-10 21:28:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:42,668 INFO L225 Difference]: With dead ends: 131154 [2021-03-10 21:28:42,668 INFO L226 Difference]: Without dead ends: 131153 [2021-03-10 21:28:42,668 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:28:42,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131153 states. [2021-03-10 21:28:44,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131153 to 131093. [2021-03-10 21:28:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.030184908308669) internal successors, (397233), 131092 states have internal predecessors, (397233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397233 transitions. [2021-03-10 21:28:45,531 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397233 transitions. Word has length 24 [2021-03-10 21:28:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:45,532 INFO L480 AbstractCegarLoop]: Abstraction has 131093 states and 397233 transitions. [2021-03-10 21:28:45,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:28:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397233 transitions. [2021-03-10 21:28:45,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:28:45,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:45,569 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:45,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10573 [2021-03-10 21:28:45,769 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:45,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:45,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1157400778, now seen corresponding path program 277 times [2021-03-10 21:28:45,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:45,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498500613] [2021-03-10 21:28:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:28:45,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498500613] [2021-03-10 21:28:45,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146104302] [2021-03-10 21:28:45,834 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:45,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:28:45,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:28:45,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:45,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:28:45,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843234503] [2021-03-10 21:28:45,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:28:45,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:45,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:28:45,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:28:45,904 INFO L87 Difference]: Start difference. First operand 131093 states and 397233 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:28:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:46,409 INFO L93 Difference]: Finished difference Result 131454 states and 397901 transitions. [2021-03-10 21:28:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:28:46,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 24 [2021-03-10 21:28:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:46,646 INFO L225 Difference]: With dead ends: 131454 [2021-03-10 21:28:46,647 INFO L226 Difference]: Without dead ends: 131452 [2021-03-10 21:28:46,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:28:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-03-10 21:28:48,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131181. [2021-03-10 21:28:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131181 states, 131180 states have (on average 3.0299893276414087) internal successors, (397474), 131180 states have internal predecessors, (397474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:49,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131181 states to 131181 states and 397474 transitions. [2021-03-10 21:28:49,251 INFO L78 Accepts]: Start accepts. Automaton has 131181 states and 397474 transitions. Word has length 24 [2021-03-10 21:28:49,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:49,251 INFO L480 AbstractCegarLoop]: Abstraction has 131181 states and 397474 transitions. [2021-03-10 21:28:49,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:28:49,251 INFO L276 IsEmpty]: Start isEmpty. Operand 131181 states and 397474 transitions. [2021-03-10 21:28:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:28:49,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:49,291 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:49,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10574 [2021-03-10 21:28:49,491 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:49,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:49,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1392111828, now seen corresponding path program 278 times [2021-03-10 21:28:49,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:49,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24332410] [2021-03-10 21:28:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:28:49,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24332410] [2021-03-10 21:28:49,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214436089] [2021-03-10 21:28:49,874 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:49,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:49,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:49,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:28:49,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:28:50,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:50,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:28:50,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433795304] [2021-03-10 21:28:50,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:50,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:50,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:50,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:50,011 INFO L87 Difference]: Start difference. First operand 131181 states and 397474 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) 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 21:28:50,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:50,559 INFO L93 Difference]: Finished difference Result 131473 states and 397928 transitions. [2021-03-10 21:28:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:28:50,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) 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 24 [2021-03-10 21:28:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:50,799 INFO L225 Difference]: With dead ends: 131473 [2021-03-10 21:28:50,799 INFO L226 Difference]: Without dead ends: 131464 [2021-03-10 21:28:50,799 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 445.3ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:28:50,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131464 states. [2021-03-10 21:28:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131464 to 131129. [2021-03-10 21:28:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131129 states, 131128 states have (on average 3.030046976999573) internal successors, (397324), 131128 states have internal predecessors, (397324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131129 states to 131129 states and 397324 transitions. [2021-03-10 21:28:53,312 INFO L78 Accepts]: Start accepts. Automaton has 131129 states and 397324 transitions. Word has length 24 [2021-03-10 21:28:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:53,312 INFO L480 AbstractCegarLoop]: Abstraction has 131129 states and 397324 transitions. [2021-03-10 21:28:53,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) 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 21:28:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 131129 states and 397324 transitions. [2021-03-10 21:28:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:28:53,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:53,352 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:53,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10575 [2021-03-10 21:28:53,552 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:53,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:53,552 INFO L82 PathProgramCache]: Analyzing trace with hash 318501480, now seen corresponding path program 279 times [2021-03-10 21:28:53,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:53,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326554803] [2021-03-10 21:28:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:53,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326554803] [2021-03-10 21:28:53,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969001028] [2021-03-10 21:28:53,623 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:53,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:28:53,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:53,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:28:53,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:53,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:53,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:28:53,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940205063] [2021-03-10 21:28:53,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:53,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:53,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:53,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:53,688 INFO L87 Difference]: Start difference. First operand 131129 states and 397324 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:28:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:54,551 INFO L93 Difference]: Finished difference Result 131345 states and 397633 transitions. [2021-03-10 21:28:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:28:54,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 24 [2021-03-10 21:28:54,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:54,790 INFO L225 Difference]: With dead ends: 131345 [2021-03-10 21:28:54,790 INFO L226 Difference]: Without dead ends: 131343 [2021-03-10 21:28:54,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:28:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131343 states. [2021-03-10 21:28:56,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131343 to 131121. [2021-03-10 21:28:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131121 states, 131120 states have (on average 3.0300030506406346) internal successors, (397294), 131120 states have internal predecessors, (397294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:57,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131121 states to 131121 states and 397294 transitions. [2021-03-10 21:28:57,226 INFO L78 Accepts]: Start accepts. Automaton has 131121 states and 397294 transitions. Word has length 24 [2021-03-10 21:28:57,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:57,226 INFO L480 AbstractCegarLoop]: Abstraction has 131121 states and 397294 transitions. [2021-03-10 21:28:57,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:28:57,226 INFO L276 IsEmpty]: Start isEmpty. Operand 131121 states and 397294 transitions. [2021-03-10 21:28:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:28:57,265 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:57,265 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:57,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10576 [2021-03-10 21:28:57,466 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:57,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1807906476, now seen corresponding path program 280 times [2021-03-10 21:28:57,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:57,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694269526] [2021-03-10 21:28:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:57,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694269526] [2021-03-10 21:28:57,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503629754] [2021-03-10 21:28:57,543 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:57,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:57,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:57,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:28:57,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:28:57,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:57,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-03-10 21:28:57,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955358419] [2021-03-10 21:28:57,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:28:57,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:57,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:28:57,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:57,602 INFO L87 Difference]: Start difference. First operand 131121 states and 397294 transitions. Second operand has 16 states, 16 states have (on average 1.8125) 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 21:28:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:58,682 INFO L93 Difference]: Finished difference Result 131339 states and 397604 transitions. [2021-03-10 21:28:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:28:58,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) 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 24 [2021-03-10 21:28:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:58,901 INFO L225 Difference]: With dead ends: 131339 [2021-03-10 21:28:58,901 INFO L226 Difference]: Without dead ends: 131336 [2021-03-10 21:28:58,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:28:59,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131336 states. [2021-03-10 21:29:00,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131336 to 131113. [2021-03-10 21:29:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.0299667459881627) internal successors, (397265), 131112 states have internal predecessors, (397265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397265 transitions. [2021-03-10 21:29:01,592 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397265 transitions. Word has length 24 [2021-03-10 21:29:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:01,592 INFO L480 AbstractCegarLoop]: Abstraction has 131113 states and 397265 transitions. [2021-03-10 21:29:01,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) 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 21:29:01,592 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397265 transitions. [2021-03-10 21:29:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:01,632 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:01,632 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:01,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10577,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:01,832 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:01,833 INFO L82 PathProgramCache]: Analyzing trace with hash 734821096, now seen corresponding path program 281 times [2021-03-10 21:29:01,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:01,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52240748] [2021-03-10 21:29:01,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:01,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52240748] [2021-03-10 21:29:01,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616814382] [2021-03-10 21:29:01,923 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:01,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:29:01,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:01,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:29:01,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:29:01,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:01,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-03-10 21:29:01,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224496213] [2021-03-10 21:29:01,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:01,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:01,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:01,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:01,990 INFO L87 Difference]: Start difference. First operand 131113 states and 397265 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:29:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:02,618 INFO L93 Difference]: Finished difference Result 131264 states and 397507 transitions. [2021-03-10 21:29:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:29:02,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 24 [2021-03-10 21:29:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:02,859 INFO L225 Difference]: With dead ends: 131264 [2021-03-10 21:29:02,859 INFO L226 Difference]: Without dead ends: 131259 [2021-03-10 21:29:02,859 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:29:02,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131259 states. [2021-03-10 21:29:04,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131259 to 131113. [2021-03-10 21:29:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.029920983586552) internal successors, (397259), 131112 states have internal predecessors, (397259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397259 transitions. [2021-03-10 21:29:05,730 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397259 transitions. Word has length 24 [2021-03-10 21:29:05,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:05,731 INFO L480 AbstractCegarLoop]: Abstraction has 131113 states and 397259 transitions. [2021-03-10 21:29:05,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:29:05,731 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397259 transitions. [2021-03-10 21:29:05,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:05,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:05,769 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:05,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10578 [2021-03-10 21:29:05,969 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1943482834, now seen corresponding path program 282 times [2021-03-10 21:29:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:05,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389390083] [2021-03-10 21:29:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:29:06,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389390083] [2021-03-10 21:29:06,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758629248] [2021-03-10 21:29:06,030 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:06,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:29:06,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:06,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:29:06,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:29:06,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:06,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:29:06,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3204279] [2021-03-10 21:29:06,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:29:06,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:06,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:29:06,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:06,101 INFO L87 Difference]: Start difference. First operand 131113 states and 397259 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:29:06,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:06,599 INFO L93 Difference]: Finished difference Result 131472 states and 397913 transitions. [2021-03-10 21:29:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:06,600 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 24 [2021-03-10 21:29:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:06,841 INFO L225 Difference]: With dead ends: 131472 [2021-03-10 21:29:06,841 INFO L226 Difference]: Without dead ends: 131470 [2021-03-10 21:29:06,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:06,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-03-10 21:29:08,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131189. [2021-03-10 21:29:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131189 states, 131188 states have (on average 3.0296902155684973) internal successors, (397459), 131188 states have internal predecessors, (397459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:09,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131189 states to 131189 states and 397459 transitions. [2021-03-10 21:29:09,384 INFO L78 Accepts]: Start accepts. Automaton has 131189 states and 397459 transitions. Word has length 24 [2021-03-10 21:29:09,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:09,384 INFO L480 AbstractCegarLoop]: Abstraction has 131189 states and 397459 transitions. [2021-03-10 21:29:09,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:29:09,385 INFO L276 IsEmpty]: Start isEmpty. Operand 131189 states and 397459 transitions. [2021-03-10 21:29:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:09,424 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:09,424 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:09,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10579,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:09,625 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:09,625 INFO L82 PathProgramCache]: Analyzing trace with hash -606029772, now seen corresponding path program 283 times [2021-03-10 21:29:09,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:09,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145042305] [2021-03-10 21:29:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:09,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145042305] [2021-03-10 21:29:09,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550462290] [2021-03-10 21:29:09,694 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:09,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:29:09,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:29:10,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:10,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:29:10,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126523406] [2021-03-10 21:29:10,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:10,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:10,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:10,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:10,099 INFO L87 Difference]: Start difference. First operand 131189 states and 397459 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) 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 21:29:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:10,652 INFO L93 Difference]: Finished difference Result 131509 states and 397970 transitions. [2021-03-10 21:29:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:29:10,653 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) 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 24 [2021-03-10 21:29:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:10,905 INFO L225 Difference]: With dead ends: 131509 [2021-03-10 21:29:10,905 INFO L226 Difference]: Without dead ends: 131502 [2021-03-10 21:29:10,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:29:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131502 states. [2021-03-10 21:29:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131502 to 131146. [2021-03-10 21:29:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131146 states, 131145 states have (on average 3.029646574402379) internal successors, (397323), 131145 states have internal predecessors, (397323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:13,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131146 states to 131146 states and 397323 transitions. [2021-03-10 21:29:13,411 INFO L78 Accepts]: Start accepts. Automaton has 131146 states and 397323 transitions. Word has length 24 [2021-03-10 21:29:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:13,411 INFO L480 AbstractCegarLoop]: Abstraction has 131146 states and 397323 transitions. [2021-03-10 21:29:13,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) 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 21:29:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 131146 states and 397323 transitions. [2021-03-10 21:29:13,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:13,452 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:13,452 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:13,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10580,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:13,665 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:13,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:13,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1104583536, now seen corresponding path program 284 times [2021-03-10 21:29:13,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:13,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932255959] [2021-03-10 21:29:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:13,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932255959] [2021-03-10 21:29:13,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851505705] [2021-03-10 21:29:13,732 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:13,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:13,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:13,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:29:13,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:29:13,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:13,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-03-10 21:29:13,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570814332] [2021-03-10 21:29:13,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:13,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:13,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:13,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:13,807 INFO L87 Difference]: Start difference. First operand 131146 states and 397323 transitions. Second operand has 16 states, 16 states have (on average 1.8125) 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 21:29:14,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:14,761 INFO L93 Difference]: Finished difference Result 131510 states and 397931 transitions. [2021-03-10 21:29:14,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:29:14,761 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) 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 24 [2021-03-10 21:29:14,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:14,998 INFO L225 Difference]: With dead ends: 131510 [2021-03-10 21:29:14,998 INFO L226 Difference]: Without dead ends: 131508 [2021-03-10 21:29:14,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:29:15,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131508 states. [2021-03-10 21:29:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131508 to 131130. [2021-03-10 21:29:17,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131130 states, 131129 states have (on average 3.029581557092634) internal successors, (397266), 131129 states have internal predecessors, (397266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131130 states to 131130 states and 397266 transitions. [2021-03-10 21:29:17,471 INFO L78 Accepts]: Start accepts. Automaton has 131130 states and 397266 transitions. Word has length 24 [2021-03-10 21:29:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:17,472 INFO L480 AbstractCegarLoop]: Abstraction has 131130 states and 397266 transitions. [2021-03-10 21:29:17,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) 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 21:29:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 131130 states and 397266 transitions. [2021-03-10 21:29:17,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:17,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:17,512 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:17,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10581,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:17,712 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:17,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:17,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1700978764, now seen corresponding path program 285 times [2021-03-10 21:29:17,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:17,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880506296] [2021-03-10 21:29:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:17,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880506296] [2021-03-10 21:29:17,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877880437] [2021-03-10 21:29:17,786 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:17,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:29:17,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:17,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:29:17,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:17,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:17,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:29:17,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834825531] [2021-03-10 21:29:17,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:17,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:17,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:17,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:17,852 INFO L87 Difference]: Start difference. First operand 131130 states and 397266 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:29:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:18,881 INFO L93 Difference]: Finished difference Result 131365 states and 397609 transitions. [2021-03-10 21:29:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:29:18,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 24 [2021-03-10 21:29:18,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:19,111 INFO L225 Difference]: With dead ends: 131365 [2021-03-10 21:29:19,111 INFO L226 Difference]: Without dead ends: 131362 [2021-03-10 21:29:19,111 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=279, Invalid=591, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:29:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131362 states. [2021-03-10 21:29:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131362 to 131116. [2021-03-10 21:29:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.029531327460626) internal successors, (397217), 131115 states have internal predecessors, (397217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397217 transitions. [2021-03-10 21:29:21,424 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397217 transitions. Word has length 24 [2021-03-10 21:29:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:21,424 INFO L480 AbstractCegarLoop]: Abstraction has 131116 states and 397217 transitions. [2021-03-10 21:29:21,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:29:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397217 transitions. [2021-03-10 21:29:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:21,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:21,465 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:21,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10582,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:21,665 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:21,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1520903152, now seen corresponding path program 286 times [2021-03-10 21:29:21,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:21,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440629002] [2021-03-10 21:29:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:21,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440629002] [2021-03-10 21:29:21,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154100218] [2021-03-10 21:29:21,743 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:21,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:21,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:21,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:29:21,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:29:21,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:21,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-03-10 21:29:21,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171555932] [2021-03-10 21:29:21,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:21,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:21,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:21,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:21,809 INFO L87 Difference]: Start difference. First operand 131116 states and 397217 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:29:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:22,457 INFO L93 Difference]: Finished difference Result 131356 states and 397566 transitions. [2021-03-10 21:29:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:29:22,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 24 [2021-03-10 21:29:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:23,099 INFO L225 Difference]: With dead ends: 131356 [2021-03-10 21:29:23,099 INFO L226 Difference]: Without dead ends: 131351 [2021-03-10 21:29:23,100 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=316, Invalid=676, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:29:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131351 states. [2021-03-10 21:29:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131351 to 131116. [2021-03-10 21:29:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0294016702894404) internal successors, (397200), 131115 states have internal predecessors, (397200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397200 transitions. [2021-03-10 21:29:25,315 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397200 transitions. Word has length 24 [2021-03-10 21:29:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:25,315 INFO L480 AbstractCegarLoop]: Abstraction has 131116 states and 397200 transitions. [2021-03-10 21:29:25,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:29:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397200 transitions. [2021-03-10 21:29:25,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:25,356 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:25,356 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:25,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10583 [2021-03-10 21:29:25,556 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:25,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:25,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1679972556, now seen corresponding path program 287 times [2021-03-10 21:29:25,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:25,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529767976] [2021-03-10 21:29:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:25,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529767976] [2021-03-10 21:29:25,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14147667] [2021-03-10 21:29:25,639 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:25,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:29:25,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:25,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:29:25,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:29:25,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:25,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-03-10 21:29:25,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069582815] [2021-03-10 21:29:25,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:25,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:25,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:25,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:25,707 INFO L87 Difference]: Start difference. First operand 131116 states and 397200 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:29:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:26,270 INFO L93 Difference]: Finished difference Result 131372 states and 397726 transitions. [2021-03-10 21:29:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:29:26,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 24 [2021-03-10 21:29:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:26,508 INFO L225 Difference]: With dead ends: 131372 [2021-03-10 21:29:26,508 INFO L226 Difference]: Without dead ends: 131369 [2021-03-10 21:29:26,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:29:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131369 states. [2021-03-10 21:29:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131369 to 131116. [2021-03-10 21:29:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0293787896121724) internal successors, (397197), 131115 states have internal predecessors, (397197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397197 transitions. [2021-03-10 21:29:29,358 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397197 transitions. Word has length 24 [2021-03-10 21:29:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:29,359 INFO L480 AbstractCegarLoop]: Abstraction has 131116 states and 397197 transitions. [2021-03-10 21:29:29,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:29:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397197 transitions. [2021-03-10 21:29:29,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:29,395 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:29,395 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:29,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10584,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:29,596 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:29,596 INFO L82 PathProgramCache]: Analyzing trace with hash 542222794, now seen corresponding path program 288 times [2021-03-10 21:29:29,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:29,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669468483] [2021-03-10 21:29:29,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:29:29,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669468483] [2021-03-10 21:29:29,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843949723] [2021-03-10 21:29:29,655 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:29,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:29:29,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:29,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:29:29,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:29:29,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:29,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:29:29,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291828689] [2021-03-10 21:29:29,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:29:29,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:29,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:29:29,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:29,726 INFO L87 Difference]: Start difference. First operand 131116 states and 397197 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:29:30,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:30,217 INFO L93 Difference]: Finished difference Result 131414 states and 397691 transitions. [2021-03-10 21:29:30,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:30,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 24 [2021-03-10 21:29:30,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:30,464 INFO L225 Difference]: With dead ends: 131414 [2021-03-10 21:29:30,464 INFO L226 Difference]: Without dead ends: 131412 [2021-03-10 21:29:30,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131412 states. [2021-03-10 21:29:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131412 to 131150. [2021-03-10 21:29:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131150 states, 131149 states have (on average 3.029096676299476) internal successors, (397263), 131149 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131150 states to 131150 states and 397263 transitions. [2021-03-10 21:29:33,018 INFO L78 Accepts]: Start accepts. Automaton has 131150 states and 397263 transitions. Word has length 24 [2021-03-10 21:29:33,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:33,018 INFO L480 AbstractCegarLoop]: Abstraction has 131150 states and 397263 transitions. [2021-03-10 21:29:33,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:29:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 131150 states and 397263 transitions. [2021-03-10 21:29:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:33,379 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:33,379 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:33,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10585 [2021-03-10 21:29:33,593 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:33,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2007289812, now seen corresponding path program 289 times [2021-03-10 21:29:33,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:33,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104720931] [2021-03-10 21:29:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:33,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104720931] [2021-03-10 21:29:33,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764517214] [2021-03-10 21:29:33,653 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:33,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:29:33,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:29:33,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:33,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:29:33,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035836857] [2021-03-10 21:29:33,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:33,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:33,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:33,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:33,720 INFO L87 Difference]: Start difference. First operand 131150 states and 397263 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) 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 21:29:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:34,217 INFO L93 Difference]: Finished difference Result 131457 states and 397741 transitions. [2021-03-10 21:29:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:34,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) 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 24 [2021-03-10 21:29:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:34,455 INFO L225 Difference]: With dead ends: 131457 [2021-03-10 21:29:34,456 INFO L226 Difference]: Without dead ends: 131452 [2021-03-10 21:29:34,456 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:34,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-03-10 21:29:36,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131114. [2021-03-10 21:29:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131114 states, 131113 states have (on average 3.028967379283519) internal successors, (397137), 131113 states have internal predecessors, (397137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131114 states to 131114 states and 397137 transitions. [2021-03-10 21:29:36,928 INFO L78 Accepts]: Start accepts. Automaton has 131114 states and 397137 transitions. Word has length 24 [2021-03-10 21:29:36,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:36,928 INFO L480 AbstractCegarLoop]: Abstraction has 131114 states and 397137 transitions. [2021-03-10 21:29:36,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) 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 21:29:36,928 INFO L276 IsEmpty]: Start isEmpty. Operand 131114 states and 397137 transitions. [2021-03-10 21:29:36,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:36,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:36,968 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:37,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10586 [2021-03-10 21:29:37,168 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:37,168 INFO L82 PathProgramCache]: Analyzing trace with hash -296676504, now seen corresponding path program 290 times [2021-03-10 21:29:37,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:37,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646754941] [2021-03-10 21:29:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:37,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646754941] [2021-03-10 21:29:37,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080208411] [2021-03-10 21:29:37,234 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:37,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:37,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:37,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:29:37,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:29:37,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:37,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-03-10 21:29:37,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427106239] [2021-03-10 21:29:37,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:37,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:37,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:37,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:37,301 INFO L87 Difference]: Start difference. First operand 131114 states and 397137 transitions. Second operand has 16 states, 16 states have (on average 1.8125) 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 21:29:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:38,191 INFO L93 Difference]: Finished difference Result 131477 states and 397730 transitions. [2021-03-10 21:29:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:29:38,191 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) 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 24 [2021-03-10 21:29:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:38,427 INFO L225 Difference]: With dead ends: 131477 [2021-03-10 21:29:38,427 INFO L226 Difference]: Without dead ends: 131475 [2021-03-10 21:29:38,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:29:38,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131475 states. [2021-03-10 21:29:40,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131475 to 131109. [2021-03-10 21:29:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131109 states, 131108 states have (on average 3.0287701742075237) internal successors, (397096), 131108 states have internal predecessors, (397096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131109 states to 131109 states and 397096 transitions. [2021-03-10 21:29:40,908 INFO L78 Accepts]: Start accepts. Automaton has 131109 states and 397096 transitions. Word has length 24 [2021-03-10 21:29:40,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:40,908 INFO L480 AbstractCegarLoop]: Abstraction has 131109 states and 397096 transitions. [2021-03-10 21:29:40,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) 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 21:29:40,908 INFO L276 IsEmpty]: Start isEmpty. Operand 131109 states and 397096 transitions. [2021-03-10 21:29:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:40,949 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:40,949 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:41,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10587 [2021-03-10 21:29:41,149 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:41,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1192728492, now seen corresponding path program 291 times [2021-03-10 21:29:41,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:41,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589240176] [2021-03-10 21:29:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:41,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589240176] [2021-03-10 21:29:41,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358653720] [2021-03-10 21:29:41,222 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:41,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:29:41,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:41,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:29:41,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:41,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:41,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:29:41,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443176167] [2021-03-10 21:29:41,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:41,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:41,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:41,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:41,288 INFO L87 Difference]: Start difference. First operand 131109 states and 397096 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:29:42,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:42,342 INFO L93 Difference]: Finished difference Result 131340 states and 397434 transitions. [2021-03-10 21:29:42,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:29:42,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 24 [2021-03-10 21:29:42,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:42,564 INFO L225 Difference]: With dead ends: 131340 [2021-03-10 21:29:42,564 INFO L226 Difference]: Without dead ends: 131337 [2021-03-10 21:29:42,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:29:42,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131337 states. [2021-03-10 21:29:44,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131337 to 131102. [2021-03-10 21:29:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.0285733899817697) internal successors, (397049), 131101 states have internal predecessors, (397049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397049 transitions. [2021-03-10 21:29:44,869 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397049 transitions. Word has length 24 [2021-03-10 21:29:44,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:44,870 INFO L480 AbstractCegarLoop]: Abstraction has 131102 states and 397049 transitions. [2021-03-10 21:29:44,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:29:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397049 transitions. [2021-03-10 21:29:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:44,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:44,910 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:45,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10588,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:45,110 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:45,110 INFO L82 PathProgramCache]: Analyzing trace with hash 119643112, now seen corresponding path program 292 times [2021-03-10 21:29:45,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:45,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657269266] [2021-03-10 21:29:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:45,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657269266] [2021-03-10 21:29:45,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739171577] [2021-03-10 21:29:45,191 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:45,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:45,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:45,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:29:45,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:29:45,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:45,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-03-10 21:29:45,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728164026] [2021-03-10 21:29:45,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:45,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:45,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:45,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:45,249 INFO L87 Difference]: Start difference. First operand 131102 states and 397049 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:29:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:45,864 INFO L93 Difference]: Finished difference Result 131338 states and 397393 transitions. [2021-03-10 21:29:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:29:45,864 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 24 [2021-03-10 21:29:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:46,524 INFO L225 Difference]: With dead ends: 131338 [2021-03-10 21:29:46,524 INFO L226 Difference]: Without dead ends: 131333 [2021-03-10 21:29:46,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:29:46,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131333 states. [2021-03-10 21:29:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131333 to 131102. [2021-03-10 21:29:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.028352186482178) internal successors, (397020), 131101 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397020 transitions. [2021-03-10 21:29:48,752 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397020 transitions. Word has length 24 [2021-03-10 21:29:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:48,752 INFO L480 AbstractCegarLoop]: Abstraction has 131102 states and 397020 transitions. [2021-03-10 21:29:48,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:29:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397020 transitions. [2021-03-10 21:29:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:48,793 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:48,793 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:48,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10589 [2021-03-10 21:29:48,993 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:48,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:48,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1213734700, now seen corresponding path program 293 times [2021-03-10 21:29:48,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:48,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402931107] [2021-03-10 21:29:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:49,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402931107] [2021-03-10 21:29:49,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562631381] [2021-03-10 21:29:49,077 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:49,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:29:49,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:49,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:29:49,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:49,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:49,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:29:49,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261313649] [2021-03-10 21:29:49,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:49,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:49,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:49,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:49,141 INFO L87 Difference]: Start difference. First operand 131102 states and 397020 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:29:49,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:49,708 INFO L93 Difference]: Finished difference Result 131408 states and 397643 transitions. [2021-03-10 21:29:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:29:49,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-03-10 21:29:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:49,950 INFO L225 Difference]: With dead ends: 131408 [2021-03-10 21:29:49,950 INFO L226 Difference]: Without dead ends: 131405 [2021-03-10 21:29:49,950 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:29:50,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131405 states. [2021-03-10 21:29:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131405 to 131104. [2021-03-10 21:29:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.028328871192879) internal successors, (397023), 131103 states have internal predecessors, (397023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397023 transitions. [2021-03-10 21:29:53,031 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397023 transitions. Word has length 24 [2021-03-10 21:29:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:53,031 INFO L480 AbstractCegarLoop]: Abstraction has 131104 states and 397023 transitions. [2021-03-10 21:29:53,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:29:53,031 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397023 transitions. [2021-03-10 21:29:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:53,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:53,073 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:53,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10590,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:53,283 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:53,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:53,283 INFO L82 PathProgramCache]: Analyzing trace with hash 770835560, now seen corresponding path program 294 times [2021-03-10 21:29:53,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:53,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911768816] [2021-03-10 21:29:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:53,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911768816] [2021-03-10 21:29:53,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208914587] [2021-03-10 21:29:53,379 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:53,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 21:29:53,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:53,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:29:53,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:53,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:53,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:29:53,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146418257] [2021-03-10 21:29:53,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:53,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:53,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:53,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:53,451 INFO L87 Difference]: Start difference. First operand 131104 states and 397023 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:29:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:54,073 INFO L93 Difference]: Finished difference Result 131400 states and 397630 transitions. [2021-03-10 21:29:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:29:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-03-10 21:29:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:54,342 INFO L225 Difference]: With dead ends: 131400 [2021-03-10 21:29:54,342 INFO L226 Difference]: Without dead ends: 131396 [2021-03-10 21:29:54,364 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:29:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131396 states. [2021-03-10 21:29:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131396 to 131104. [2021-03-10 21:29:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0283059884213177) internal successors, (397020), 131103 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397020 transitions. [2021-03-10 21:29:56,750 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397020 transitions. Word has length 24 [2021-03-10 21:29:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:56,750 INFO L480 AbstractCegarLoop]: Abstraction has 131104 states and 397020 transitions. [2021-03-10 21:29:56,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:29:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397020 transitions. [2021-03-10 21:29:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:29:56,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:56,789 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:56,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10591,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:56,990 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:56,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:56,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1666696844, now seen corresponding path program 295 times [2021-03-10 21:29:56,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:56,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170996681] [2021-03-10 21:29:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:57,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170996681] [2021-03-10 21:29:57,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723006409] [2021-03-10 21:29:57,068 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:57,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:29:57,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:29:57,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:57,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-03-10 21:29:57,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334622788] [2021-03-10 21:29:57,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:57,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:57,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:57,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:57,128 INFO L87 Difference]: Start difference. First operand 131104 states and 397020 transitions. Second operand has 16 states, 16 states have (on average 1.75) 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 21:29:58,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:58,038 INFO L93 Difference]: Finished difference Result 131360 states and 397542 transitions. [2021-03-10 21:29:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:29:58,038 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) 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 24 [2021-03-10 21:29:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:58,274 INFO L225 Difference]: With dead ends: 131360 [2021-03-10 21:29:58,274 INFO L226 Difference]: Without dead ends: 131357 [2021-03-10 21:29:58,274 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:29:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131357 states. [2021-03-10 21:30:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131357 to 131089. [2021-03-10 21:30:00,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131089 states, 131088 states have (on average 3.0283626266324912) internal successors, (396982), 131088 states have internal predecessors, (396982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131089 states to 131089 states and 396982 transitions. [2021-03-10 21:30:00,729 INFO L78 Accepts]: Start accepts. Automaton has 131089 states and 396982 transitions. Word has length 24 [2021-03-10 21:30:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:00,729 INFO L480 AbstractCegarLoop]: Abstraction has 131089 states and 396982 transitions. [2021-03-10 21:30:00,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) 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 21:30:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 131089 states and 396982 transitions. [2021-03-10 21:30:00,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:00,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:00,769 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:00,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10592 [2021-03-10 21:30:00,969 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:00,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:00,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1360813274, now seen corresponding path program 296 times [2021-03-10 21:30:00,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:00,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841925038] [2021-03-10 21:30:00,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:01,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841925038] [2021-03-10 21:30:01,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404590179] [2021-03-10 21:30:01,051 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:01,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:01,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:01,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:30:01,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:30:01,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:01,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-03-10 21:30:01,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961562354] [2021-03-10 21:30:01,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:01,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:01,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:01,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:01,111 INFO L87 Difference]: Start difference. First operand 131089 states and 396982 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:30:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:02,161 INFO L93 Difference]: Finished difference Result 131311 states and 397318 transitions. [2021-03-10 21:30:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:30:02,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 24 [2021-03-10 21:30:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:02,426 INFO L225 Difference]: With dead ends: 131311 [2021-03-10 21:30:02,426 INFO L226 Difference]: Without dead ends: 131308 [2021-03-10 21:30:02,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:30:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-03-10 21:30:04,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131087. [2021-03-10 21:30:04,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131087 states, 131086 states have (on average 3.028195230611965) internal successors, (396954), 131086 states have internal predecessors, (396954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131087 states to 131087 states and 396954 transitions. [2021-03-10 21:30:04,889 INFO L78 Accepts]: Start accepts. Automaton has 131087 states and 396954 transitions. Word has length 24 [2021-03-10 21:30:04,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:04,889 INFO L480 AbstractCegarLoop]: Abstraction has 131087 states and 396954 transitions. [2021-03-10 21:30:04,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:30:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 131087 states and 396954 transitions. [2021-03-10 21:30:04,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:04,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:04,931 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:05,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10593,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:05,132 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:05,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:05,132 INFO L82 PathProgramCache]: Analyzing trace with hash 917914134, now seen corresponding path program 297 times [2021-03-10 21:30:05,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:05,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803841255] [2021-03-10 21:30:05,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:05,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803841255] [2021-03-10 21:30:05,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398375228] [2021-03-10 21:30:05,223 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:05,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:30:05,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:05,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:30:05,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:05,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:05,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:30:05,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455518208] [2021-03-10 21:30:05,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:05,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:05,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:05,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:05,291 INFO L87 Difference]: Start difference. First operand 131087 states and 396954 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:30:06,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:06,338 INFO L93 Difference]: Finished difference Result 131552 states and 397896 transitions. [2021-03-10 21:30:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:30:06,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-03-10 21:30:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:06,594 INFO L225 Difference]: With dead ends: 131552 [2021-03-10 21:30:06,594 INFO L226 Difference]: Without dead ends: 131544 [2021-03-10 21:30:06,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:30:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131544 states. [2021-03-10 21:30:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131544 to 131094. [2021-03-10 21:30:08,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131094 states, 131093 states have (on average 3.0281555842035806) internal successors, (396970), 131093 states have internal predecessors, (396970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131094 states to 131094 states and 396970 transitions. [2021-03-10 21:30:08,843 INFO L78 Accepts]: Start accepts. Automaton has 131094 states and 396970 transitions. Word has length 24 [2021-03-10 21:30:08,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:08,843 INFO L480 AbstractCegarLoop]: Abstraction has 131094 states and 396970 transitions. [2021-03-10 21:30:08,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:30:08,843 INFO L276 IsEmpty]: Start isEmpty. Operand 131094 states and 396970 transitions. [2021-03-10 21:30:08,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:08,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:08,884 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:09,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10594,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:09,084 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:09,084 INFO L82 PathProgramCache]: Analyzing trace with hash 52834514, now seen corresponding path program 298 times [2021-03-10 21:30:09,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:09,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544219105] [2021-03-10 21:30:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:30:09,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544219105] [2021-03-10 21:30:09,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126480923] [2021-03-10 21:30:09,146 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:09,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:09,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:09,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:30:09,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:30:09,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:09,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:30:09,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023826702] [2021-03-10 21:30:09,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:30:09,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:09,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:30:09,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:30:09,214 INFO L87 Difference]: Start difference. First operand 131094 states and 396970 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:30:09,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:09,711 INFO L93 Difference]: Finished difference Result 131378 states and 397470 transitions. [2021-03-10 21:30:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:30:09,712 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 24 [2021-03-10 21:30:09,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:09,969 INFO L225 Difference]: With dead ends: 131378 [2021-03-10 21:30:09,969 INFO L226 Difference]: Without dead ends: 131378 [2021-03-10 21:30:09,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131378 states. [2021-03-10 21:30:12,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131378 to 131115. [2021-03-10 21:30:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0280900590325976) internal successors, (397025), 131114 states have internal predecessors, (397025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 397025 transitions. [2021-03-10 21:30:12,923 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 397025 transitions. Word has length 24 [2021-03-10 21:30:12,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:12,924 INFO L480 AbstractCegarLoop]: Abstraction has 131115 states and 397025 transitions. [2021-03-10 21:30:12,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:30:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 397025 transitions. [2021-03-10 21:30:12,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:12,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:12,963 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:13,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10595 [2021-03-10 21:30:13,163 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:13,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:13,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289204, now seen corresponding path program 299 times [2021-03-10 21:30:13,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:13,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414711927] [2021-03-10 21:30:13,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:30:13,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414711927] [2021-03-10 21:30:13,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717944764] [2021-03-10 21:30:13,232 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:13,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:30:13,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:13,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:30:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:30:13,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:13,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:30:13,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245166755] [2021-03-10 21:30:13,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:30:13,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:13,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:30:13,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:30:13,303 INFO L87 Difference]: Start difference. First operand 131115 states and 397025 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) 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 21:30:13,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:13,827 INFO L93 Difference]: Finished difference Result 131464 states and 397561 transitions. [2021-03-10 21:30:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:30:13,827 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) 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 24 [2021-03-10 21:30:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:14,077 INFO L225 Difference]: With dead ends: 131464 [2021-03-10 21:30:14,077 INFO L226 Difference]: Without dead ends: 131461 [2021-03-10 21:30:14,077 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:30:14,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131461 states. [2021-03-10 21:30:16,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131461 to 131127. [2021-03-10 21:30:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131127 states, 131126 states have (on average 3.0277290544972013) internal successors, (397014), 131126 states have internal predecessors, (397014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131127 states to 131127 states and 397014 transitions. [2021-03-10 21:30:16,686 INFO L78 Accepts]: Start accepts. Automaton has 131127 states and 397014 transitions. Word has length 24 [2021-03-10 21:30:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:16,686 INFO L480 AbstractCegarLoop]: Abstraction has 131127 states and 397014 transitions. [2021-03-10 21:30:16,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) 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 21:30:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 131127 states and 397014 transitions. [2021-03-10 21:30:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:17,054 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:17,054 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:17,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10596 [2021-03-10 21:30:17,254 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:17,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:17,254 INFO L82 PathProgramCache]: Analyzing trace with hash 703340212, now seen corresponding path program 300 times [2021-03-10 21:30:17,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:17,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650216359] [2021-03-10 21:30:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:17,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650216359] [2021-03-10 21:30:17,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875913932] [2021-03-10 21:30:17,325 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:17,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:30:17,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:17,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:30:17,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:17,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:17,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:30:17,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002965614] [2021-03-10 21:30:17,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:30:17,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:17,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:30:17,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:30:17,390 INFO L87 Difference]: Start difference. First operand 131127 states and 397014 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:30:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:17,972 INFO L93 Difference]: Finished difference Result 131365 states and 397357 transitions. [2021-03-10 21:30:17,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:30:17,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 24 [2021-03-10 21:30:17,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:18,221 INFO L225 Difference]: With dead ends: 131365 [2021-03-10 21:30:18,221 INFO L226 Difference]: Without dead ends: 131358 [2021-03-10 21:30:18,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:30:18,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131358 states. [2021-03-10 21:30:20,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131358 to 131081. [2021-03-10 21:30:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131081 states, 131080 states have (on average 3.0275785779676534) internal successors, (396855), 131080 states have internal predecessors, (396855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131081 states to 131081 states and 396855 transitions. [2021-03-10 21:30:20,764 INFO L78 Accepts]: Start accepts. Automaton has 131081 states and 396855 transitions. Word has length 24 [2021-03-10 21:30:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:20,764 INFO L480 AbstractCegarLoop]: Abstraction has 131081 states and 396855 transitions. [2021-03-10 21:30:20,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:30:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 131081 states and 396855 transitions. [2021-03-10 21:30:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:20,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:20,805 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:21,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10597 [2021-03-10 21:30:21,006 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:21,006 INFO L82 PathProgramCache]: Analyzing trace with hash -369745168, now seen corresponding path program 301 times [2021-03-10 21:30:21,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:21,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985181337] [2021-03-10 21:30:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:21,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985181337] [2021-03-10 21:30:21,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552845081] [2021-03-10 21:30:21,086 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:21,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:30:21,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:30:21,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:21,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-03-10 21:30:21,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557914048] [2021-03-10 21:30:21,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:21,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:21,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:21,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:21,152 INFO L87 Difference]: Start difference. First operand 131081 states and 396855 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:30:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:22,108 INFO L93 Difference]: Finished difference Result 131320 states and 397204 transitions. [2021-03-10 21:30:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:30:22,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 24 [2021-03-10 21:30:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:22,365 INFO L225 Difference]: With dead ends: 131320 [2021-03-10 21:30:22,365 INFO L226 Difference]: Without dead ends: 131315 [2021-03-10 21:30:22,365 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:30:22,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131315 states. [2021-03-10 21:30:24,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131315 to 131074. [2021-03-10 21:30:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131074 states, 131073 states have (on average 3.0273053947037147) internal successors, (396798), 131073 states have internal predecessors, (396798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131074 states to 131074 states and 396798 transitions. [2021-03-10 21:30:24,859 INFO L78 Accepts]: Start accepts. Automaton has 131074 states and 396798 transitions. Word has length 24 [2021-03-10 21:30:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:24,859 INFO L480 AbstractCegarLoop]: Abstraction has 131074 states and 396798 transitions. [2021-03-10 21:30:24,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:30:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 131074 states and 396798 transitions. [2021-03-10 21:30:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:24,899 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:24,899 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:25,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10598,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:25,100 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:25,100 INFO L82 PathProgramCache]: Analyzing trace with hash 724346420, now seen corresponding path program 302 times [2021-03-10 21:30:25,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:25,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966775694] [2021-03-10 21:30:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:25,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966775694] [2021-03-10 21:30:25,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386990775] [2021-03-10 21:30:25,194 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 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:25,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:25,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:25,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:30:25,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:30:25,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:25,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-03-10 21:30:25,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678903733] [2021-03-10 21:30:25,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:30:25,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:25,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:30:25,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:30:25,261 INFO L87 Difference]: Start difference. First operand 131074 states and 396798 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:30:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:26,258 INFO L93 Difference]: Finished difference Result 131318 states and 397153 transitions. [2021-03-10 21:30:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:30:26,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:30:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:26,490 INFO L225 Difference]: With dead ends: 131318 [2021-03-10 21:30:26,490 INFO L226 Difference]: Without dead ends: 131312 [2021-03-10 21:30:26,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=317, Invalid=675, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:30:26,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131312 states. [2021-03-10 21:30:28,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131312 to 131075. [2021-03-10 21:30:28,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131075 states, 131074 states have (on average 3.026984756702321) internal successors, (396759), 131074 states have internal predecessors, (396759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131075 states to 131075 states and 396759 transitions. [2021-03-10 21:30:28,887 INFO L78 Accepts]: Start accepts. Automaton has 131075 states and 396759 transitions. Word has length 24 [2021-03-10 21:30:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:28,887 INFO L480 AbstractCegarLoop]: Abstraction has 131075 states and 396759 transitions. [2021-03-10 21:30:28,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:30:28,888 INFO L276 IsEmpty]: Start isEmpty. Operand 131075 states and 396759 transitions. [2021-03-10 21:30:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:28,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:28,928 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:29,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10599 [2021-03-10 21:30:29,128 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:29,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:29,128 INFO L82 PathProgramCache]: Analyzing trace with hash 281447280, now seen corresponding path program 303 times [2021-03-10 21:30:29,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:29,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588975126] [2021-03-10 21:30:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:29,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588975126] [2021-03-10 21:30:29,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395587840] [2021-03-10 21:30:29,230 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:29,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:30:29,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:29,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:30:29,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:29,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:29,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:30:29,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443650570] [2021-03-10 21:30:29,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:30:29,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:29,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:30:29,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:30:29,302 INFO L87 Difference]: Start difference. First operand 131075 states and 396759 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:30:30,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:30,321 INFO L93 Difference]: Finished difference Result 131674 states and 397979 transitions. [2021-03-10 21:30:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:30:30,335 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 24 [2021-03-10 21:30:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:30,568 INFO L225 Difference]: With dead ends: 131674 [2021-03-10 21:30:30,568 INFO L226 Difference]: Without dead ends: 131666 [2021-03-10 21:30:30,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:30:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131666 states. [2021-03-10 21:30:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131666 to 131083. [2021-03-10 21:30:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131083 states, 131082 states have (on average 3.026937336934133) internal successors, (396777), 131082 states have internal predecessors, (396777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131083 states to 131083 states and 396777 transitions. [2021-03-10 21:30:32,952 INFO L78 Accepts]: Start accepts. Automaton has 131083 states and 396777 transitions. Word has length 24 [2021-03-10 21:30:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:32,952 INFO L480 AbstractCegarLoop]: Abstraction has 131083 states and 396777 transitions. [2021-03-10 21:30:32,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:30:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 131083 states and 396777 transitions. [2021-03-10 21:30:32,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:32,992 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:32,992 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:33,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10600 [2021-03-10 21:30:33,193 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:33,193 INFO L82 PathProgramCache]: Analyzing trace with hash -563524172, now seen corresponding path program 304 times [2021-03-10 21:30:33,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:33,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658699405] [2021-03-10 21:30:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:33,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658699405] [2021-03-10 21:30:33,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440246233] [2021-03-10 21:30:33,285 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:33,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:33,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:33,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:30:33,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:30:33,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:33,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-03-10 21:30:33,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684432638] [2021-03-10 21:30:33,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:30:33,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:33,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:30:33,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:30:33,352 INFO L87 Difference]: Start difference. First operand 131083 states and 396777 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:30:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:33,989 INFO L93 Difference]: Finished difference Result 131661 states and 397955 transitions. [2021-03-10 21:30:33,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:30:33,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:30:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:34,233 INFO L225 Difference]: With dead ends: 131661 [2021-03-10 21:30:34,233 INFO L226 Difference]: Without dead ends: 131646 [2021-03-10 21:30:34,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:30:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131646 states. [2021-03-10 21:30:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131646 to 131092. [2021-03-10 21:30:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131092 states, 131091 states have (on average 3.0268515763858694) internal successors, (396793), 131091 states have internal predecessors, (396793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:36,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131092 states to 131092 states and 396793 transitions. [2021-03-10 21:30:36,966 INFO L78 Accepts]: Start accepts. Automaton has 131092 states and 396793 transitions. Word has length 24 [2021-03-10 21:30:36,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:36,966 INFO L480 AbstractCegarLoop]: Abstraction has 131092 states and 396793 transitions. [2021-03-10 21:30:36,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:30:36,966 INFO L276 IsEmpty]: Start isEmpty. Operand 131092 states and 396793 transitions. [2021-03-10 21:30:37,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:37,007 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:37,007 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:37,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10601 [2021-03-10 21:30:37,207 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:37,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:37,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1182382632, now seen corresponding path program 305 times [2021-03-10 21:30:37,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:37,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536276980] [2021-03-10 21:30:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:37,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536276980] [2021-03-10 21:30:37,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216095951] [2021-03-10 21:30:37,292 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:37,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:30:37,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:37,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:30:37,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:37,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:37,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:30:37,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911572032] [2021-03-10 21:30:37,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:37,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:37,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:37,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:37,358 INFO L87 Difference]: Start difference. First operand 131092 states and 396793 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:30:37,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:37,943 INFO L93 Difference]: Finished difference Result 131394 states and 397427 transitions. [2021-03-10 21:30:37,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:30:37,943 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-03-10 21:30:37,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:38,184 INFO L225 Difference]: With dead ends: 131394 [2021-03-10 21:30:38,185 INFO L226 Difference]: Without dead ends: 131390 [2021-03-10 21:30:38,185 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:30:38,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131390 states. [2021-03-10 21:30:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131390 to 131082. [2021-03-10 21:30:40,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0267544495388345) internal successors, (396750), 131081 states have internal predecessors, (396750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 396750 transitions. [2021-03-10 21:30:41,040 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 396750 transitions. Word has length 24 [2021-03-10 21:30:41,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:41,040 INFO L480 AbstractCegarLoop]: Abstraction has 131082 states and 396750 transitions. [2021-03-10 21:30:41,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:30:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 396750 transitions. [2021-03-10 21:30:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:41,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:41,076 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:41,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10602 [2021-03-10 21:30:41,276 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:41,277 INFO L82 PathProgramCache]: Analyzing trace with hash 545915778, now seen corresponding path program 306 times [2021-03-10 21:30:41,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:41,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139376557] [2021-03-10 21:30:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:41,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139376557] [2021-03-10 21:30:41,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424569424] [2021-03-10 21:30:41,360 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:41,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:30:41,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:41,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:30:41,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:41,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:41,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:30:41,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638735388] [2021-03-10 21:30:41,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:30:41,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:41,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:30:41,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:30:41,434 INFO L87 Difference]: Start difference. First operand 131082 states and 396750 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:30:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:42,034 INFO L93 Difference]: Finished difference Result 131351 states and 397199 transitions. [2021-03-10 21:30:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:30:42,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 24 [2021-03-10 21:30:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:42,272 INFO L225 Difference]: With dead ends: 131351 [2021-03-10 21:30:42,273 INFO L226 Difference]: Without dead ends: 131347 [2021-03-10 21:30:42,273 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:30:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131347 states. [2021-03-10 21:30:44,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131347 to 131079. [2021-03-10 21:30:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0264804162407115) internal successors, (396705), 131078 states have internal predecessors, (396705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:44,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 396705 transitions. [2021-03-10 21:30:44,903 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 396705 transitions. Word has length 24 [2021-03-10 21:30:44,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:44,903 INFO L480 AbstractCegarLoop]: Abstraction has 131079 states and 396705 transitions. [2021-03-10 21:30:44,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:30:44,903 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 396705 transitions. [2021-03-10 21:30:44,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:44,953 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:44,953 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:45,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10603,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:45,154 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:45,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:45,154 INFO L82 PathProgramCache]: Analyzing trace with hash -299055674, now seen corresponding path program 307 times [2021-03-10 21:30:45,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:45,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168257201] [2021-03-10 21:30:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:45,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168257201] [2021-03-10 21:30:45,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588489221] [2021-03-10 21:30:45,242 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:45,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:30:45,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:30:45,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:45,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-03-10 21:30:45,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976667609] [2021-03-10 21:30:45,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:30:45,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:45,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:30:45,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:30:45,309 INFO L87 Difference]: Start difference. First operand 131079 states and 396705 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:30:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:46,333 INFO L93 Difference]: Finished difference Result 131763 states and 398113 transitions. [2021-03-10 21:30:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:30:46,334 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:30:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:46,570 INFO L225 Difference]: With dead ends: 131763 [2021-03-10 21:30:46,570 INFO L226 Difference]: Without dead ends: 131748 [2021-03-10 21:30:46,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:30:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131748 states. [2021-03-10 21:30:48,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131748 to 131119. [2021-03-10 21:30:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131119 states, 131118 states have (on average 3.0261825226132184) internal successors, (396787), 131118 states have internal predecessors, (396787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131119 states to 131119 states and 396787 transitions. [2021-03-10 21:30:48,922 INFO L78 Accepts]: Start accepts. Automaton has 131119 states and 396787 transitions. Word has length 24 [2021-03-10 21:30:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:48,922 INFO L480 AbstractCegarLoop]: Abstraction has 131119 states and 396787 transitions. [2021-03-10 21:30:48,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:30:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 131119 states and 396787 transitions. [2021-03-10 21:30:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:48,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:48,963 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:49,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10604 [2021-03-10 21:30:49,163 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:49,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:49,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2061667018, now seen corresponding path program 308 times [2021-03-10 21:30:49,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:49,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834700025] [2021-03-10 21:30:49,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:30:49,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834700025] [2021-03-10 21:30:49,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107613017] [2021-03-10 21:30:49,221 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:49,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:49,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:49,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:30:49,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:30:49,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:49,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:30:49,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376809846] [2021-03-10 21:30:49,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:30:49,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:49,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:30:49,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:30:49,298 INFO L87 Difference]: Start difference. First operand 131119 states and 396787 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) 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 21:30:49,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:49,835 INFO L93 Difference]: Finished difference Result 131485 states and 397395 transitions. [2021-03-10 21:30:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:30:49,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) 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 24 [2021-03-10 21:30:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:50,544 INFO L225 Difference]: With dead ends: 131485 [2021-03-10 21:30:50,544 INFO L226 Difference]: Without dead ends: 131485 [2021-03-10 21:30:50,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:30:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131485 states. [2021-03-10 21:30:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131485 to 131093. [2021-03-10 21:30:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.025852073353065) internal successors, (396665), 131092 states have internal predecessors, (396665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 396665 transitions. [2021-03-10 21:30:52,820 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 396665 transitions. Word has length 24 [2021-03-10 21:30:52,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:52,820 INFO L480 AbstractCegarLoop]: Abstraction has 131093 states and 396665 transitions. [2021-03-10 21:30:52,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) 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 21:30:52,820 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 396665 transitions. [2021-03-10 21:30:52,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:52,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:52,860 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:53,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10605,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:53,060 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:53,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:53,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1582794580, now seen corresponding path program 309 times [2021-03-10 21:30:53,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:53,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923122766] [2021-03-10 21:30:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:53,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923122766] [2021-03-10 21:30:53,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304984732] [2021-03-10 21:30:53,136 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 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:30:53,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:30:53,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:53,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:30:53,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:53,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:53,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:30:53,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196566661] [2021-03-10 21:30:53,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:30:53,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:53,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:30:53,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:30:53,203 INFO L87 Difference]: Start difference. First operand 131093 states and 396665 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:30:53,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:53,780 INFO L93 Difference]: Finished difference Result 131333 states and 397012 transitions. [2021-03-10 21:30:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:30:53,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 24 [2021-03-10 21:30:53,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:54,017 INFO L225 Difference]: With dead ends: 131333 [2021-03-10 21:30:54,017 INFO L226 Difference]: Without dead ends: 131328 [2021-03-10 21:30:54,017 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:30:54,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131328 states. [2021-03-10 21:30:56,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131328 to 131072. [2021-03-10 21:30:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0252458591145257) internal successors, (396522), 131071 states have internal predecessors, (396522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396522 transitions. [2021-03-10 21:30:56,801 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396522 transitions. Word has length 24 [2021-03-10 21:30:56,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:56,801 INFO L480 AbstractCegarLoop]: Abstraction has 131072 states and 396522 transitions. [2021-03-10 21:30:56,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21:30:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396522 transitions. [2021-03-10 21:30:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:30:56,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:56,834 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:57,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10606,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:57,034 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1639087336, now seen corresponding path program 310 times [2021-03-10 21:30:57,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:57,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338677499] [2021-03-10 21:30:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:57,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338677499] [2021-03-10 21:30:57,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513980028] [2021-03-10 21:30:57,106 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 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:57,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:57,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:57,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:30:57,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:30:57,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:57,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-03-10 21:30:57,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777838910] [2021-03-10 21:30:57,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:57,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:57,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:57,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:57,172 INFO L87 Difference]: Start difference. First operand 131072 states and 396522 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:30:57,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:57,729 INFO L93 Difference]: Finished difference Result 131314 states and 396874 transitions. [2021-03-10 21:30:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:30:57,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 24 [2021-03-10 21:30:57,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:57,966 INFO L225 Difference]: With dead ends: 131314 [2021-03-10 21:30:57,966 INFO L226 Difference]: Without dead ends: 131309 [2021-03-10 21:30:57,966 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:30:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131309 states. [2021-03-10 21:31:00,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131309 to 131072. [2021-03-10 21:31:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.024261659711149) internal successors, (396393), 131071 states have internal predecessors, (396393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396393 transitions. [2021-03-10 21:31:00,485 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396393 transitions. Word has length 24 [2021-03-10 21:31:00,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:00,486 INFO L480 AbstractCegarLoop]: Abstraction has 131072 states and 396393 transitions. [2021-03-10 21:31:00,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:31:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396393 transitions. [2021-03-10 21:31:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:00,837 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:00,837 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:01,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10607,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:01,051 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:01,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:01,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1561788372, now seen corresponding path program 311 times [2021-03-10 21:31:01,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:01,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526438442] [2021-03-10 21:31:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:01,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526438442] [2021-03-10 21:31:01,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659282215] [2021-03-10 21:31:01,133 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 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:01,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:31:01,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:01,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:31:01,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:01,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:01,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:31:01,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469101632] [2021-03-10 21:31:01,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:01,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:01,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:01,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:01,217 INFO L87 Difference]: Start difference. First operand 131072 states and 396393 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:31:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:01,818 INFO L93 Difference]: Finished difference Result 132743 states and 399958 transitions. [2021-03-10 21:31:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:01,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-03-10 21:31:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:02,092 INFO L225 Difference]: With dead ends: 132743 [2021-03-10 21:31:02,092 INFO L226 Difference]: Without dead ends: 132740 [2021-03-10 21:31:02,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:31:02,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-03-10 21:31:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131072. [2021-03-10 21:31:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0241853651837554) internal successors, (396383), 131071 states have internal predecessors, (396383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396383 transitions. [2021-03-10 21:31:04,557 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396383 transitions. Word has length 24 [2021-03-10 21:31:04,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:04,557 INFO L480 AbstractCegarLoop]: Abstraction has 131072 states and 396383 transitions. [2021-03-10 21:31:04,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:31:04,557 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396383 transitions. [2021-03-10 21:31:04,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:04,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:04,598 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:04,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10608,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:04,798 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:04,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:04,798 INFO L82 PathProgramCache]: Analyzing trace with hash -2004687512, now seen corresponding path program 312 times [2021-03-10 21:31:04,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:04,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003536268] [2021-03-10 21:31:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:04,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003536268] [2021-03-10 21:31:04,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784527349] [2021-03-10 21:31:04,884 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 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:04,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:31:04,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:31:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:04,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:04,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:31:04,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868603029] [2021-03-10 21:31:04,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:04,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:04,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:04,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:04,956 INFO L87 Difference]: Start difference. First operand 131072 states and 396383 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:31:05,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:05,833 INFO L93 Difference]: Finished difference Result 132748 states and 399952 transitions. [2021-03-10 21:31:05,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:31:05,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 24 [2021-03-10 21:31:05,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:06,074 INFO L225 Difference]: With dead ends: 132748 [2021-03-10 21:31:06,074 INFO L226 Difference]: Without dead ends: 132740 [2021-03-10 21:31:06,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:06,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-03-10 21:31:08,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131124. [2021-03-10 21:31:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.0238097053911215) internal successors, (396491), 131123 states have internal predecessors, (396491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396491 transitions. [2021-03-10 21:31:08,483 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396491 transitions. Word has length 24 [2021-03-10 21:31:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:08,483 INFO L480 AbstractCegarLoop]: Abstraction has 131124 states and 396491 transitions. [2021-03-10 21:31:08,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:31:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396491 transitions. [2021-03-10 21:31:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:08,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:08,523 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:08,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10609,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:08,723 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:08,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:08,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1445308332, now seen corresponding path program 313 times [2021-03-10 21:31:08,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:08,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725180171] [2021-03-10 21:31:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:08,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725180171] [2021-03-10 21:31:08,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958098071] [2021-03-10 21:31:08,813 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 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:08,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:31:08,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:31:08,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:08,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-03-10 21:31:08,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320107948] [2021-03-10 21:31:08,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:08,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:08,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:08,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:08,881 INFO L87 Difference]: Start difference. First operand 131124 states and 396491 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:31:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:09,860 INFO L93 Difference]: Finished difference Result 131783 states and 397838 transitions. [2021-03-10 21:31:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:09,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:31:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:10,097 INFO L225 Difference]: With dead ends: 131783 [2021-03-10 21:31:10,097 INFO L226 Difference]: Without dead ends: 131778 [2021-03-10 21:31:10,097 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131778 states. [2021-03-10 21:31:12,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131778 to 131124. [2021-03-10 21:31:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.023794452536931) internal successors, (396489), 131123 states have internal predecessors, (396489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396489 transitions. [2021-03-10 21:31:12,440 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396489 transitions. Word has length 24 [2021-03-10 21:31:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:12,441 INFO L480 AbstractCegarLoop]: Abstraction has 131124 states and 396489 transitions. [2021-03-10 21:31:12,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:31:12,441 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396489 transitions. [2021-03-10 21:31:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:12,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:12,480 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:12,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10610,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:12,681 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1020997096, now seen corresponding path program 314 times [2021-03-10 21:31:12,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:12,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023474403] [2021-03-10 21:31:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:12,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023474403] [2021-03-10 21:31:12,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054607912] [2021-03-10 21:31:12,779 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 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:12,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:12,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:12,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:31:12,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:31:12,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:12,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-03-10 21:31:12,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99207795] [2021-03-10 21:31:12,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:12,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:12,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:12,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:12,848 INFO L87 Difference]: Start difference. First operand 131124 states and 396489 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:31:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:13,828 INFO L93 Difference]: Finished difference Result 131712 states and 397702 transitions. [2021-03-10 21:31:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:31:13,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:31:13,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:14,075 INFO L225 Difference]: With dead ends: 131712 [2021-03-10 21:31:14,075 INFO L226 Difference]: Without dead ends: 131706 [2021-03-10 21:31:14,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131706 states. [2021-03-10 21:31:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131706 to 131124. [2021-03-10 21:31:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.023779199682741) internal successors, (396487), 131123 states have internal predecessors, (396487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396487 transitions. [2021-03-10 21:31:16,289 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396487 transitions. Word has length 24 [2021-03-10 21:31:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:16,289 INFO L480 AbstractCegarLoop]: Abstraction has 131124 states and 396487 transitions. [2021-03-10 21:31:16,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:31:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396487 transitions. [2021-03-10 21:31:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:16,330 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:16,330 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:16,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10611,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:16,531 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash -690466828, now seen corresponding path program 315 times [2021-03-10 21:31:16,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:16,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521317030] [2021-03-10 21:31:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:16,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521317030] [2021-03-10 21:31:16,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633546994] [2021-03-10 21:31:16,630 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 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:16,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:31:16,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:16,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:31:16,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:16,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:16,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:31:16,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514117114] [2021-03-10 21:31:16,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:16,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:16,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:16,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:16,702 INFO L87 Difference]: Start difference. First operand 131124 states and 396487 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:31:17,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:17,296 INFO L93 Difference]: Finished difference Result 131475 states and 397232 transitions. [2021-03-10 21:31:17,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:17,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 24 [2021-03-10 21:31:17,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:17,535 INFO L225 Difference]: With dead ends: 131475 [2021-03-10 21:31:17,535 INFO L226 Difference]: Without dead ends: 131470 [2021-03-10 21:31:17,535 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-03-10 21:31:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131115. [2021-03-10 21:31:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0236435468371035) internal successors, (396442), 131114 states have internal predecessors, (396442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 396442 transitions. [2021-03-10 21:31:20,294 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 396442 transitions. Word has length 24 [2021-03-10 21:31:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:20,294 INFO L480 AbstractCegarLoop]: Abstraction has 131115 states and 396442 transitions. [2021-03-10 21:31:20,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:31:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 396442 transitions. [2021-03-10 21:31:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:20,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:20,335 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:20,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10612 [2021-03-10 21:31:20,536 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:20,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1053897178, now seen corresponding path program 316 times [2021-03-10 21:31:20,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:20,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856669827] [2021-03-10 21:31:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:20,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856669827] [2021-03-10 21:31:20,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786236590] [2021-03-10 21:31:20,631 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 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:20,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:20,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:20,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:31:20,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:31:20,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:20,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-03-10 21:31:20,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777042600] [2021-03-10 21:31:20,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:20,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:20,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:20,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:20,692 INFO L87 Difference]: Start difference. First operand 131115 states and 396442 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:31:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:21,271 INFO L93 Difference]: Finished difference Result 132301 states and 398883 transitions. [2021-03-10 21:31:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:21,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:31:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:21,508 INFO L225 Difference]: With dead ends: 132301 [2021-03-10 21:31:21,508 INFO L226 Difference]: Without dead ends: 132286 [2021-03-10 21:31:21,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132286 states. [2021-03-10 21:31:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132286 to 131160. [2021-03-10 21:31:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131160 states, 131159 states have (on average 3.023116980153859) internal successors, (396509), 131159 states have internal predecessors, (396509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131160 states to 131160 states and 396509 transitions. [2021-03-10 21:31:24,364 INFO L78 Accepts]: Start accepts. Automaton has 131160 states and 396509 transitions. Word has length 24 [2021-03-10 21:31:24,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:24,364 INFO L480 AbstractCegarLoop]: Abstraction has 131160 states and 396509 transitions. [2021-03-10 21:31:24,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:31:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 131160 states and 396509 transitions. [2021-03-10 21:31:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:24,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:24,402 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:24,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10613,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:24,602 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:24,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:24,603 INFO L82 PathProgramCache]: Analyzing trace with hash 629585942, now seen corresponding path program 317 times [2021-03-10 21:31:24,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:24,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554405327] [2021-03-10 21:31:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:24,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554405327] [2021-03-10 21:31:24,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971161228] [2021-03-10 21:31:24,703 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 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:24,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:31:24,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:24,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:31:24,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:31:24,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:24,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-03-10 21:31:24,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871427982] [2021-03-10 21:31:24,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:24,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:24,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:24,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:24,769 INFO L87 Difference]: Start difference. First operand 131160 states and 396509 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:31:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:25,320 INFO L93 Difference]: Finished difference Result 131749 states and 397717 transitions. [2021-03-10 21:31:25,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:31:25,321 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:31:25,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:25,557 INFO L225 Difference]: With dead ends: 131749 [2021-03-10 21:31:25,557 INFO L226 Difference]: Without dead ends: 131743 [2021-03-10 21:31:25,557 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131743 states. [2021-03-10 21:31:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131743 to 131160. [2021-03-10 21:31:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131160 states, 131159 states have (on average 3.023109355820035) internal successors, (396508), 131159 states have internal predecessors, (396508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:28,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131160 states to 131160 states and 396508 transitions. [2021-03-10 21:31:28,063 INFO L78 Accepts]: Start accepts. Automaton has 131160 states and 396508 transitions. Word has length 24 [2021-03-10 21:31:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:28,063 INFO L480 AbstractCegarLoop]: Abstraction has 131160 states and 396508 transitions. [2021-03-10 21:31:28,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:31:28,063 INFO L276 IsEmpty]: Start isEmpty. Operand 131160 states and 396508 transitions. [2021-03-10 21:31:28,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:28,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:28,104 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:28,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10614 [2021-03-10 21:31:28,304 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:28,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:28,304 INFO L82 PathProgramCache]: Analyzing trace with hash -89034798, now seen corresponding path program 318 times [2021-03-10 21:31:28,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:28,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706250819] [2021-03-10 21:31:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:31:28,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706250819] [2021-03-10 21:31:28,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219988568] [2021-03-10 21:31:28,683 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 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:28,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:31:28,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:28,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:31:28,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:31:28,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:28,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:31:28,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559620217] [2021-03-10 21:31:28,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:31:28,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:28,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:31:28,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:31:28,757 INFO L87 Difference]: Start difference. First operand 131160 states and 396508 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) 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 21:31:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:29,220 INFO L93 Difference]: Finished difference Result 131436 states and 396919 transitions. [2021-03-10 21:31:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:31:29,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) 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 24 [2021-03-10 21:31:29,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:29,467 INFO L225 Difference]: With dead ends: 131436 [2021-03-10 21:31:29,467 INFO L226 Difference]: Without dead ends: 131434 [2021-03-10 21:31:29,468 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:29,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131434 states. [2021-03-10 21:31:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131434 to 131152. [2021-03-10 21:31:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131152 states, 131151 states have (on average 3.0228438974922036) internal successors, (396449), 131151 states have internal predecessors, (396449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131152 states to 131152 states and 396449 transitions. [2021-03-10 21:31:32,000 INFO L78 Accepts]: Start accepts. Automaton has 131152 states and 396449 transitions. Word has length 24 [2021-03-10 21:31:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:32,000 INFO L480 AbstractCegarLoop]: Abstraction has 131152 states and 396449 transitions. [2021-03-10 21:31:32,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) 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 21:31:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 131152 states and 396449 transitions. [2021-03-10 21:31:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:32,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:32,042 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:32,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10615 [2021-03-10 21:31:32,243 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:32,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:32,243 INFO L82 PathProgramCache]: Analyzing trace with hash 561470900, now seen corresponding path program 319 times [2021-03-10 21:31:32,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:32,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615249683] [2021-03-10 21:31:32,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:32,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615249683] [2021-03-10 21:31:32,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108290079] [2021-03-10 21:31:32,316 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 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:32,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:31:32,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:31:32,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:32,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-03-10 21:31:32,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480376285] [2021-03-10 21:31:32,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:31:32,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:32,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:31:32,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:31:32,378 INFO L87 Difference]: Start difference. First operand 131152 states and 396449 transitions. Second operand has 16 states, 16 states have (on average 1.8125) 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 21:31:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:33,327 INFO L93 Difference]: Finished difference Result 131396 states and 396804 transitions. [2021-03-10 21:31:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:33,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) 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 24 [2021-03-10 21:31:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:33,568 INFO L225 Difference]: With dead ends: 131396 [2021-03-10 21:31:33,568 INFO L226 Difference]: Without dead ends: 131393 [2021-03-10 21:31:33,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:31:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131393 states. [2021-03-10 21:31:35,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131393 to 131141. [2021-03-10 21:31:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0221976513649533) internal successors, (396331), 131140 states have internal predecessors, (396331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396331 transitions. [2021-03-10 21:31:36,084 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396331 transitions. Word has length 24 [2021-03-10 21:31:36,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:36,084 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 396331 transitions. [2021-03-10 21:31:36,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) 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 21:31:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396331 transitions. [2021-03-10 21:31:36,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:36,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:36,132 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:36,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10616,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:36,345 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:36,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:36,345 INFO L82 PathProgramCache]: Analyzing trace with hash -511614480, now seen corresponding path program 320 times [2021-03-10 21:31:36,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:36,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053423421] [2021-03-10 21:31:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:36,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053423421] [2021-03-10 21:31:36,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377116188] [2021-03-10 21:31:36,430 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 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:31:36,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:36,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:36,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:31:36,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:31:36,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:36,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-03-10 21:31:36,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020001486] [2021-03-10 21:31:36,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:36,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:36,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:36,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:36,519 INFO L87 Difference]: Start difference. First operand 131141 states and 396331 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:31:37,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:37,492 INFO L93 Difference]: Finished difference Result 131390 states and 396692 transitions. [2021-03-10 21:31:37,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:31:37,493 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 24 [2021-03-10 21:31:37,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:37,717 INFO L225 Difference]: With dead ends: 131390 [2021-03-10 21:31:37,717 INFO L226 Difference]: Without dead ends: 131385 [2021-03-10 21:31:37,717 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:31:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131385 states. [2021-03-10 21:31:39,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131385 to 131141. [2021-03-10 21:31:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0206191856031723) internal successors, (396124), 131140 states have internal predecessors, (396124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396124 transitions. [2021-03-10 21:31:40,054 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396124 transitions. Word has length 24 [2021-03-10 21:31:40,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:40,055 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 396124 transitions. [2021-03-10 21:31:40,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:31:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396124 transitions. [2021-03-10 21:31:40,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:40,097 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:40,097 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:40,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10617,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:40,298 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:40,298 INFO L82 PathProgramCache]: Analyzing trace with hash 582477108, now seen corresponding path program 321 times [2021-03-10 21:31:40,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:40,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316750634] [2021-03-10 21:31:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:40,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316750634] [2021-03-10 21:31:40,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103622166] [2021-03-10 21:31:40,386 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 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:40,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:31:40,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:40,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:31:40,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:40,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:40,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:31:40,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687502024] [2021-03-10 21:31:40,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:40,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:40,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:40,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:40,458 INFO L87 Difference]: Start difference. First operand 131141 states and 396124 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:31:41,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:41,018 INFO L93 Difference]: Finished difference Result 133913 states and 402552 transitions. [2021-03-10 21:31:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:41,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-03-10 21:31:41,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:41,685 INFO L225 Difference]: With dead ends: 133913 [2021-03-10 21:31:41,685 INFO L226 Difference]: Without dead ends: 133910 [2021-03-10 21:31:41,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:31:41,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133910 states. [2021-03-10 21:31:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133910 to 131141. [2021-03-10 21:31:43,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.020283666310813) internal successors, (396080), 131140 states have internal predecessors, (396080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396080 transitions. [2021-03-10 21:31:43,952 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396080 transitions. Word has length 24 [2021-03-10 21:31:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:43,952 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 396080 transitions. [2021-03-10 21:31:43,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:31:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396080 transitions. [2021-03-10 21:31:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:43,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:43,993 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:44,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10618,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:44,194 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:44,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:44,194 INFO L82 PathProgramCache]: Analyzing trace with hash 139577968, now seen corresponding path program 322 times [2021-03-10 21:31:44,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:44,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179851897] [2021-03-10 21:31:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:44,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179851897] [2021-03-10 21:31:44,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649820595] [2021-03-10 21:31:44,281 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 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:44,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:44,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:44,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:31:44,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:31:44,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:44,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-03-10 21:31:44,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419280729] [2021-03-10 21:31:44,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:44,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:44,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:44,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:44,342 INFO L87 Difference]: Start difference. First operand 131141 states and 396080 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:31:44,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:44,880 INFO L93 Difference]: Finished difference Result 132975 states and 400018 transitions. [2021-03-10 21:31:44,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:31:44,881 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 24 [2021-03-10 21:31:44,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:45,116 INFO L225 Difference]: With dead ends: 132975 [2021-03-10 21:31:45,116 INFO L226 Difference]: Without dead ends: 132971 [2021-03-10 21:31:45,116 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:31:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132971 states. [2021-03-10 21:31:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132971 to 131141. [2021-03-10 21:31:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.020253164556962) internal successors, (396076), 131140 states have internal predecessors, (396076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396076 transitions. [2021-03-10 21:31:47,942 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396076 transitions. Word has length 24 [2021-03-10 21:31:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:47,943 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 396076 transitions. [2021-03-10 21:31:47,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:31:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396076 transitions. [2021-03-10 21:31:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:47,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:47,980 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:48,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10619 [2021-03-10 21:31:48,180 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:48,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:48,180 INFO L82 PathProgramCache]: Analyzing trace with hash -705393484, now seen corresponding path program 323 times [2021-03-10 21:31:48,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:48,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885445592] [2021-03-10 21:31:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:48,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885445592] [2021-03-10 21:31:48,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618504374] [2021-03-10 21:31:48,277 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 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:48,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:31:48,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:48,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:31:48,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:31:48,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:48,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-03-10 21:31:48,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623621454] [2021-03-10 21:31:48,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:48,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:48,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:48,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:48,341 INFO L87 Difference]: Start difference. First operand 131141 states and 396076 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:31:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:48,904 INFO L93 Difference]: Finished difference Result 132986 states and 400023 transitions. [2021-03-10 21:31:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:48,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:31:48,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:49,144 INFO L225 Difference]: With dead ends: 132986 [2021-03-10 21:31:49,145 INFO L226 Difference]: Without dead ends: 132971 [2021-03-10 21:31:49,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:49,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132971 states. [2021-03-10 21:31:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132971 to 131201. [2021-03-10 21:31:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.0197713414634144) internal successors, (396194), 131200 states have internal predecessors, (396194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396194 transitions. [2021-03-10 21:31:51,674 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396194 transitions. Word has length 24 [2021-03-10 21:31:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:51,674 INFO L480 AbstractCegarLoop]: Abstraction has 131201 states and 396194 transitions. [2021-03-10 21:31:51,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:31:51,674 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396194 transitions. [2021-03-10 21:31:52,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:52,050 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:52,050 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:52,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10620,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:52,264 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:52,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1129704720, now seen corresponding path program 324 times [2021-03-10 21:31:52,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:52,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043606863] [2021-03-10 21:31:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:52,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043606863] [2021-03-10 21:31:52,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386729612] [2021-03-10 21:31:52,366 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 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:52,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:31:52,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:52,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:31:52,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:52,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:52,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:31:52,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272139565] [2021-03-10 21:31:52,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:52,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:52,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:52,431 INFO L87 Difference]: Start difference. First operand 131201 states and 396194 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:31:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:53,012 INFO L93 Difference]: Finished difference Result 131929 states and 397683 transitions. [2021-03-10 21:31:53,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:31:53,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 24 [2021-03-10 21:31:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:53,253 INFO L225 Difference]: With dead ends: 131929 [2021-03-10 21:31:53,253 INFO L226 Difference]: Without dead ends: 131923 [2021-03-10 21:31:53,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:53,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131923 states. [2021-03-10 21:31:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131923 to 131201. [2021-03-10 21:31:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.019763719512195) internal successors, (396193), 131200 states have internal predecessors, (396193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396193 transitions. [2021-03-10 21:31:55,718 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396193 transitions. Word has length 24 [2021-03-10 21:31:55,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:55,718 INFO L480 AbstractCegarLoop]: Abstraction has 131201 states and 396193 transitions. [2021-03-10 21:31:55,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:31:55,718 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396193 transitions. [2021-03-10 21:31:55,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:55,758 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:55,758 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:55,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10621 [2021-03-10 21:31:55,958 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:55,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1398451148, now seen corresponding path program 325 times [2021-03-10 21:31:55,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:55,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334405710] [2021-03-10 21:31:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:56,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334405710] [2021-03-10 21:31:56,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717351934] [2021-03-10 21:31:56,067 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 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:56,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:31:56,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:31:56,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:56,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-03-10 21:31:56,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529188768] [2021-03-10 21:31:56,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:56,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:56,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:56,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:56,128 INFO L87 Difference]: Start difference. First operand 131201 states and 396193 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:31:57,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:57,001 INFO L93 Difference]: Finished difference Result 131858 states and 397549 transitions. [2021-03-10 21:31:57,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:31:57,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:31:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:57,242 INFO L225 Difference]: With dead ends: 131858 [2021-03-10 21:31:57,242 INFO L226 Difference]: Without dead ends: 131851 [2021-03-10 21:31:57,243 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 507.7ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131851 states. [2021-03-10 21:31:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131851 to 131201. [2021-03-10 21:31:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.0197560975609754) internal successors, (396192), 131200 states have internal predecessors, (396192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396192 transitions. [2021-03-10 21:31:59,683 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396192 transitions. Word has length 24 [2021-03-10 21:31:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:59,683 INFO L480 AbstractCegarLoop]: Abstraction has 131201 states and 396192 transitions. [2021-03-10 21:31:59,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:31:59,683 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396192 transitions. [2021-03-10 21:31:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:59,725 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:59,725 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:59,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10622 [2021-03-10 21:31:59,925 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:59,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1057585994, now seen corresponding path program 326 times [2021-03-10 21:31:59,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:59,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955870940] [2021-03-10 21:31:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:00,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955870940] [2021-03-10 21:32:00,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756114239] [2021-03-10 21:32:00,007 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 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:00,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:00,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:32:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:00,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:00,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:32:00,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107959405] [2021-03-10 21:32:00,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:32:00,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:00,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:32:00,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:32:00,079 INFO L87 Difference]: Start difference. First operand 131201 states and 396192 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:32:01,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:01,023 INFO L93 Difference]: Finished difference Result 131376 states and 396488 transitions. [2021-03-10 21:32:01,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:32:01,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 24 [2021-03-10 21:32:01,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:01,268 INFO L225 Difference]: With dead ends: 131376 [2021-03-10 21:32:01,268 INFO L226 Difference]: Without dead ends: 131372 [2021-03-10 21:32:01,268 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:32:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131372 states. [2021-03-10 21:32:03,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131372 to 131153. [2021-03-10 21:32:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131153 states, 131152 states have (on average 3.0198014517506406) internal successors, (396053), 131152 states have internal predecessors, (396053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131153 states to 131153 states and 396053 transitions. [2021-03-10 21:32:03,636 INFO L78 Accepts]: Start accepts. Automaton has 131153 states and 396053 transitions. Word has length 24 [2021-03-10 21:32:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:03,636 INFO L480 AbstractCegarLoop]: Abstraction has 131153 states and 396053 transitions. [2021-03-10 21:32:03,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21:32:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 131153 states and 396053 transitions. [2021-03-10 21:32:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:03,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:03,677 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:03,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10623,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:03,877 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:03,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:03,878 INFO L82 PathProgramCache]: Analyzing trace with hash 257571116, now seen corresponding path program 327 times [2021-03-10 21:32:03,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:03,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139980083] [2021-03-10 21:32:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:03,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139980083] [2021-03-10 21:32:03,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148693119] [2021-03-10 21:32:03,958 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 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:03,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:32:03,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:03,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:32:03,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:04,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:04,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:32:04,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181392002] [2021-03-10 21:32:04,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:32:04,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:04,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:32:04,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:32:04,026 INFO L87 Difference]: Start difference. First operand 131153 states and 396053 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:32:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:05,001 INFO L93 Difference]: Finished difference Result 131624 states and 397009 transitions. [2021-03-10 21:32:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:32:05,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 24 [2021-03-10 21:32:05,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:05,252 INFO L225 Difference]: With dead ends: 131624 [2021-03-10 21:32:05,252 INFO L226 Difference]: Without dead ends: 131621 [2021-03-10 21:32:05,252 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:32:05,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131621 states. [2021-03-10 21:32:07,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131621 to 131141. [2021-03-10 21:32:07,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0196278786030195) internal successors, (395994), 131140 states have internal predecessors, (395994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:07,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 395994 transitions. [2021-03-10 21:32:07,486 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 395994 transitions. Word has length 24 [2021-03-10 21:32:07,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:07,486 INFO L480 AbstractCegarLoop]: Abstraction has 131141 states and 395994 transitions. [2021-03-10 21:32:07,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:32:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 395994 transitions. [2021-03-10 21:32:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:07,528 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:07,528 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:07,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10624 [2021-03-10 21:32:07,729 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash -185328024, now seen corresponding path program 328 times [2021-03-10 21:32:07,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:07,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462799452] [2021-03-10 21:32:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:07,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462799452] [2021-03-10 21:32:07,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016869850] [2021-03-10 21:32:07,816 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 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:07,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:07,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:32:07,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:32:07,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:07,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-03-10 21:32:07,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986861548] [2021-03-10 21:32:07,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:32:07,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:07,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:32:07,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:07,879 INFO L87 Difference]: Start difference. First operand 131141 states and 395994 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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 21:32:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:08,440 INFO L93 Difference]: Finished difference Result 131617 states and 396954 transitions. [2021-03-10 21:32:08,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:32:08,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 24 [2021-03-10 21:32:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:08,682 INFO L225 Difference]: With dead ends: 131617 [2021-03-10 21:32:08,682 INFO L226 Difference]: Without dead ends: 131609 [2021-03-10 21:32:08,682 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131609 states. [2021-03-10 21:32:11,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131609 to 131143. [2021-03-10 21:32:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131143 states, 131142 states have (on average 3.01929969041192) internal successors, (395957), 131142 states have internal predecessors, (395957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131143 states to 131143 states and 395957 transitions. [2021-03-10 21:32:11,507 INFO L78 Accepts]: Start accepts. Automaton has 131143 states and 395957 transitions. Word has length 24 [2021-03-10 21:32:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:11,507 INFO L480 AbstractCegarLoop]: Abstraction has 131143 states and 395957 transitions. [2021-03-10 21:32:11,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:32:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 131143 states and 395957 transitions. [2021-03-10 21:32:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:11,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:11,550 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:11,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10625,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:11,750 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:11,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:11,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1030299476, now seen corresponding path program 329 times [2021-03-10 21:32:11,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:11,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768757761] [2021-03-10 21:32:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:11,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768757761] [2021-03-10 21:32:11,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619245353] [2021-03-10 21:32:11,839 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 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:11,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:32:11,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:11,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:32:11,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:32:11,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:11,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-03-10 21:32:11,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072991222] [2021-03-10 21:32:11,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:32:11,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:11,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:32:11,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:11,903 INFO L87 Difference]: Start difference. First operand 131143 states and 395957 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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 21:32:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:12,484 INFO L93 Difference]: Finished difference Result 131841 states and 397374 transitions. [2021-03-10 21:32:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:32:12,485 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 24 [2021-03-10 21:32:12,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:12,729 INFO L225 Difference]: With dead ends: 131841 [2021-03-10 21:32:12,729 INFO L226 Difference]: Without dead ends: 131836 [2021-03-10 21:32:12,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131836 states. [2021-03-10 21:32:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131836 to 131145. [2021-03-10 21:32:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131145 states, 131144 states have (on average 3.0192765204660525) internal successors, (395960), 131144 states have internal predecessors, (395960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131145 states to 131145 states and 395960 transitions. [2021-03-10 21:32:15,562 INFO L78 Accepts]: Start accepts. Automaton has 131145 states and 395960 transitions. Word has length 24 [2021-03-10 21:32:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:15,562 INFO L480 AbstractCegarLoop]: Abstraction has 131145 states and 395960 transitions. [2021-03-10 21:32:15,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 21:32:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 131145 states and 395960 transitions. [2021-03-10 21:32:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:15,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:15,602 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:15,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10626 [2021-03-10 21:32:15,802 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:15,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:15,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1454610712, now seen corresponding path program 330 times [2021-03-10 21:32:15,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:15,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937365230] [2021-03-10 21:32:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:15,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937365230] [2021-03-10 21:32:15,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080238143] [2021-03-10 21:32:15,897 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 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:15,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:15,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:15,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:32:15,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:15,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:15,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:32:15,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936227859] [2021-03-10 21:32:15,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:32:15,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:15,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:32:15,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:15,969 INFO L87 Difference]: Start difference. First operand 131145 states and 395960 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 21:32:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:16,533 INFO L93 Difference]: Finished difference Result 131823 states and 397349 transitions. [2021-03-10 21:32:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:32:16,534 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 24 [2021-03-10 21:32:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:16,771 INFO L225 Difference]: With dead ends: 131823 [2021-03-10 21:32:16,771 INFO L226 Difference]: Without dead ends: 131817 [2021-03-10 21:32:16,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131817 states. [2021-03-10 21:32:18,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131817 to 131145. [2021-03-10 21:32:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131145 states, 131144 states have (on average 3.019253644848411) internal successors, (395957), 131144 states have internal predecessors, (395957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131145 states to 131145 states and 395957 transitions. [2021-03-10 21:32:19,279 INFO L78 Accepts]: Start accepts. Automaton has 131145 states and 395957 transitions. Word has length 24 [2021-03-10 21:32:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:19,279 INFO L480 AbstractCegarLoop]: Abstraction has 131145 states and 395957 transitions. [2021-03-10 21:32:19,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 21:32:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 131145 states and 395957 transitions. [2021-03-10 21:32:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:19,320 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:19,320 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:19,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10627,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:19,520 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:19,521 INFO L82 PathProgramCache]: Analyzing trace with hash 266264850, now seen corresponding path program 331 times [2021-03-10 21:32:19,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:19,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026067473] [2021-03-10 21:32:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:19,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026067473] [2021-03-10 21:32:19,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658526799] [2021-03-10 21:32:19,944 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 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:19,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:32:19,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:32:20,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:20,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-03-10 21:32:20,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470919612] [2021-03-10 21:32:20,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:32:20,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:20,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:32:20,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:20,010 INFO L87 Difference]: Start difference. First operand 131145 states and 395957 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:32:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:20,596 INFO L93 Difference]: Finished difference Result 131611 states and 396867 transitions. [2021-03-10 21:32:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:32:20,597 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:32:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:20,834 INFO L225 Difference]: With dead ends: 131611 [2021-03-10 21:32:20,835 INFO L226 Difference]: Without dead ends: 131596 [2021-03-10 21:32:20,835 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 501.9ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131596 states. [2021-03-10 21:32:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131596 to 131179. [2021-03-10 21:32:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131179 states, 131178 states have (on average 3.0187988839592004) internal successors, (396000), 131178 states have internal predecessors, (396000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131179 states to 131179 states and 396000 transitions. [2021-03-10 21:32:23,338 INFO L78 Accepts]: Start accepts. Automaton has 131179 states and 396000 transitions. Word has length 24 [2021-03-10 21:32:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:23,338 INFO L480 AbstractCegarLoop]: Abstraction has 131179 states and 396000 transitions. [2021-03-10 21:32:23,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:32:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 131179 states and 396000 transitions. [2021-03-10 21:32:23,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:23,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:23,380 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:23,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10628,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:23,580 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:23,580 INFO L82 PathProgramCache]: Analyzing trace with hash -158046386, now seen corresponding path program 332 times [2021-03-10 21:32:23,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:23,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418893223] [2021-03-10 21:32:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:23,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418893223] [2021-03-10 21:32:23,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027031457] [2021-03-10 21:32:23,679 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 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:23,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:23,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:32:23,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:32:23,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:23,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-03-10 21:32:23,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418119886] [2021-03-10 21:32:23,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:32:23,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:23,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:32:23,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:23,741 INFO L87 Difference]: Start difference. First operand 131179 states and 396000 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:32:24,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:24,731 INFO L93 Difference]: Finished difference Result 132080 states and 397867 transitions. [2021-03-10 21:32:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:32:24,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:32:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:24,965 INFO L225 Difference]: With dead ends: 132080 [2021-03-10 21:32:24,965 INFO L226 Difference]: Without dead ends: 132074 [2021-03-10 21:32:24,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:32:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132074 states. [2021-03-10 21:32:27,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132074 to 131189. [2021-03-10 21:32:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131189 states, 131188 states have (on average 3.018713601853828) internal successors, (396019), 131188 states have internal predecessors, (396019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131189 states to 131189 states and 396019 transitions. [2021-03-10 21:32:27,530 INFO L78 Accepts]: Start accepts. Automaton has 131189 states and 396019 transitions. Word has length 24 [2021-03-10 21:32:27,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:27,530 INFO L480 AbstractCegarLoop]: Abstraction has 131189 states and 396019 transitions. [2021-03-10 21:32:27,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:32:27,530 INFO L276 IsEmpty]: Start isEmpty. Operand 131189 states and 396019 transitions. [2021-03-10 21:32:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:27,571 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:27,571 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:27,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10629,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:27,771 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:27,772 INFO L82 PathProgramCache]: Analyzing trace with hash -205155220, now seen corresponding path program 333 times [2021-03-10 21:32:27,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:27,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392685905] [2021-03-10 21:32:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:27,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392685905] [2021-03-10 21:32:27,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434352449] [2021-03-10 21:32:27,854 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 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:27,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:32:27,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:27,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:32:27,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:27,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:27,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:32:27,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305716918] [2021-03-10 21:32:27,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:32:27,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:27,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:32:27,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:27,921 INFO L87 Difference]: Start difference. First operand 131189 states and 396019 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:32:28,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:28,884 INFO L93 Difference]: Finished difference Result 131602 states and 396804 transitions. [2021-03-10 21:32:28,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:32:28,884 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 24 [2021-03-10 21:32:28,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:29,118 INFO L225 Difference]: With dead ends: 131602 [2021-03-10 21:32:29,119 INFO L226 Difference]: Without dead ends: 131599 [2021-03-10 21:32:29,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131599 states. [2021-03-10 21:32:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131599 to 131169. [2021-03-10 21:32:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131169 states, 131168 states have (on average 3.0181675408636255) internal successors, (395887), 131168 states have internal predecessors, (395887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131169 states to 131169 states and 395887 transitions. [2021-03-10 21:32:31,535 INFO L78 Accepts]: Start accepts. Automaton has 131169 states and 395887 transitions. Word has length 24 [2021-03-10 21:32:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:31,535 INFO L480 AbstractCegarLoop]: Abstraction has 131169 states and 395887 transitions. [2021-03-10 21:32:31,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:32:31,535 INFO L276 IsEmpty]: Start isEmpty. Operand 131169 states and 395887 transitions. [2021-03-10 21:32:31,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:31,577 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:31,577 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:31,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10630 [2021-03-10 21:32:31,777 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:31,777 INFO L82 PathProgramCache]: Analyzing trace with hash -648054360, now seen corresponding path program 334 times [2021-03-10 21:32:31,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:31,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972698030] [2021-03-10 21:32:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:31,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972698030] [2021-03-10 21:32:31,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544751446] [2021-03-10 21:32:31,861 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 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:31,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:31,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:31,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:32:31,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:32:31,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:31,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-03-10 21:32:31,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34675687] [2021-03-10 21:32:31,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:32:31,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:31,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:32:31,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:31,921 INFO L87 Difference]: Start difference. First operand 131169 states and 395887 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:32:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:32,891 INFO L93 Difference]: Finished difference Result 132909 states and 399521 transitions. [2021-03-10 21:32:32,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:32:32,892 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 24 [2021-03-10 21:32:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:33,112 INFO L225 Difference]: With dead ends: 132909 [2021-03-10 21:32:33,112 INFO L226 Difference]: Without dead ends: 132901 [2021-03-10 21:32:33,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:33,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132901 states. [2021-03-10 21:32:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132901 to 131188. [2021-03-10 21:32:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131188 states, 131187 states have (on average 3.0180734371545963) internal successors, (395932), 131187 states have internal predecessors, (395932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131188 states to 131188 states and 395932 transitions. [2021-03-10 21:32:35,329 INFO L78 Accepts]: Start accepts. Automaton has 131188 states and 395932 transitions. Word has length 24 [2021-03-10 21:32:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:35,330 INFO L480 AbstractCegarLoop]: Abstraction has 131188 states and 395932 transitions. [2021-03-10 21:32:35,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:32:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 131188 states and 395932 transitions. [2021-03-10 21:32:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:35,371 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:35,371 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:35,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10631,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:35,571 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:35,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:35,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1493025812, now seen corresponding path program 335 times [2021-03-10 21:32:35,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:35,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320967341] [2021-03-10 21:32:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:35,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320967341] [2021-03-10 21:32:35,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123200642] [2021-03-10 21:32:35,664 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 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:35,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:32:35,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:35,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:32:35,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:32:35,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:35,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-03-10 21:32:35,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619784457] [2021-03-10 21:32:35,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:32:35,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:35,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:32:35,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:35,726 INFO L87 Difference]: Start difference. First operand 131188 states and 395932 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:32:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:36,285 INFO L93 Difference]: Finished difference Result 132917 states and 399522 transitions. [2021-03-10 21:32:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:32:36,286 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:32:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:36,528 INFO L225 Difference]: With dead ends: 132917 [2021-03-10 21:32:36,528 INFO L226 Difference]: Without dead ends: 132902 [2021-03-10 21:32:36,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:37,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132902 states. [2021-03-10 21:32:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132902 to 131226. [2021-03-10 21:32:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131226 states, 131225 states have (on average 3.017854829491332) internal successors, (396018), 131225 states have internal predecessors, (396018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131226 states to 131226 states and 396018 transitions. [2021-03-10 21:32:39,253 INFO L78 Accepts]: Start accepts. Automaton has 131226 states and 396018 transitions. Word has length 24 [2021-03-10 21:32:39,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:39,253 INFO L480 AbstractCegarLoop]: Abstraction has 131226 states and 396018 transitions. [2021-03-10 21:32:39,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:32:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 131226 states and 396018 transitions. [2021-03-10 21:32:39,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:39,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:39,296 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:39,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10632 [2021-03-10 21:32:39,496 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:39,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:39,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1917337048, now seen corresponding path program 336 times [2021-03-10 21:32:39,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:39,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102496964] [2021-03-10 21:32:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:39,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102496964] [2021-03-10 21:32:39,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693614076] [2021-03-10 21:32:39,596 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:39,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:39,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:39,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:32:39,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:39,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:39,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:32:39,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063804881] [2021-03-10 21:32:39,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:32:39,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:39,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:32:39,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:39,662 INFO L87 Difference]: Start difference. First operand 131226 states and 396018 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:32:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:40,263 INFO L93 Difference]: Finished difference Result 132184 states and 397974 transitions. [2021-03-10 21:32:40,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:32:40,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 24 [2021-03-10 21:32:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:40,505 INFO L225 Difference]: With dead ends: 132184 [2021-03-10 21:32:40,506 INFO L226 Difference]: Without dead ends: 132172 [2021-03-10 21:32:40,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132172 states. [2021-03-10 21:32:42,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132172 to 131230. [2021-03-10 21:32:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131230 states, 131229 states have (on average 3.0178390447233463) internal successors, (396028), 131229 states have internal predecessors, (396028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131230 states to 131230 states and 396028 transitions. [2021-03-10 21:32:43,315 INFO L78 Accepts]: Start accepts. Automaton has 131230 states and 396028 transitions. Word has length 24 [2021-03-10 21:32:43,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:43,315 INFO L480 AbstractCegarLoop]: Abstraction has 131230 states and 396028 transitions. [2021-03-10 21:32:43,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:32:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 131230 states and 396028 transitions. [2021-03-10 21:32:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:43,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:43,352 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:43,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10633 [2021-03-10 21:32:43,553 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:43,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2108883820, now seen corresponding path program 337 times [2021-03-10 21:32:43,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:43,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601673649] [2021-03-10 21:32:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:43,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601673649] [2021-03-10 21:32:43,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963326289] [2021-03-10 21:32:43,656 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 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:43,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:32:43,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:32:43,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:43,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-03-10 21:32:43,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796163501] [2021-03-10 21:32:43,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:32:43,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:43,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:32:43,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:43,716 INFO L87 Difference]: Start difference. First operand 131230 states and 396028 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:32:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:44,269 INFO L93 Difference]: Finished difference Result 132077 states and 397760 transitions. [2021-03-10 21:32:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:32:44,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:32:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:44,508 INFO L225 Difference]: With dead ends: 132077 [2021-03-10 21:32:44,508 INFO L226 Difference]: Without dead ends: 132063 [2021-03-10 21:32:44,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132063 states. [2021-03-10 21:32:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132063 to 131230. [2021-03-10 21:32:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131230 states, 131229 states have (on average 3.017823804189623) internal successors, (396026), 131229 states have internal predecessors, (396026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131230 states to 131230 states and 396026 transitions. [2021-03-10 21:32:47,005 INFO L78 Accepts]: Start accepts. Automaton has 131230 states and 396026 transitions. Word has length 24 [2021-03-10 21:32:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:47,005 INFO L480 AbstractCegarLoop]: Abstraction has 131230 states and 396026 transitions. [2021-03-10 21:32:47,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:32:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 131230 states and 396026 transitions. [2021-03-10 21:32:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:47,048 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:47,048 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:47,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10634 [2021-03-10 21:32:47,262 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:47,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1156481466, now seen corresponding path program 338 times [2021-03-10 21:32:47,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:47,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473281860] [2021-03-10 21:32:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:47,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473281860] [2021-03-10 21:32:47,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314064757] [2021-03-10 21:32:47,656 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:32:47,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:47,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:47,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:32:47,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:32:47,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:47,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:32:47,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779854260] [2021-03-10 21:32:47,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:32:47,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:47,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:32:47,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:32:47,763 INFO L87 Difference]: Start difference. First operand 131230 states and 396026 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:32:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:48,245 INFO L93 Difference]: Finished difference Result 131537 states and 396519 transitions. [2021-03-10 21:32:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:32:48,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 24 [2021-03-10 21:32:48,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:48,486 INFO L225 Difference]: With dead ends: 131537 [2021-03-10 21:32:48,486 INFO L226 Difference]: Without dead ends: 131537 [2021-03-10 21:32:48,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 415.3ms TimeCoverageRelationStatistics Valid=148, Invalid=232, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:32:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131537 states. [2021-03-10 21:32:50,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131537 to 131150. [2021-03-10 21:32:50,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131150 states, 131149 states have (on average 3.018078673874753) internal successors, (395818), 131149 states have internal predecessors, (395818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:50,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131150 states to 131150 states and 395818 transitions. [2021-03-10 21:32:50,962 INFO L78 Accepts]: Start accepts. Automaton has 131150 states and 395818 transitions. Word has length 24 [2021-03-10 21:32:50,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:50,962 INFO L480 AbstractCegarLoop]: Abstraction has 131150 states and 395818 transitions. [2021-03-10 21:32:50,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:32:50,962 INFO L276 IsEmpty]: Start isEmpty. Operand 131150 states and 395818 transitions. [2021-03-10 21:32:51,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:51,004 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:51,004 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:51,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10635 [2021-03-10 21:32:51,205 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:51,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1380742056, now seen corresponding path program 339 times [2021-03-10 21:32:51,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:51,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958586632] [2021-03-10 21:32:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:51,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958586632] [2021-03-10 21:32:51,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627908043] [2021-03-10 21:32:51,303 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 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:51,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:32:51,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:51,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:32:51,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:51,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:51,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 21:32:51,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720086744] [2021-03-10 21:32:51,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:32:51,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:32:51,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:51,379 INFO L87 Difference]: Start difference. First operand 131150 states and 395818 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 21:32:52,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:52,331 INFO L93 Difference]: Finished difference Result 131545 states and 396600 transitions. [2021-03-10 21:32:52,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:32:52,332 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 24 [2021-03-10 21:32:52,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:52,577 INFO L225 Difference]: With dead ends: 131545 [2021-03-10 21:32:52,577 INFO L226 Difference]: Without dead ends: 131527 [2021-03-10 21:32:52,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:32:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131527 states. [2021-03-10 21:32:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131527 to 131140. [2021-03-10 21:32:54,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131140 states, 131139 states have (on average 3.0178284110752713) internal successors, (395755), 131139 states have internal predecessors, (395755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131140 states to 131140 states and 395755 transitions. [2021-03-10 21:32:55,050 INFO L78 Accepts]: Start accepts. Automaton has 131140 states and 395755 transitions. Word has length 24 [2021-03-10 21:32:55,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:55,050 INFO L480 AbstractCegarLoop]: Abstraction has 131140 states and 395755 transitions. [2021-03-10 21:32:55,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 21:32:55,050 INFO L276 IsEmpty]: Start isEmpty. Operand 131140 states and 395755 transitions. [2021-03-10 21:32:55,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:55,091 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:55,091 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:55,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10636,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:55,291 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:55,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:55,292 INFO L82 PathProgramCache]: Analyzing trace with hash -378548606, now seen corresponding path program 340 times [2021-03-10 21:32:55,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:55,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962363494] [2021-03-10 21:32:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:55,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962363494] [2021-03-10 21:32:55,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557835479] [2021-03-10 21:32:55,388 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 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:55,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:55,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:55,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:32:55,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:32:55,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:55,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-03-10 21:32:55,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342615171] [2021-03-10 21:32:55,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:32:55,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:55,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:32:55,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:55,456 INFO L87 Difference]: Start difference. First operand 131140 states and 395755 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 21:32:56,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:56,427 INFO L93 Difference]: Finished difference Result 132843 states and 399256 transitions. [2021-03-10 21:32:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:32:56,428 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 24 [2021-03-10 21:32:56,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:56,671 INFO L225 Difference]: With dead ends: 132843 [2021-03-10 21:32:56,671 INFO L226 Difference]: Without dead ends: 132825 [2021-03-10 21:32:56,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:32:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132825 states. [2021-03-10 21:32:58,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132825 to 131194. [2021-03-10 21:32:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131194 states, 131193 states have (on average 3.017317997149238) internal successors, (395851), 131193 states have internal predecessors, (395851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131194 states to 131194 states and 395851 transitions. [2021-03-10 21:32:59,058 INFO L78 Accepts]: Start accepts. Automaton has 131194 states and 395851 transitions. Word has length 24 [2021-03-10 21:32:59,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:59,058 INFO L480 AbstractCegarLoop]: Abstraction has 131194 states and 395851 transitions. [2021-03-10 21:32:59,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 21:32:59,059 INFO L276 IsEmpty]: Start isEmpty. Operand 131194 states and 395851 transitions. [2021-03-10 21:32:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:59,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:59,101 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:59,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10637,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:59,301 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash -647295034, now seen corresponding path program 341 times [2021-03-10 21:32:59,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:59,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408319822] [2021-03-10 21:32:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:59,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408319822] [2021-03-10 21:32:59,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561662380] [2021-03-10 21:32:59,406 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:59,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:32:59,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:59,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:32:59,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:32:59,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:59,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-03-10 21:32:59,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067019082] [2021-03-10 21:32:59,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:32:59,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:59,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:32:59,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:59,476 INFO L87 Difference]: Start difference. First operand 131194 states and 395851 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 21:33:00,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:00,467 INFO L93 Difference]: Finished difference Result 132117 states and 397738 transitions. [2021-03-10 21:33:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:33:00,468 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 24 [2021-03-10 21:33:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:00,720 INFO L225 Difference]: With dead ends: 132117 [2021-03-10 21:33:00,721 INFO L226 Difference]: Without dead ends: 132103 [2021-03-10 21:33:00,721 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:33:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132103 states. [2021-03-10 21:33:02,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132103 to 131192. [2021-03-10 21:33:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131192 states, 131191 states have (on average 3.0173182611612077) internal successors, (395845), 131191 states have internal predecessors, (395845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131192 states to 131192 states and 395845 transitions. [2021-03-10 21:33:02,993 INFO L78 Accepts]: Start accepts. Automaton has 131192 states and 395845 transitions. Word has length 24 [2021-03-10 21:33:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:02,993 INFO L480 AbstractCegarLoop]: Abstraction has 131192 states and 395845 transitions. [2021-03-10 21:33:02,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 21:33:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 131192 states and 395845 transitions. [2021-03-10 21:33:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:03,035 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:03,035 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:03,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10638,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:03,235 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:03,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:03,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1958685642, now seen corresponding path program 342 times [2021-03-10 21:33:03,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:03,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702483318] [2021-03-10 21:33:03,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:03,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702483318] [2021-03-10 21:33:03,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066847754] [2021-03-10 21:33:03,296 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 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:03,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:33:03,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:33:03,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:33:03,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:03,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:33:03,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039007445] [2021-03-10 21:33:03,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:33:03,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:03,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:33:03,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:33:03,367 INFO L87 Difference]: Start difference. First operand 131192 states and 395845 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) 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 21:33:03,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:03,848 INFO L93 Difference]: Finished difference Result 131572 states and 396467 transitions. [2021-03-10 21:33:03,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:33:03,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) 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 24 [2021-03-10 21:33:03,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:04,087 INFO L225 Difference]: With dead ends: 131572 [2021-03-10 21:33:04,087 INFO L226 Difference]: Without dead ends: 131572 [2021-03-10 21:33:04,087 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:04,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131572 states. [2021-03-10 21:33:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131572 to 131222. [2021-03-10 21:33:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131222 states, 131221 states have (on average 3.017291439632376) internal successors, (395932), 131221 states have internal predecessors, (395932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131222 states to 131222 states and 395932 transitions. [2021-03-10 21:33:06,855 INFO L78 Accepts]: Start accepts. Automaton has 131222 states and 395932 transitions. Word has length 24 [2021-03-10 21:33:06,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:06,855 INFO L480 AbstractCegarLoop]: Abstraction has 131222 states and 395932 transitions. [2021-03-10 21:33:06,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) 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 21:33:06,855 INFO L276 IsEmpty]: Start isEmpty. Operand 131222 states and 395932 transitions. [2021-03-10 21:33:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:06,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:06,897 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:07,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10639,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:07,097 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:07,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:07,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1685775956, now seen corresponding path program 343 times [2021-03-10 21:33:07,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:07,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639790740] [2021-03-10 21:33:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:07,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639790740] [2021-03-10 21:33:07,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926970727] [2021-03-10 21:33:07,168 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 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:07,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:33:07,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:33:07,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:07,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-03-10 21:33:07,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676561010] [2021-03-10 21:33:07,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:33:07,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:07,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:33:07,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:33:07,231 INFO L87 Difference]: Start difference. First operand 131222 states and 395932 transitions. Second operand has 16 states, 16 states have (on average 1.8125) 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 21:33:07,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:07,786 INFO L93 Difference]: Finished difference Result 131499 states and 396327 transitions. [2021-03-10 21:33:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:07,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) 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 24 [2021-03-10 21:33:07,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:08,021 INFO L225 Difference]: With dead ends: 131499 [2021-03-10 21:33:08,021 INFO L226 Difference]: Without dead ends: 131496 [2021-03-10 21:33:08,021 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=215, Invalid=435, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131496 states. [2021-03-10 21:33:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131496 to 131222. [2021-03-10 21:33:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131222 states, 131221 states have (on average 3.0170704384206797) internal successors, (395903), 131221 states have internal predecessors, (395903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131222 states to 131222 states and 395903 transitions. [2021-03-10 21:33:10,871 INFO L78 Accepts]: Start accepts. Automaton has 131222 states and 395903 transitions. Word has length 24 [2021-03-10 21:33:10,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:10,871 INFO L480 AbstractCegarLoop]: Abstraction has 131222 states and 395903 transitions. [2021-03-10 21:33:10,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) 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 21:33:10,871 INFO L276 IsEmpty]: Start isEmpty. Operand 131222 states and 395903 transitions. [2021-03-10 21:33:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:10,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:10,909 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:11,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10640 [2021-03-10 21:33:11,109 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:11,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1536105960, now seen corresponding path program 344 times [2021-03-10 21:33:11,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:11,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421592125] [2021-03-10 21:33:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:11,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421592125] [2021-03-10 21:33:11,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510781325] [2021-03-10 21:33:11,184 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 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:11,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:11,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:11,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:33:11,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:33:11,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:11,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-03-10 21:33:11,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437890441] [2021-03-10 21:33:11,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:33:11,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:33:11,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:33:11,251 INFO L87 Difference]: Start difference. First operand 131222 states and 395903 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:33:11,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:11,819 INFO L93 Difference]: Finished difference Result 131505 states and 396305 transitions. [2021-03-10 21:33:11,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:33:11,820 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 24 [2021-03-10 21:33:11,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:12,057 INFO L225 Difference]: With dead ends: 131505 [2021-03-10 21:33:12,058 INFO L226 Difference]: Without dead ends: 131500 [2021-03-10 21:33:12,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=244, Invalid=512, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:33:12,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131500 states. [2021-03-10 21:33:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131500 to 131222. [2021-03-10 21:33:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131222 states, 131221 states have (on average 3.016437917711342) internal successors, (395820), 131221 states have internal predecessors, (395820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131222 states to 131222 states and 395820 transitions. [2021-03-10 21:33:14,595 INFO L78 Accepts]: Start accepts. Automaton has 131222 states and 395820 transitions. Word has length 24 [2021-03-10 21:33:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:14,596 INFO L480 AbstractCegarLoop]: Abstraction has 131222 states and 395820 transitions. [2021-03-10 21:33:14,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:33:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 131222 states and 395820 transitions. [2021-03-10 21:33:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:14,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:14,637 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:14,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10641 [2021-03-10 21:33:14,837 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:14,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1664769748, now seen corresponding path program 345 times [2021-03-10 21:33:14,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:14,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347181126] [2021-03-10 21:33:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:15,151 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-03-10 21:33:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:15,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347181126] [2021-03-10 21:33:15,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506081338] [2021-03-10 21:33:15,248 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:15,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:33:15,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:15,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:33:15,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:15,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:15,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:33:15,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031821427] [2021-03-10 21:33:15,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:33:15,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:15,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:33:15,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:15,324 INFO L87 Difference]: Start difference. First operand 131222 states and 395820 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:33:15,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:15,904 INFO L93 Difference]: Finished difference Result 131512 states and 396230 transitions. [2021-03-10 21:33:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:33:15,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 24 [2021-03-10 21:33:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:16,148 INFO L225 Difference]: With dead ends: 131512 [2021-03-10 21:33:16,148 INFO L226 Difference]: Without dead ends: 131506 [2021-03-10 21:33:16,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 491.0ms TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:33:16,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131506 states. [2021-03-10 21:33:18,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131506 to 131222. [2021-03-10 21:33:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131222 states, 131221 states have (on average 3.014890909229468) internal successors, (395617), 131221 states have internal predecessors, (395617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131222 states to 131222 states and 395617 transitions. [2021-03-10 21:33:18,763 INFO L78 Accepts]: Start accepts. Automaton has 131222 states and 395617 transitions. Word has length 24 [2021-03-10 21:33:18,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:18,763 INFO L480 AbstractCegarLoop]: Abstraction has 131222 states and 395617 transitions. [2021-03-10 21:33:18,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:33:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 131222 states and 395617 transitions. [2021-03-10 21:33:18,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:18,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:18,805 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:19,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10642 [2021-03-10 21:33:19,006 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:19,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:19,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2107668888, now seen corresponding path program 346 times [2021-03-10 21:33:19,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:19,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878066531] [2021-03-10 21:33:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:19,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878066531] [2021-03-10 21:33:19,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150468257] [2021-03-10 21:33:19,091 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 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:19,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:19,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:19,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:33:19,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:33:19,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:19,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-03-10 21:33:19,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170795424] [2021-03-10 21:33:19,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:33:19,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:19,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:33:19,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:19,157 INFO L87 Difference]: Start difference. First operand 131222 states and 395617 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:33:20,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:20,114 INFO L93 Difference]: Finished difference Result 134981 states and 404371 transitions. [2021-03-10 21:33:20,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:33:20,114 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:33:20,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:20,370 INFO L225 Difference]: With dead ends: 134981 [2021-03-10 21:33:20,370 INFO L226 Difference]: Without dead ends: 134973 [2021-03-10 21:33:20,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:33:20,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134973 states. [2021-03-10 21:33:22,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134973 to 131282. [2021-03-10 21:33:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131282 states, 131281 states have (on average 3.014632734363693) internal successors, (395764), 131281 states have internal predecessors, (395764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131282 states to 131282 states and 395764 transitions. [2021-03-10 21:33:22,902 INFO L78 Accepts]: Start accepts. Automaton has 131282 states and 395764 transitions. Word has length 24 [2021-03-10 21:33:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:22,902 INFO L480 AbstractCegarLoop]: Abstraction has 131282 states and 395764 transitions. [2021-03-10 21:33:22,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:33:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 131282 states and 395764 transitions. [2021-03-10 21:33:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:22,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:22,943 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:23,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10643,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:23,143 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:23,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:23,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1342326956, now seen corresponding path program 347 times [2021-03-10 21:33:23,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:23,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917835134] [2021-03-10 21:33:23,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:23,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917835134] [2021-03-10 21:33:23,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557993730] [2021-03-10 21:33:23,233 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 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:23,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:33:23,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:23,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:33:23,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:23,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:23,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:33:23,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084400597] [2021-03-10 21:33:23,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:33:23,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:23,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:33:23,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:23,305 INFO L87 Difference]: Start difference. First operand 131282 states and 395764 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:33:24,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:24,281 INFO L93 Difference]: Finished difference Result 133765 states and 401069 transitions. [2021-03-10 21:33:24,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:24,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 24 [2021-03-10 21:33:24,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:24,526 INFO L225 Difference]: With dead ends: 133765 [2021-03-10 21:33:24,526 INFO L226 Difference]: Without dead ends: 133750 [2021-03-10 21:33:24,526 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:33:24,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133750 states. [2021-03-10 21:33:26,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133750 to 131295. [2021-03-10 21:33:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131295 states, 131294 states have (on average 3.0145475040748244) internal successors, (395792), 131294 states have internal predecessors, (395792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131295 states to 131295 states and 395792 transitions. [2021-03-10 21:33:26,916 INFO L78 Accepts]: Start accepts. Automaton has 131295 states and 395792 transitions. Word has length 24 [2021-03-10 21:33:26,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:26,916 INFO L480 AbstractCegarLoop]: Abstraction has 131295 states and 395792 transitions. [2021-03-10 21:33:26,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:33:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 131295 states and 395792 transitions. [2021-03-10 21:33:26,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:26,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:26,958 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:27,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10644,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:27,158 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash 918015720, now seen corresponding path program 348 times [2021-03-10 21:33:27,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:27,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90171802] [2021-03-10 21:33:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:27,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90171802] [2021-03-10 21:33:27,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503386500] [2021-03-10 21:33:27,258 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 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:27,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:33:27,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:27,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:33:27,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:27,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:27,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 21:33:27,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413293298] [2021-03-10 21:33:27,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:33:27,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:27,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:33:27,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:33:27,331 INFO L87 Difference]: Start difference. First operand 131295 states and 395792 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 21:33:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:28,409 INFO L93 Difference]: Finished difference Result 133777 states and 401075 transitions. [2021-03-10 21:33:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:33:28,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 24 [2021-03-10 21:33:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:28,631 INFO L225 Difference]: With dead ends: 133777 [2021-03-10 21:33:28,631 INFO L226 Difference]: Without dead ends: 133759 [2021-03-10 21:33:28,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:33:28,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133759 states. [2021-03-10 21:33:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133759 to 131393. [2021-03-10 21:33:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131393 states, 131392 states have (on average 3.0140800048709204) internal successors, (396026), 131392 states have internal predecessors, (396026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131393 states to 131393 states and 396026 transitions. [2021-03-10 21:33:30,887 INFO L78 Accepts]: Start accepts. Automaton has 131393 states and 396026 transitions. Word has length 24 [2021-03-10 21:33:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:30,887 INFO L480 AbstractCegarLoop]: Abstraction has 131393 states and 396026 transitions. [2021-03-10 21:33:30,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 21:33:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 131393 states and 396026 transitions. [2021-03-10 21:33:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:30,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:30,930 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:31,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10645 [2021-03-10 21:33:31,130 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:31,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:31,130 INFO L82 PathProgramCache]: Analyzing trace with hash 649269292, now seen corresponding path program 349 times [2021-03-10 21:33:31,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:31,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617498147] [2021-03-10 21:33:31,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:31,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617498147] [2021-03-10 21:33:31,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849203564] [2021-03-10 21:33:31,248 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 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:31,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:33:31,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:33:31,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:31,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-03-10 21:33:31,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197343426] [2021-03-10 21:33:31,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:33:31,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:31,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:33:31,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:33:31,323 INFO L87 Difference]: Start difference. First operand 131393 states and 396026 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 21:33:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:31,970 INFO L93 Difference]: Finished difference Result 132504 states and 398292 transitions. [2021-03-10 21:33:31,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:33:31,971 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 24 [2021-03-10 21:33:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:32,687 INFO L225 Difference]: With dead ends: 132504 [2021-03-10 21:33:32,687 INFO L226 Difference]: Without dead ends: 132483 [2021-03-10 21:33:32,687 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:33:32,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132483 states. [2021-03-10 21:33:34,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132483 to 131393. [2021-03-10 21:33:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131393 states, 131392 states have (on average 3.0140571724305896) internal successors, (396023), 131392 states have internal predecessors, (396023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131393 states to 131393 states and 396023 transitions. [2021-03-10 21:33:34,951 INFO L78 Accepts]: Start accepts. Automaton has 131393 states and 396023 transitions. Word has length 24 [2021-03-10 21:33:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:34,951 INFO L480 AbstractCegarLoop]: Abstraction has 131393 states and 396023 transitions. [2021-03-10 21:33:34,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 21:33:34,951 INFO L276 IsEmpty]: Start isEmpty. Operand 131393 states and 396023 transitions. [2021-03-10 21:33:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:34,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:34,993 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:35,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10646,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:35,193 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:35,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:35,194 INFO L82 PathProgramCache]: Analyzing trace with hash 908064616, now seen corresponding path program 350 times [2021-03-10 21:33:35,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:35,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729150672] [2021-03-10 21:33:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:35,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729150672] [2021-03-10 21:33:35,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877227974] [2021-03-10 21:33:35,305 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 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:35,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:35,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:35,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:33:35,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:33:35,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:35,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-03-10 21:33:35,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919548956] [2021-03-10 21:33:35,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:33:35,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:35,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:33:35,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:33:35,375 INFO L87 Difference]: Start difference. First operand 131393 states and 396023 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 21:33:35,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:35,972 INFO L93 Difference]: Finished difference Result 132387 states and 398057 transitions. [2021-03-10 21:33:35,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:35,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 24 [2021-03-10 21:33:35,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:36,215 INFO L225 Difference]: With dead ends: 132387 [2021-03-10 21:33:36,216 INFO L226 Difference]: Without dead ends: 132363 [2021-03-10 21:33:36,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:33:36,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132363 states. [2021-03-10 21:33:38,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132363 to 131393. [2021-03-10 21:33:38,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131393 states, 131392 states have (on average 3.0140343399902583) internal successors, (396020), 131392 states have internal predecessors, (396020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131393 states to 131393 states and 396020 transitions. [2021-03-10 21:33:39,043 INFO L78 Accepts]: Start accepts. Automaton has 131393 states and 396020 transitions. Word has length 24 [2021-03-10 21:33:39,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:39,043 INFO L480 AbstractCegarLoop]: Abstraction has 131393 states and 396020 transitions. [2021-03-10 21:33:39,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 21:33:39,043 INFO L276 IsEmpty]: Start isEmpty. Operand 131393 states and 396020 transitions. [2021-03-10 21:33:39,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:39,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:39,085 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:39,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10647,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:39,285 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:39,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:39,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1884179694, now seen corresponding path program 351 times [2021-03-10 21:33:39,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:39,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418791731] [2021-03-10 21:33:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:39,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418791731] [2021-03-10 21:33:39,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048044206] [2021-03-10 21:33:39,371 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 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:39,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:33:39,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:39,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:33:39,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:39,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:39,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:33:39,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040533785] [2021-03-10 21:33:39,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:33:39,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:39,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:33:39,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:33:39,445 INFO L87 Difference]: Start difference. First operand 131393 states and 396020 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 21:33:39,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:39,983 INFO L93 Difference]: Finished difference Result 131727 states and 396599 transitions. [2021-03-10 21:33:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:33:39,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 24 [2021-03-10 21:33:39,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:40,228 INFO L225 Difference]: With dead ends: 131727 [2021-03-10 21:33:40,229 INFO L226 Difference]: Without dead ends: 131723 [2021-03-10 21:33:40,229 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:33:40,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131723 states. [2021-03-10 21:33:42,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131723 to 131445. [2021-03-10 21:33:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131445 states, 131444 states have (on average 3.013792946045464) internal successors, (396145), 131444 states have internal predecessors, (396145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131445 states to 131445 states and 396145 transitions. [2021-03-10 21:33:43,152 INFO L78 Accepts]: Start accepts. Automaton has 131445 states and 396145 transitions. Word has length 24 [2021-03-10 21:33:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:43,152 INFO L480 AbstractCegarLoop]: Abstraction has 131445 states and 396145 transitions. [2021-03-10 21:33:43,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 21:33:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 131445 states and 396145 transitions. [2021-03-10 21:33:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:43,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:43,196 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:43,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10648 [2021-03-10 21:33:43,397 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash 705147248, now seen corresponding path program 352 times [2021-03-10 21:33:43,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:43,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263894147] [2021-03-10 21:33:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:43,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263894147] [2021-03-10 21:33:43,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859875462] [2021-03-10 21:33:43,480 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 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:43,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:43,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:43,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:33:43,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:33:43,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:43,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-03-10 21:33:43,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99345964] [2021-03-10 21:33:43,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:33:43,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:43,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:33:43,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:33:43,542 INFO L87 Difference]: Start difference. First operand 131445 states and 396145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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 21:33:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:44,089 INFO L93 Difference]: Finished difference Result 131922 states and 397089 transitions. [2021-03-10 21:33:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:33:44,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 24 [2021-03-10 21:33:44,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:44,337 INFO L225 Difference]: With dead ends: 131922 [2021-03-10 21:33:44,337 INFO L226 Difference]: Without dead ends: 131918 [2021-03-10 21:33:44,337 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=235, Invalid=521, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:33:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131918 states. [2021-03-10 21:33:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131918 to 131425. [2021-03-10 21:33:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131425 states, 131424 states have (on average 3.013209155101047) internal successors, (396008), 131424 states have internal predecessors, (396008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131425 states to 131425 states and 396008 transitions. [2021-03-10 21:33:46,885 INFO L78 Accepts]: Start accepts. Automaton has 131425 states and 396008 transitions. Word has length 24 [2021-03-10 21:33:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:46,885 INFO L480 AbstractCegarLoop]: Abstraction has 131425 states and 396008 transitions. [2021-03-10 21:33:46,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 21:33:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 131425 states and 396008 transitions. [2021-03-10 21:33:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:46,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:46,927 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:47,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10649,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:47,128 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:47,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:47,128 INFO L82 PathProgramCache]: Analyzing trace with hash -139824204, now seen corresponding path program 353 times [2021-03-10 21:33:47,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:47,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343105670] [2021-03-10 21:33:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:47,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343105670] [2021-03-10 21:33:47,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296260279] [2021-03-10 21:33:47,223 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 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:47,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:33:47,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:47,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:33:47,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:33:47,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:47,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-03-10 21:33:47,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230143329] [2021-03-10 21:33:47,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:33:47,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:47,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:33:47,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:47,285 INFO L87 Difference]: Start difference. First operand 131425 states and 396008 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:33:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:48,193 INFO L93 Difference]: Finished difference Result 131927 states and 396979 transitions. [2021-03-10 21:33:48,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:48,194 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:33:48,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:48,431 INFO L225 Difference]: With dead ends: 131927 [2021-03-10 21:33:48,432 INFO L226 Difference]: Without dead ends: 131912 [2021-03-10 21:33:48,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:33:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131912 states. [2021-03-10 21:33:50,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131912 to 131483. [2021-03-10 21:33:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131483 states, 131482 states have (on average 3.012108121263747) internal successors, (396038), 131482 states have internal predecessors, (396038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131483 states to 131483 states and 396038 transitions. [2021-03-10 21:33:50,939 INFO L78 Accepts]: Start accepts. Automaton has 131483 states and 396038 transitions. Word has length 24 [2021-03-10 21:33:50,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:50,940 INFO L480 AbstractCegarLoop]: Abstraction has 131483 states and 396038 transitions. [2021-03-10 21:33:50,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:33:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 131483 states and 396038 transitions. [2021-03-10 21:33:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:50,985 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:50,985 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:51,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10650 [2021-03-10 21:33:51,187 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:51,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:51,187 INFO L82 PathProgramCache]: Analyzing trace with hash -564135440, now seen corresponding path program 354 times [2021-03-10 21:33:51,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:51,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406973195] [2021-03-10 21:33:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:51,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406973195] [2021-03-10 21:33:51,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867878769] [2021-03-10 21:33:51,284 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 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:51,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:33:51,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:51,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:33:51,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:51,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:51,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:33:51,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059616892] [2021-03-10 21:33:51,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:33:51,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:51,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:33:51,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:51,350 INFO L87 Difference]: Start difference. First operand 131483 states and 396038 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:33:52,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:52,287 INFO L93 Difference]: Finished difference Result 132364 states and 397834 transitions. [2021-03-10 21:33:52,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:33:52,288 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 24 [2021-03-10 21:33:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:52,526 INFO L225 Difference]: With dead ends: 132364 [2021-03-10 21:33:52,526 INFO L226 Difference]: Without dead ends: 132358 [2021-03-10 21:33:52,526 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=303, Invalid=689, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:33:52,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132358 states. [2021-03-10 21:33:54,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132358 to 131489. [2021-03-10 21:33:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131489 states, 131488 states have (on average 3.0120695424677537) internal successors, (396051), 131488 states have internal predecessors, (396051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131489 states to 131489 states and 396051 transitions. [2021-03-10 21:33:54,958 INFO L78 Accepts]: Start accepts. Automaton has 131489 states and 396051 transitions. Word has length 24 [2021-03-10 21:33:54,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:54,958 INFO L480 AbstractCegarLoop]: Abstraction has 131489 states and 396051 transitions. [2021-03-10 21:33:54,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 21:33:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand 131489 states and 396051 transitions. [2021-03-10 21:33:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:55,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:55,000 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:55,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10651 [2021-03-10 21:33:55,201 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:55,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:55,201 INFO L82 PathProgramCache]: Analyzing trace with hash -832881868, now seen corresponding path program 355 times [2021-03-10 21:33:55,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:55,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415223881] [2021-03-10 21:33:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:55,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415223881] [2021-03-10 21:33:55,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341757212] [2021-03-10 21:33:55,306 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:55,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:33:55,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:33:55,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:55,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-03-10 21:33:55,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307853819] [2021-03-10 21:33:55,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:33:55,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:55,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:33:55,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:55,368 INFO L87 Difference]: Start difference. First operand 131489 states and 396051 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:33:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:56,431 INFO L93 Difference]: Finished difference Result 132345 states and 397806 transitions. [2021-03-10 21:33:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:56,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:33:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:56,652 INFO L225 Difference]: With dead ends: 132345 [2021-03-10 21:33:56,653 INFO L226 Difference]: Without dead ends: 132338 [2021-03-10 21:33:56,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:33:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132338 states. [2021-03-10 21:33:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132338 to 131489. [2021-03-10 21:33:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131489 states, 131488 states have (on average 3.0120315161839866) internal successors, (396046), 131488 states have internal predecessors, (396046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131489 states to 131489 states and 396046 transitions. [2021-03-10 21:33:58,977 INFO L78 Accepts]: Start accepts. Automaton has 131489 states and 396046 transitions. Word has length 24 [2021-03-10 21:33:58,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:58,977 INFO L480 AbstractCegarLoop]: Abstraction has 131489 states and 396046 transitions. [2021-03-10 21:33:58,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:33:58,977 INFO L276 IsEmpty]: Start isEmpty. Operand 131489 states and 396046 transitions. [2021-03-10 21:33:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:59,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:59,020 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:59,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10652 [2021-03-10 21:33:59,220 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash 974653002, now seen corresponding path program 356 times [2021-03-10 21:33:59,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:59,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943284031] [2021-03-10 21:33:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:59,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943284031] [2021-03-10 21:33:59,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394768991] [2021-03-10 21:33:59,317 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 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:59,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:59,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:59,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:33:59,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:33:59,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:59,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-03-10 21:33:59,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255122369] [2021-03-10 21:33:59,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:33:59,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:59,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:33:59,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:33:59,387 INFO L87 Difference]: Start difference. First operand 131489 states and 396046 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 21:34:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:00,409 INFO L93 Difference]: Finished difference Result 131949 states and 396881 transitions. [2021-03-10 21:34:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:34:00,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 24 [2021-03-10 21:34:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:00,689 INFO L225 Difference]: With dead ends: 131949 [2021-03-10 21:34:00,689 INFO L226 Difference]: Without dead ends: 131931 [2021-03-10 21:34:00,689 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:34:00,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131931 states. [2021-03-10 21:34:02,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131931 to 131486. [2021-03-10 21:34:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131486 states, 131485 states have (on average 3.0111799825075103) internal successors, (395925), 131485 states have internal predecessors, (395925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131486 states to 131486 states and 395925 transitions. [2021-03-10 21:34:03,022 INFO L78 Accepts]: Start accepts. Automaton has 131486 states and 395925 transitions. Word has length 24 [2021-03-10 21:34:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:03,022 INFO L480 AbstractCegarLoop]: Abstraction has 131486 states and 395925 transitions. [2021-03-10 21:34:03,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 21:34:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand 131486 states and 395925 transitions. [2021-03-10 21:34:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:34:03,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:03,066 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:03,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10653 [2021-03-10 21:34:03,266 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:03,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:03,267 INFO L82 PathProgramCache]: Analyzing trace with hash 705906574, now seen corresponding path program 357 times [2021-03-10 21:34:03,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:03,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673850162] [2021-03-10 21:34:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:03,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673850162] [2021-03-10 21:34:03,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779691491] [2021-03-10 21:34:03,368 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 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:03,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:34:03,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:03,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:34:03,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:03,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:03,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 21:34:03,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014475485] [2021-03-10 21:34:03,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:34:03,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:03,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:34:03,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:34:03,442 INFO L87 Difference]: Start difference. First operand 131486 states and 395925 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 21:34:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:04,070 INFO L93 Difference]: Finished difference Result 132484 states and 397985 transitions. [2021-03-10 21:34:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:34:04,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 24 [2021-03-10 21:34:04,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:04,314 INFO L225 Difference]: With dead ends: 132484 [2021-03-10 21:34:04,314 INFO L226 Difference]: Without dead ends: 132477 [2021-03-10 21:34:04,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=363, Invalid=827, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:34:04,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132477 states. [2021-03-10 21:34:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132477 to 131483. [2021-03-10 21:34:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131483 states, 131482 states have (on average 3.0111346039762097) internal successors, (395910), 131482 states have internal predecessors, (395910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131483 states to 131483 states and 395910 transitions. [2021-03-10 21:34:07,017 INFO L78 Accepts]: Start accepts. Automaton has 131483 states and 395910 transitions. Word has length 24 [2021-03-10 21:34:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:07,017 INFO L480 AbstractCegarLoop]: Abstraction has 131483 states and 395910 transitions. [2021-03-10 21:34:07,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 21:34:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 131483 states and 395910 transitions. [2021-03-10 21:34:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:34:07,061 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:07,062 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:07,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10654 [2021-03-10 21:34:07,262 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:07,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:07,262 INFO L82 PathProgramCache]: Analyzing trace with hash -754467280, now seen corresponding path program 358 times [2021-03-10 21:34:07,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:07,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022997773] [2021-03-10 21:34:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:07,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022997773] [2021-03-10 21:34:07,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179417422] [2021-03-10 21:34:07,347 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 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:34:07,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:07,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:07,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:34:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:34:07,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:07,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-03-10 21:34:07,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687083067] [2021-03-10 21:34:07,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:34:07,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:07,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:34:07,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:34:07,446 INFO L87 Difference]: Start difference. First operand 131483 states and 395910 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:34:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:08,012 INFO L93 Difference]: Finished difference Result 132048 states and 397051 transitions. [2021-03-10 21:34:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:34:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:34:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:08,250 INFO L225 Difference]: With dead ends: 132048 [2021-03-10 21:34:08,251 INFO L226 Difference]: Without dead ends: 132044 [2021-03-10 21:34:08,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:34:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132044 states. [2021-03-10 21:34:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132044 to 131483. [2021-03-10 21:34:10,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131483 states, 131482 states have (on average 3.009248414231606) internal successors, (395662), 131482 states have internal predecessors, (395662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131483 states to 131483 states and 395662 transitions. [2021-03-10 21:34:11,179 INFO L78 Accepts]: Start accepts. Automaton has 131483 states and 395662 transitions. Word has length 24 [2021-03-10 21:34:11,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:11,179 INFO L480 AbstractCegarLoop]: Abstraction has 131483 states and 395662 transitions. [2021-03-10 21:34:11,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:34:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 131483 states and 395662 transitions. [2021-03-10 21:34:11,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:34:11,221 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:11,221 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:11,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10655,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:11,422 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:11,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1599438732, now seen corresponding path program 359 times [2021-03-10 21:34:11,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:11,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887043923] [2021-03-10 21:34:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:11,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887043923] [2021-03-10 21:34:11,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198617397] [2021-03-10 21:34:11,512 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 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:11,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:34:11,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:11,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:34:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:34:11,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:11,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-03-10 21:34:11,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820005878] [2021-03-10 21:34:11,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:34:11,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:11,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:34:11,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:34:11,584 INFO L87 Difference]: Start difference. First operand 131483 states and 395662 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 21:34:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:12,172 INFO L93 Difference]: Finished difference Result 134038 states and 401058 transitions. [2021-03-10 21:34:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:34:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 24 [2021-03-10 21:34:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:12,426 INFO L225 Difference]: With dead ends: 134038 [2021-03-10 21:34:12,426 INFO L226 Difference]: Without dead ends: 134023 [2021-03-10 21:34:12,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:34:12,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134023 states. [2021-03-10 21:34:14,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134023 to 131546. [2021-03-10 21:34:14,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131546 states, 131545 states have (on average 3.008985518263712) internal successors, (395817), 131545 states have internal predecessors, (395817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131546 states to 131546 states and 395817 transitions. [2021-03-10 21:34:15,359 INFO L78 Accepts]: Start accepts. Automaton has 131546 states and 395817 transitions. Word has length 24 [2021-03-10 21:34:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:15,359 INFO L480 AbstractCegarLoop]: Abstraction has 131546 states and 395817 transitions. [2021-03-10 21:34:15,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 21:34:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 131546 states and 395817 transitions. [2021-03-10 21:34:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:34:15,401 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:15,401 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:15,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10656 [2021-03-10 21:34:15,601 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:15,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2023749968, now seen corresponding path program 360 times [2021-03-10 21:34:15,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:15,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843305871] [2021-03-10 21:34:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:15,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843305871] [2021-03-10 21:34:15,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997818269] [2021-03-10 21:34:15,699 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 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:15,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:34:15,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:15,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:34:15,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:15,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:15,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 21:34:15,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114954162] [2021-03-10 21:34:15,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:34:15,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:15,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:34:15,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:34:15,773 INFO L87 Difference]: Start difference. First operand 131546 states and 395817 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 21:34:16,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:16,360 INFO L93 Difference]: Finished difference Result 134051 states and 401056 transitions. [2021-03-10 21:34:16,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:34:16,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 24 [2021-03-10 21:34:16,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:16,605 INFO L225 Difference]: With dead ends: 134051 [2021-03-10 21:34:16,605 INFO L226 Difference]: Without dead ends: 134033 [2021-03-10 21:34:16,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:34:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134033 states. [2021-03-10 21:34:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134033 to 131634. [2021-03-10 21:34:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131634 states, 131633 states have (on average 3.0084477296726506) internal successors, (396011), 131633 states have internal predecessors, (396011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131634 states to 131634 states and 396011 transitions. [2021-03-10 21:34:19,205 INFO L78 Accepts]: Start accepts. Automaton has 131634 states and 396011 transitions. Word has length 24 [2021-03-10 21:34:19,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:19,205 INFO L480 AbstractCegarLoop]: Abstraction has 131634 states and 396011 transitions. [2021-03-10 21:34:19,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 21:34:19,205 INFO L276 IsEmpty]: Start isEmpty. Operand 131634 states and 396011 transitions. [2021-03-10 21:34:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:34:19,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:19,249 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:19,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10657,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:19,449 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:19,449 INFO L82 PathProgramCache]: Analyzing trace with hash 2002470900, now seen corresponding path program 361 times [2021-03-10 21:34:19,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:19,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261760391] [2021-03-10 21:34:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:19,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261760391] [2021-03-10 21:34:19,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634857767] [2021-03-10 21:34:19,904 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:19,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:34:19,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:34:19,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:19,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-03-10 21:34:19,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156800077] [2021-03-10 21:34:19,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:34:19,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:19,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:34:19,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:34:19,980 INFO L87 Difference]: Start difference. First operand 131634 states and 396011 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 21:34:20,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:20,560 INFO L93 Difference]: Finished difference Result 132986 states and 398783 transitions. [2021-03-10 21:34:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:34:20,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 24 [2021-03-10 21:34:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:20,809 INFO L225 Difference]: With dead ends: 132986 [2021-03-10 21:34:20,809 INFO L226 Difference]: Without dead ends: 132965 [2021-03-10 21:34:20,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:34:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132965 states. [2021-03-10 21:34:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132965 to 131642. [2021-03-10 21:34:23,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131642 states, 131641 states have (on average 3.0084016377876193) internal successors, (396029), 131641 states have internal predecessors, (396029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:23,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131642 states to 131642 states and 396029 transitions. [2021-03-10 21:34:23,313 INFO L78 Accepts]: Start accepts. Automaton has 131642 states and 396029 transitions. Word has length 24 [2021-03-10 21:34:23,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:23,313 INFO L480 AbstractCegarLoop]: Abstraction has 131642 states and 396029 transitions. [2021-03-10 21:34:23,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 21:34:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 131642 states and 396029 transitions. [2021-03-10 21:34:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:34:23,356 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:23,357 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:23,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10658,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:23,557 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:23,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:23,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2033701072, now seen corresponding path program 362 times [2021-03-10 21:34:23,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:23,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116660557] [2021-03-10 21:34:23,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:23,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116660557] [2021-03-10 21:34:23,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853716516] [2021-03-10 21:34:23,666 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:23,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:23,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:34:23,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:34:23,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:23,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-03-10 21:34:23,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228630441] [2021-03-10 21:34:23,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:34:23,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:23,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:34:23,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:34:23,736 INFO L87 Difference]: Start difference. First operand 131642 states and 396029 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 21:34:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:24,664 INFO L93 Difference]: Finished difference Result 132827 states and 398454 transitions. [2021-03-10 21:34:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:34:24,665 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 24 [2021-03-10 21:34:24,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:24,917 INFO L225 Difference]: With dead ends: 132827 [2021-03-10 21:34:24,917 INFO L226 Difference]: Without dead ends: 132803 [2021-03-10 21:34:24,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=308, Invalid=684, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:34:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132803 states. [2021-03-10 21:34:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132803 to 131642. [2021-03-10 21:34:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131642 states, 131641 states have (on average 3.0083560592824425) internal successors, (396023), 131641 states have internal predecessors, (396023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131642 states to 131642 states and 396023 transitions. [2021-03-10 21:34:27,452 INFO L78 Accepts]: Start accepts. Automaton has 131642 states and 396023 transitions. Word has length 24 [2021-03-10 21:34:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:27,453 INFO L480 AbstractCegarLoop]: Abstraction has 131642 states and 396023 transitions. [2021-03-10 21:34:27,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 21:34:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 131642 states and 396023 transitions. [2021-03-10 21:34:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:34:27,496 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:27,496 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:27,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10659 [2021-03-10 21:34:27,696 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:27,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:27,696 INFO L82 PathProgramCache]: Analyzing trace with hash 654521588, now seen corresponding path program 363 times [2021-03-10 21:34:27,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:27,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626856404] [2021-03-10 21:34:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:27,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626856404] [2021-03-10 21:34:27,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799694264] [2021-03-10 21:34:27,768 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 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:27,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:34:27,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:27,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:34:27,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:27,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:27,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:34:27,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738475523] [2021-03-10 21:34:27,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:34:27,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:27,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:34:27,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:34:27,840 INFO L87 Difference]: Start difference. First operand 131642 states and 396023 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:34:28,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:28,777 INFO L93 Difference]: Finished difference Result 132279 states and 397470 transitions. [2021-03-10 21:34:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:34:28,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 24 [2021-03-10 21:34:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:29,004 INFO L225 Difference]: With dead ends: 132279 [2021-03-10 21:34:29,004 INFO L226 Difference]: Without dead ends: 132279 [2021-03-10 21:34:29,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=166, Invalid=254, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:34:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132279 states. [2021-03-10 21:34:31,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132279 to 131917. [2021-03-10 21:34:31,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131917 states, 131916 states have (on average 3.0087025076563876) internal successors, (396896), 131916 states have internal predecessors, (396896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131917 states to 131917 states and 396896 transitions. [2021-03-10 21:34:31,435 INFO L78 Accepts]: Start accepts. Automaton has 131917 states and 396896 transitions. Word has length 24 [2021-03-10 21:34:31,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:31,435 INFO L480 AbstractCegarLoop]: Abstraction has 131917 states and 396896 transitions. [2021-03-10 21:34:31,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:34:31,435 INFO L276 IsEmpty]: Start isEmpty. Operand 131917 states and 396896 transitions. [2021-03-10 21:34:31,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:34:31,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:31,481 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:31,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10660 [2021-03-10 21:34:31,681 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:31,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1163708020, now seen corresponding path program 364 times [2021-03-10 21:34:31,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:31,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977033061] [2021-03-10 21:34:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:31,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977033061] [2021-03-10 21:34:31,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045408070] [2021-03-10 21:34:31,786 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 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:31,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:31,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:31,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:34:31,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:34:31,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:31,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-03-10 21:34:31,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999327133] [2021-03-10 21:34:31,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:34:31,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:31,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:34:31,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:34:31,856 INFO L87 Difference]: Start difference. First operand 131917 states and 396896 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 21:34:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:32,861 INFO L93 Difference]: Finished difference Result 133111 states and 399324 transitions. [2021-03-10 21:34:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:34:32,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 24 [2021-03-10 21:34:32,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:33,092 INFO L225 Difference]: With dead ends: 133111 [2021-03-10 21:34:33,092 INFO L226 Difference]: Without dead ends: 133104 [2021-03-10 21:34:33,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:34:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133104 states. [2021-03-10 21:34:34,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133104 to 131917. [2021-03-10 21:34:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131917 states, 131916 states have (on average 3.00857363776949) internal successors, (396879), 131916 states have internal predecessors, (396879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131917 states to 131917 states and 396879 transitions. [2021-03-10 21:34:35,366 INFO L78 Accepts]: Start accepts. Automaton has 131917 states and 396879 transitions. Word has length 24 [2021-03-10 21:34:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:35,366 INFO L480 AbstractCegarLoop]: Abstraction has 131917 states and 396879 transitions. [2021-03-10 21:34:35,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 21:34:35,366 INFO L276 IsEmpty]: Start isEmpty. Operand 131917 states and 396879 transitions. [2021-03-10 21:34:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:34:35,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:35,411 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:35,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10661 [2021-03-10 21:34:35,611 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:35,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1834694950, now seen corresponding path program 365 times [2021-03-10 21:34:35,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:35,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78137094] [2021-03-10 21:34:35,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:35,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78137094] [2021-03-10 21:34:35,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534792289] [2021-03-10 21:34:35,716 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 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:35,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:34:35,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:35,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:34:35,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:34:35,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:35,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-03-10 21:34:35,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016901639] [2021-03-10 21:34:35,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:34:35,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:35,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:34:35,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:34:35,786 INFO L87 Difference]: Start difference. First operand 131917 states and 396879 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 21:34:36,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:36,361 INFO L93 Difference]: Finished difference Result 133934 states and 401039 transitions. [2021-03-10 21:34:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:34:36,362 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 24 [2021-03-10 21:34:36,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted.