/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/loop-tiling-eq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:13:41,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:13:41,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:13:41,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 21:13:41,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 21:13:41,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 21:13:41,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 21:13:41,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 21:13:41,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 21:13:41,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 21:13:41,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 21:13:41,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 21:13:41,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 21:13:41,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 21:13:41,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 21:13:41,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 21:13:41,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 21:13:41,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 21:13:41,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 21:13:41,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 21:13:41,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 21:13:41,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 21:13:41,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 21:13:41,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 21:13:41,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 21:13:41,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 21:13:41,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 21:13:41,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 21:13:41,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 21:13:41,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-10 21:13:41,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 21:13:41,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 21:13:41,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 21:13:41,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 21:13:41,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 21:13:41,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 21:13:41,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 21:13:41,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 21:13:41,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 21:13:41,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 21:13:41,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 21:13:41,410 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 21:13:41,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:13:41,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:13:41,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:13:41,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:13:41,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:13:41,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:13:41,451 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:13:41,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:13:41,451 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:13:41,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:13:41,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:13:41,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:13:41,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:13:41,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:13:41,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:13:41,453 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:13:41,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:13:41,453 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:13:41,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:13:41,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:13:41,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:13:41,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:13:41,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:13:41,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:13:41,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:13:41,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:13:41,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:13:41,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:13:41,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:13:41,455 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:13:41,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:13:41,455 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:13:41,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:13:41,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:13:41,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:13:41,762 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:13:41,763 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:13:41,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/loop-tiling-eq.wvr.bpl [2021-03-10 21:13:41,764 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/loop-tiling-eq.wvr.bpl' [2021-03-10 21:13:41,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:13:41,800 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:13:41,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:13:41,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:13:41,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:13:41,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:41" (1/1) ... [2021-03-10 21:13:41,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:41" (1/1) ... [2021-03-10 21:13:41,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:13:41,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:13:41,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:13:41,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:13:41,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:41" (1/1) ... [2021-03-10 21:13:41,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:41" (1/1) ... [2021-03-10 21:13:41,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:41" (1/1) ... [2021-03-10 21:13:41,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:41" (1/1) ... [2021-03-10 21:13:41,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:41" (1/1) ... [2021-03-10 21:13:41,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:41" (1/1) ... [2021-03-10 21:13:41,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:41" (1/1) ... [2021-03-10 21:13:41,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:13:41,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:13:41,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:13:41,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:13:41,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:41" (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 21:13:41,909 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:13:41,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:13:41,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:13:41,910 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:13:41,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:13:41,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:13:41,910 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:13:41,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:13:41,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:13:41,911 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 21:13:42,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:13:42,210 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-03-10 21:13:42,211 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-10 21:13:42,218 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-03-10 21:13:42,219 INFO L202 PluginConnector]: Adding new model loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:13:42 BoogieIcfgContainer [2021-03-10 21:13:42,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:13:42,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:13:42,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:13:42,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:13:42,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:41" (1/2) ... [2021-03-10 21:13:42,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@847acf7 and model type loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:13:42, skipping insertion in model container [2021-03-10 21:13:42,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:13:42" (2/2) ... [2021-03-10 21:13:42,224 INFO L111 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.bpl [2021-03-10 21:13:42,229 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:13:42,229 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:13:42,251 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:13:42,252 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:13:42,273 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:13:42,287 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:13:42,303 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:13:42,303 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:13:42,304 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:13:42,304 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:13:42,304 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:13:42,304 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:13:42,304 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:13:42,304 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:13:42,311 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 22 places, 18 transitions, 52 flow [2021-03-10 21:13:42,319 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:42,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:13:42,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:42,326 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:42,326 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:42,330 INFO L82 PathProgramCache]: Analyzing trace with hash -37685658, now seen corresponding path program 1 times [2021-03-10 21:13:42,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:42,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018444341] [2021-03-10 21:13:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:42,394 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:42,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213159615] [2021-03-10 21:13:42,395 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 21:13:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:42,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:13:42,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:42,511 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 21:13:42,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018444341] [2021-03-10 21:13:42,512 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:42,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213159615] [2021-03-10 21:13:42,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:42,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:13:42,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731489518] [2021-03-10 21:13:42,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:13:42,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:42,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:13:42,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:13:42,528 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 21:13:42,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:42,561 INFO L93 Difference]: Finished difference Result 36 states and 75 transitions. [2021-03-10 21:13:42,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:13:42,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 21:13:42,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:42,569 INFO L225 Difference]: With dead ends: 36 [2021-03-10 21:13:42,569 INFO L226 Difference]: Without dead ends: 31 [2021-03-10 21:13:42,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-03-10 21:13:42,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-03-10 21:13:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 54 transitions. [2021-03-10 21:13:42,595 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 54 transitions. Word has length 10 [2021-03-10 21:13:42,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:42,596 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 54 transitions. [2021-03-10 21:13:42,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 21:13:42,596 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 54 transitions. [2021-03-10 21:13:42,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:13:42,597 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:42,597 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:42,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-03-10 21:13:42,815 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:42,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1889973719, now seen corresponding path program 1 times [2021-03-10 21:13:42,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:42,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152593516] [2021-03-10 21:13:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:42,824 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:42,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908974733] [2021-03-10 21:13:42,824 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 21:13:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:42,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:13:42,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:42,922 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 21:13:42,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152593516] [2021-03-10 21:13:42,923 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:42,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908974733] [2021-03-10 21:13:42,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:42,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:13:42,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251613940] [2021-03-10 21:13:42,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:13:42,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:42,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:13:42,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:13:42,926 INFO L87 Difference]: Start difference. First operand 27 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:42,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:42,944 INFO L93 Difference]: Finished difference Result 44 states and 95 transitions. [2021-03-10 21:13:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:13:42,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have 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 21:13:42,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:42,946 INFO L225 Difference]: With dead ends: 44 [2021-03-10 21:13:42,946 INFO L226 Difference]: Without dead ends: 31 [2021-03-10 21:13:42,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:42,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-03-10 21:13:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-03-10 21:13:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 62 transitions. [2021-03-10 21:13:42,951 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 62 transitions. Word has length 12 [2021-03-10 21:13:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:42,952 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 62 transitions. [2021-03-10 21:13:42,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 62 transitions. [2021-03-10 21:13:42,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:13:42,953 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:42,953 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:43,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:43,159 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:43,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:43,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1513355601, now seen corresponding path program 1 times [2021-03-10 21:13:43,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:43,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392717623] [2021-03-10 21:13:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:43,165 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:43,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343715651] [2021-03-10 21:13:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:43,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:13:43,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:43,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392717623] [2021-03-10 21:13:43,310 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:43,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343715651] [2021-03-10 21:13:43,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:43,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-03-10 21:13:43,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425501159] [2021-03-10 21:13:43,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:13:43,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:43,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:13:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:13:43,312 INFO L87 Difference]: Start difference. First operand 31 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 21:13:43,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:43,398 INFO L93 Difference]: Finished difference Result 63 states and 124 transitions. [2021-03-10 21:13:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:13:43,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 13 [2021-03-10 21:13:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:43,402 INFO L225 Difference]: With dead ends: 63 [2021-03-10 21:13:43,402 INFO L226 Difference]: Without dead ends: 38 [2021-03-10 21:13:43,403 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-03-10 21:13:43,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-03-10 21:13:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 77 transitions. [2021-03-10 21:13:43,409 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 77 transitions. Word has length 13 [2021-03-10 21:13:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:43,409 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 77 transitions. [2021-03-10 21:13:43,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 21:13:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 77 transitions. [2021-03-10 21:13:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:43,410 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:43,410 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:43,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:43,634 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:43,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1697007933, now seen corresponding path program 1 times [2021-03-10 21:13:43,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:43,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518612200] [2021-03-10 21:13:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:43,650 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:43,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918546592] [2021-03-10 21:13:43,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:13:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:43,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:43,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:43,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:43,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:43,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:43,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:43,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:7 [2021-03-10 21:13:43,858 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-03-10 21:13:43,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-03-10 21:13:43,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:43,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:43,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:13:43,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:43,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:43,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:43,883 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:16 [2021-03-10 21:13:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:43,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518612200] [2021-03-10 21:13:43,984 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:43,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918546592] [2021-03-10 21:13:43,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:43,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:43,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689071960] [2021-03-10 21:13:43,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:43,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:43,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:43,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:43,988 INFO L87 Difference]: Start difference. First operand 38 states and 77 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:44,158 INFO L93 Difference]: Finished difference Result 63 states and 135 transitions. [2021-03-10 21:13:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:44,159 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:44,164 INFO L225 Difference]: With dead ends: 63 [2021-03-10 21:13:44,165 INFO L226 Difference]: Without dead ends: 59 [2021-03-10 21:13:44,165 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-03-10 21:13:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2021-03-10 21:13:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 98 transitions. [2021-03-10 21:13:44,179 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 98 transitions. Word has length 14 [2021-03-10 21:13:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:44,179 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 98 transitions. [2021-03-10 21:13:44,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 98 transitions. [2021-03-10 21:13:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:44,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:44,180 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:44,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:44,381 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:44,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:44,382 INFO L82 PathProgramCache]: Analyzing trace with hash 714269481, now seen corresponding path program 2 times [2021-03-10 21:13:44,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:44,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167127670] [2021-03-10 21:13:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:44,386 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:44,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494132520] [2021-03-10 21:13:44,386 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:44,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:44,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:44,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:44,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:44,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:44,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:44,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:44,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:44,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:13:44,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:13:44,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:44,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:44,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-03-10 21:13:44,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:44,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:44,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:44,581 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-03-10 21:13:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:44,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167127670] [2021-03-10 21:13:44,619 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:44,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494132520] [2021-03-10 21:13:44,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:44,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:44,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9453033] [2021-03-10 21:13:44,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:44,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:44,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:44,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:44,620 INFO L87 Difference]: Start difference. First operand 47 states and 98 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:44,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:44,716 INFO L93 Difference]: Finished difference Result 59 states and 121 transitions. [2021-03-10 21:13:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:44,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:44,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:44,718 INFO L225 Difference]: With dead ends: 59 [2021-03-10 21:13:44,718 INFO L226 Difference]: Without dead ends: 56 [2021-03-10 21:13:44,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-03-10 21:13:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-03-10 21:13:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 109 transitions. [2021-03-10 21:13:44,722 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 109 transitions. Word has length 14 [2021-03-10 21:13:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:44,723 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 109 transitions. [2021-03-10 21:13:44,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:44,723 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 109 transitions. [2021-03-10 21:13:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:44,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:44,724 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:44,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:44,945 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:44,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:44,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1862354109, now seen corresponding path program 3 times [2021-03-10 21:13:44,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:44,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339747450] [2021-03-10 21:13:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:44,949 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:44,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617064673] [2021-03-10 21:13:44,949 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:44,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:13:44,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:44,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:13:44,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:45,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:45,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:45,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:45,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:45,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:13:45,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:13:45,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:45,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:45,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-03-10 21:13:45,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:45,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:45,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:45,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2021-03-10 21:13:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:45,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339747450] [2021-03-10 21:13:45,213 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:45,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617064673] [2021-03-10 21:13:45,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:45,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:13:45,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477961992] [2021-03-10 21:13:45,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:45,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:45,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:45,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:45,215 INFO L87 Difference]: Start difference. First operand 52 states and 109 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:45,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:45,355 INFO L93 Difference]: Finished difference Result 72 states and 148 transitions. [2021-03-10 21:13:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:13:45,356 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:45,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:45,356 INFO L225 Difference]: With dead ends: 72 [2021-03-10 21:13:45,356 INFO L226 Difference]: Without dead ends: 66 [2021-03-10 21:13:45,357 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:45,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-03-10 21:13:45,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2021-03-10 21:13:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.173076923076923) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 113 transitions. [2021-03-10 21:13:45,361 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 113 transitions. Word has length 14 [2021-03-10 21:13:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:45,362 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 113 transitions. [2021-03-10 21:13:45,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:45,362 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 113 transitions. [2021-03-10 21:13:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:45,363 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:45,363 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:45,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:45,585 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:45,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:45,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1843920083, now seen corresponding path program 4 times [2021-03-10 21:13:45,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:45,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523425404] [2021-03-10 21:13:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:45,589 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:45,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496939576] [2021-03-10 21:13:45,590 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 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 21:13:45,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:45,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:45,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:45,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:45,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:45,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:45,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:45,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:45,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:13:45,677 INFO L446 ElimStorePlain]: Different costs {0=[v_A_15], 1=[F]} [2021-03-10 21:13:45,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:45,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:45,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:45,692 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-03-10 21:13:45,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2021-03-10 21:13:45,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:45,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:45,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:45,699 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:16 [2021-03-10 21:13:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:45,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523425404] [2021-03-10 21:13:45,747 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:45,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496939576] [2021-03-10 21:13:45,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:45,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:45,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692235965] [2021-03-10 21:13:45,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:45,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:45,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:45,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:45,749 INFO L87 Difference]: Start difference. First operand 53 states and 113 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:45,827 INFO L93 Difference]: Finished difference Result 68 states and 145 transitions. [2021-03-10 21:13:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:45,827 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:45,828 INFO L225 Difference]: With dead ends: 68 [2021-03-10 21:13:45,828 INFO L226 Difference]: Without dead ends: 65 [2021-03-10 21:13:45,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-03-10 21:13:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2021-03-10 21:13:45,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 117 transitions. [2021-03-10 21:13:45,832 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 117 transitions. Word has length 14 [2021-03-10 21:13:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:45,832 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 117 transitions. [2021-03-10 21:13:45,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:45,832 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 117 transitions. [2021-03-10 21:13:45,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:45,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:45,833 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:46,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:46,043 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:46,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:46,044 INFO L82 PathProgramCache]: Analyzing trace with hash -527762779, now seen corresponding path program 5 times [2021-03-10 21:13:46,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:46,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661889172] [2021-03-10 21:13:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:46,049 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:46,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020335073] [2021-03-10 21:13:46,049 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 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 21:13:46,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:13:46,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:46,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:46,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:46,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:46,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:46,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:46,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:46,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-03-10 21:13:46,133 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-03-10 21:13:46,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-03-10 21:13:46,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:46,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:46,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:13:46,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:46,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:46,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:46,150 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:16 [2021-03-10 21:13:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:46,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661889172] [2021-03-10 21:13:46,211 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:46,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020335073] [2021-03-10 21:13:46,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:46,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:46,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721332818] [2021-03-10 21:13:46,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:46,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:46,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:46,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:46,213 INFO L87 Difference]: Start difference. First operand 54 states and 117 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:46,312 INFO L93 Difference]: Finished difference Result 72 states and 155 transitions. [2021-03-10 21:13:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:46,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:46,314 INFO L225 Difference]: With dead ends: 72 [2021-03-10 21:13:46,314 INFO L226 Difference]: Without dead ends: 69 [2021-03-10 21:13:46,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-03-10 21:13:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2021-03-10 21:13:46,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:46,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 120 transitions. [2021-03-10 21:13:46,323 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 120 transitions. Word has length 14 [2021-03-10 21:13:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:46,323 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 120 transitions. [2021-03-10 21:13:46,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 120 transitions. [2021-03-10 21:13:46,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:46,324 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:46,324 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:46,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-03-10 21:13:46,531 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:46,532 INFO L82 PathProgramCache]: Analyzing trace with hash 545322601, now seen corresponding path program 6 times [2021-03-10 21:13:46,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:46,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784708867] [2021-03-10 21:13:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:46,536 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:46,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344912754] [2021-03-10 21:13:46,536 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 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 21:13:46,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:13:46,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:46,561 WARN L261 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:46,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:46,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:46,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:46,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:46,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:46,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:13:46,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-03-10 21:13:46,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:46,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:46,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:13:46,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:46,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:46,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:46,652 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-03-10 21:13:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:46,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784708867] [2021-03-10 21:13:46,734 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:46,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344912754] [2021-03-10 21:13:46,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:46,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:46,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416994497] [2021-03-10 21:13:46,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:46,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:46,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:46,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:46,735 INFO L87 Difference]: Start difference. First operand 55 states and 120 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:46,879 INFO L93 Difference]: Finished difference Result 94 states and 200 transitions. [2021-03-10 21:13:46,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:46,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:46,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:46,881 INFO L225 Difference]: With dead ends: 94 [2021-03-10 21:13:46,881 INFO L226 Difference]: Without dead ends: 91 [2021-03-10 21:13:46,881 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-03-10 21:13:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 58. [2021-03-10 21:13:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.280701754385965) internal successors, (130), 57 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2021-03-10 21:13:46,891 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 14 [2021-03-10 21:13:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:46,891 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2021-03-10 21:13:46,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2021-03-10 21:13:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:46,892 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:46,892 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:47,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:47,114 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:47,115 INFO L82 PathProgramCache]: Analyzing trace with hash -423779803, now seen corresponding path program 7 times [2021-03-10 21:13:47,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:47,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099628522] [2021-03-10 21:13:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:47,121 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:47,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575802579] [2021-03-10 21:13:47,121 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 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 21:13:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:47,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:47,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:47,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:47,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:47,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:47,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:47,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-03-10 21:13:47,200 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-03-10 21:13:47,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-03-10 21:13:47,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:47,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:47,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:13:47,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:47,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:47,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:47,215 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:16 [2021-03-10 21:13:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:47,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099628522] [2021-03-10 21:13:47,261 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:47,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575802579] [2021-03-10 21:13:47,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:47,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:47,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155905272] [2021-03-10 21:13:47,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:47,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:47,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:47,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:47,262 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:47,384 INFO L93 Difference]: Finished difference Result 90 states and 199 transitions. [2021-03-10 21:13:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:47,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:47,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:47,386 INFO L225 Difference]: With dead ends: 90 [2021-03-10 21:13:47,386 INFO L226 Difference]: Without dead ends: 87 [2021-03-10 21:13:47,386 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-03-10 21:13:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 58. [2021-03-10 21:13:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.280701754385965) internal successors, (130), 57 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2021-03-10 21:13:47,393 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 14 [2021-03-10 21:13:47,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:47,395 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2021-03-10 21:13:47,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2021-03-10 21:13:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:47,396 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:47,396 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:47,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:47,619 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:47,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:47,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2065847619, now seen corresponding path program 8 times [2021-03-10 21:13:47,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:47,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684869935] [2021-03-10 21:13:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:47,628 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:47,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21925669] [2021-03-10 21:13:47,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:47,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:47,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:47,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:47,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:47,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:47,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:47,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:47,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:47,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:13:47,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:13:47,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:47,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:47,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-03-10 21:13:47,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:47,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:47,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:47,750 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-03-10 21:13:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:47,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684869935] [2021-03-10 21:13:47,775 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:47,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21925669] [2021-03-10 21:13:47,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:47,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:47,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829718182] [2021-03-10 21:13:47,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:47,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:47,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:47,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:47,776 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:47,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:47,881 INFO L93 Difference]: Finished difference Result 104 states and 229 transitions. [2021-03-10 21:13:47,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:47,881 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:47,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:47,882 INFO L225 Difference]: With dead ends: 104 [2021-03-10 21:13:47,882 INFO L226 Difference]: Without dead ends: 98 [2021-03-10 21:13:47,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-03-10 21:13:47,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-03-10 21:13:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.283333333333333) internal successors, (137), 60 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 137 transitions. [2021-03-10 21:13:47,885 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 137 transitions. Word has length 14 [2021-03-10 21:13:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:47,885 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 137 transitions. [2021-03-10 21:13:47,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 137 transitions. [2021-03-10 21:13:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:47,886 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:47,886 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:48,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 21:13:48,104 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:48,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2084281645, now seen corresponding path program 9 times [2021-03-10 21:13:48,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:48,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202878240] [2021-03-10 21:13:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:48,109 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:48,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219026516] [2021-03-10 21:13:48,109 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:48,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:13:48,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:13:48,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:48,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:48,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:48,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:48,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:48,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:13:48,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:48,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:48,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:48,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:13:48,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:48,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:48,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:48,258 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2021-03-10 21:13:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:48,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202878240] [2021-03-10 21:13:48,302 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:48,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219026516] [2021-03-10 21:13:48,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:48,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:13:48,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979685953] [2021-03-10 21:13:48,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:48,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:48,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:48,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:48,303 INFO L87 Difference]: Start difference. First operand 61 states and 137 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:48,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:48,445 INFO L93 Difference]: Finished difference Result 106 states and 235 transitions. [2021-03-10 21:13:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:13:48,446 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:48,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:48,447 INFO L225 Difference]: With dead ends: 106 [2021-03-10 21:13:48,447 INFO L226 Difference]: Without dead ends: 103 [2021-03-10 21:13:48,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:48,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-03-10 21:13:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2021-03-10 21:13:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 61 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 140 transitions. [2021-03-10 21:13:48,452 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 140 transitions. Word has length 14 [2021-03-10 21:13:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:48,452 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 140 transitions. [2021-03-10 21:13:48,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 140 transitions. [2021-03-10 21:13:48,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:48,454 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:48,454 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:48,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:48,667 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:48,668 INFO L82 PathProgramCache]: Analyzing trace with hash -492341945, now seen corresponding path program 10 times [2021-03-10 21:13:48,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:48,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487226572] [2021-03-10 21:13:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:48,672 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:48,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858164634] [2021-03-10 21:13:48,672 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:48,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:48,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:48,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:48,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:48,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:48,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:48,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:48,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:48,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:13:48,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:48,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:48,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:48,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:13:48,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:48,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:48,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:48,778 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-03-10 21:13:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:48,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487226572] [2021-03-10 21:13:48,814 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:48,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858164634] [2021-03-10 21:13:48,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:48,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:48,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914478314] [2021-03-10 21:13:48,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:48,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:48,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:48,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:48,816 INFO L87 Difference]: Start difference. First operand 62 states and 140 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:48,931 INFO L93 Difference]: Finished difference Result 122 states and 266 transitions. [2021-03-10 21:13:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:48,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:48,933 INFO L225 Difference]: With dead ends: 122 [2021-03-10 21:13:48,933 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 21:13:48,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 21:13:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 62. [2021-03-10 21:13:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 61 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 140 transitions. [2021-03-10 21:13:48,938 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 140 transitions. Word has length 14 [2021-03-10 21:13:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:48,938 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 140 transitions. [2021-03-10 21:13:48,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 140 transitions. [2021-03-10 21:13:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:48,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:48,941 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:49,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 21:13:49,147 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:49,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1166331455, now seen corresponding path program 11 times [2021-03-10 21:13:49,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:49,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085075672] [2021-03-10 21:13:49,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:49,150 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:49,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49810448] [2021-03-10 21:13:49,150 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 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 21:13:49,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:13:49,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:49,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:49,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:49,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:49,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:49,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:49,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:49,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:13:49,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:49,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:49,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:49,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:13:49,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:49,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:49,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:49,272 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-03-10 21:13:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:49,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085075672] [2021-03-10 21:13:49,297 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:49,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49810448] [2021-03-10 21:13:49,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:49,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:49,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526155471] [2021-03-10 21:13:49,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:49,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:49,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:49,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:49,299 INFO L87 Difference]: Start difference. First operand 62 states and 140 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:49,408 INFO L93 Difference]: Finished difference Result 87 states and 197 transitions. [2021-03-10 21:13:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:49,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:49,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:49,410 INFO L225 Difference]: With dead ends: 87 [2021-03-10 21:13:49,410 INFO L226 Difference]: Without dead ends: 84 [2021-03-10 21:13:49,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-03-10 21:13:49,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-03-10 21:13:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 146 transitions. [2021-03-10 21:13:49,415 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 146 transitions. Word has length 14 [2021-03-10 21:13:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:49,415 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 146 transitions. [2021-03-10 21:13:49,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 146 transitions. [2021-03-10 21:13:49,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:49,416 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:49,416 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:49,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:49,623 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:49,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:49,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1410292135, now seen corresponding path program 12 times [2021-03-10 21:13:49,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:49,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752084862] [2021-03-10 21:13:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:49,629 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:49,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662838347] [2021-03-10 21:13:49,629 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 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 21:13:49,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:13:49,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:49,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:49,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:49,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:49,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:49,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:49,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:49,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:13:49,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:13:49,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:49,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:49,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-03-10 21:13:49,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:49,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:49,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:49,761 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-03-10 21:13:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:49,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752084862] [2021-03-10 21:13:49,841 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:49,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662838347] [2021-03-10 21:13:49,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:49,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:49,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822522808] [2021-03-10 21:13:49,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:49,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:49,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:49,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:49,843 INFO L87 Difference]: Start difference. First operand 64 states and 146 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:49,963 INFO L93 Difference]: Finished difference Result 97 states and 222 transitions. [2021-03-10 21:13:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:49,964 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:49,965 INFO L225 Difference]: With dead ends: 97 [2021-03-10 21:13:49,965 INFO L226 Difference]: Without dead ends: 94 [2021-03-10 21:13:49,967 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-03-10 21:13:49,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2021-03-10 21:13:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.306451612903226) internal successors, (143), 62 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 143 transitions. [2021-03-10 21:13:49,970 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 143 transitions. Word has length 14 [2021-03-10 21:13:49,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:49,971 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 143 transitions. [2021-03-10 21:13:49,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 143 transitions. [2021-03-10 21:13:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:49,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:49,971 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:50,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 21:13:50,179 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:50,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:50,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1391858109, now seen corresponding path program 13 times [2021-03-10 21:13:50,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:50,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44021254] [2021-03-10 21:13:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:50,184 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:50,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329236902] [2021-03-10 21:13:50,184 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 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 21:13:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:50,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:50,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:50,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:50,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:50,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:50,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:50,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:13:50,268 INFO L446 ElimStorePlain]: Different costs {0=[v_A_24], 1=[F]} [2021-03-10 21:13:50,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:50,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:50,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:50,284 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-03-10 21:13:50,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2021-03-10 21:13:50,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:50,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:50,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:50,293 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:16 [2021-03-10 21:13:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:50,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44021254] [2021-03-10 21:13:50,345 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:50,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329236902] [2021-03-10 21:13:50,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:50,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:50,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531659788] [2021-03-10 21:13:50,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:50,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:50,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:50,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:50,347 INFO L87 Difference]: Start difference. First operand 63 states and 143 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:50,436 INFO L93 Difference]: Finished difference Result 92 states and 212 transitions. [2021-03-10 21:13:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:50,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:50,437 INFO L225 Difference]: With dead ends: 92 [2021-03-10 21:13:50,437 INFO L226 Difference]: Without dead ends: 89 [2021-03-10 21:13:50,438 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:50,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-03-10 21:13:50,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-03-10 21:13:50,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.306451612903226) internal successors, (143), 62 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 143 transitions. [2021-03-10 21:13:50,440 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 143 transitions. Word has length 14 [2021-03-10 21:13:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:50,442 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 143 transitions. [2021-03-10 21:13:50,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 143 transitions. [2021-03-10 21:13:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:50,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:50,442 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:50,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 21:13:50,655 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:50,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:50,656 INFO L82 PathProgramCache]: Analyzing trace with hash 90620299, now seen corresponding path program 14 times [2021-03-10 21:13:50,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:50,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749990431] [2021-03-10 21:13:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:50,658 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:50,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038869421] [2021-03-10 21:13:50,658 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 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 21:13:50,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:50,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:50,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:50,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:50,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:50,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:50,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:50,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:50,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:13:50,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:13:50,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:50,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:50,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-03-10 21:13:50,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:50,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:50,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:50,786 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-03-10 21:13:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:50,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749990431] [2021-03-10 21:13:50,810 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:50,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038869421] [2021-03-10 21:13:50,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:50,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:50,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411953962] [2021-03-10 21:13:50,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:50,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:50,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:50,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:50,811 INFO L87 Difference]: Start difference. First operand 63 states and 143 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:50,910 INFO L93 Difference]: Finished difference Result 85 states and 190 transitions. [2021-03-10 21:13:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:50,910 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:50,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:50,911 INFO L225 Difference]: With dead ends: 85 [2021-03-10 21:13:50,911 INFO L226 Difference]: Without dead ends: 82 [2021-03-10 21:13:50,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:50,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-03-10 21:13:50,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-03-10 21:13:50,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.3230769230769233) internal successors, (151), 65 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 151 transitions. [2021-03-10 21:13:50,914 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 151 transitions. Word has length 14 [2021-03-10 21:13:50,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:50,914 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 151 transitions. [2021-03-10 21:13:50,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,914 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 151 transitions. [2021-03-10 21:13:50,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:50,915 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:50,915 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:51,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 21:13:51,131 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1808964005, now seen corresponding path program 15 times [2021-03-10 21:13:51,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:51,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902034550] [2021-03-10 21:13:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:51,135 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:51,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279129466] [2021-03-10 21:13:51,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:51,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:13:51,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:51,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:13:51,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:51,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:51,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:51,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:51,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:51,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:13:51,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:13:51,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:51,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:51,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-03-10 21:13:51,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:51,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:51,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:51,235 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2021-03-10 21:13:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:51,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902034550] [2021-03-10 21:13:51,294 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:51,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279129466] [2021-03-10 21:13:51,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:51,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:13:51,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899507080] [2021-03-10 21:13:51,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:51,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:51,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:51,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:51,296 INFO L87 Difference]: Start difference. First operand 66 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:51,455 INFO L93 Difference]: Finished difference Result 98 states and 217 transitions. [2021-03-10 21:13:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:13:51,455 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:51,457 INFO L225 Difference]: With dead ends: 98 [2021-03-10 21:13:51,457 INFO L226 Difference]: Without dead ends: 92 [2021-03-10 21:13:51,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:51,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-03-10 21:13:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-03-10 21:13:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.3125) internal successors, (148), 64 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 148 transitions. [2021-03-10 21:13:51,459 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 148 transitions. Word has length 14 [2021-03-10 21:13:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:51,460 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 148 transitions. [2021-03-10 21:13:51,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 148 transitions. [2021-03-10 21:13:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:51,460 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:51,460 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:51,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 21:13:51,675 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:51,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:51,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1827398031, now seen corresponding path program 16 times [2021-03-10 21:13:51,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:51,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304227723] [2021-03-10 21:13:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:51,678 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:51,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197888625] [2021-03-10 21:13:51,679 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 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 21:13:51,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:51,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:51,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:51,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:51,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:51,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:51,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:51,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:13:51,746 INFO L446 ElimStorePlain]: Different costs {0=[v_A_27], 1=[F]} [2021-03-10 21:13:51,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:51,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:51,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:51,768 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-03-10 21:13:51,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2021-03-10 21:13:51,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:51,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:51,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:51,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:16 [2021-03-10 21:13:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:51,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304227723] [2021-03-10 21:13:51,815 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:51,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197888625] [2021-03-10 21:13:51,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:51,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:51,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108058293] [2021-03-10 21:13:51,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:51,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:51,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:51,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:51,816 INFO L87 Difference]: Start difference. First operand 65 states and 148 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:51,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:51,897 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2021-03-10 21:13:51,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:51,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:51,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:51,898 INFO L225 Difference]: With dead ends: 90 [2021-03-10 21:13:51,898 INFO L226 Difference]: Without dead ends: 87 [2021-03-10 21:13:51,899 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-03-10 21:13:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 64. [2021-03-10 21:13:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 145 transitions. [2021-03-10 21:13:51,901 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 145 transitions. Word has length 14 [2021-03-10 21:13:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:51,901 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 145 transitions. [2021-03-10 21:13:51,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:51,901 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 145 transitions. [2021-03-10 21:13:51,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:51,901 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:51,901 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:52,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:52,118 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:52,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1151411961, now seen corresponding path program 17 times [2021-03-10 21:13:52,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:52,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690046791] [2021-03-10 21:13:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:52,128 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:52,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4760203] [2021-03-10 21:13:52,129 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:52,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:13:52,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:52,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:52,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:52,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:52,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:52,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:52,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:52,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-03-10 21:13:52,214 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-03-10 21:13:52,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-03-10 21:13:52,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:52,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:52,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:13:52,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:52,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:52,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:52,230 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:16 [2021-03-10 21:13:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:52,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690046791] [2021-03-10 21:13:52,282 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:52,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4760203] [2021-03-10 21:13:52,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:52,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:52,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803850592] [2021-03-10 21:13:52,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:52,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:52,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:52,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:52,284 INFO L87 Difference]: Start difference. First operand 64 states and 145 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:52,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:52,340 INFO L93 Difference]: Finished difference Result 92 states and 208 transitions. [2021-03-10 21:13:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:52,340 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:52,342 INFO L225 Difference]: With dead ends: 92 [2021-03-10 21:13:52,342 INFO L226 Difference]: Without dead ends: 89 [2021-03-10 21:13:52,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:52,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-03-10 21:13:52,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-03-10 21:13:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.306451612903226) internal successors, (143), 62 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 143 transitions. [2021-03-10 21:13:52,344 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 143 transitions. Word has length 14 [2021-03-10 21:13:52,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:52,344 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 143 transitions. [2021-03-10 21:13:52,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 143 transitions. [2021-03-10 21:13:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:52,345 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:52,345 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:52,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:52,559 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:52,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2097562877, now seen corresponding path program 18 times [2021-03-10 21:13:52,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:52,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436124716] [2021-03-10 21:13:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:52,565 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:52,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036839467] [2021-03-10 21:13:52,565 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 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 21:13:52,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:13:52,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:52,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:52,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:52,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:52,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:52,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:52,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:52,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:13:52,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-03-10 21:13:52,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:52,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:52,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-03-10 21:13:52,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:52,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:52,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:52,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-03-10 21:13:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:52,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436124716] [2021-03-10 21:13:52,740 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:52,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036839467] [2021-03-10 21:13:52,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:52,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:52,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235176018] [2021-03-10 21:13:52,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:52,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:52,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:52,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:52,741 INFO L87 Difference]: Start difference. First operand 63 states and 143 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:52,860 INFO L93 Difference]: Finished difference Result 87 states and 196 transitions. [2021-03-10 21:13:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:52,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:52,861 INFO L225 Difference]: With dead ends: 87 [2021-03-10 21:13:52,861 INFO L226 Difference]: Without dead ends: 84 [2021-03-10 21:13:52,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-03-10 21:13:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-03-10 21:13:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.3230769230769233) internal successors, (151), 65 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 151 transitions. [2021-03-10 21:13:52,863 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 151 transitions. Word has length 14 [2021-03-10 21:13:52,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:52,863 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 151 transitions. [2021-03-10 21:13:52,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:52,864 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 151 transitions. [2021-03-10 21:13:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:52,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:52,865 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:53,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 21:13:53,083 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:53,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash -379219171, now seen corresponding path program 19 times [2021-03-10 21:13:53,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:53,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112687085] [2021-03-10 21:13:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:53,086 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:53,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2595109] [2021-03-10 21:13:53,086 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 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 21:13:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:53,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:53,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:53,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:53,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:53,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:53,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:53,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:13:53,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:53,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:53,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:53,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:13:53,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:53,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:53,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:53,179 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-03-10 21:13:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:53,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112687085] [2021-03-10 21:13:53,213 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:53,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2595109] [2021-03-10 21:13:53,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:53,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:53,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860228290] [2021-03-10 21:13:53,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:53,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:53,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:53,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:53,214 INFO L87 Difference]: Start difference. First operand 66 states and 151 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:53,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:53,337 INFO L93 Difference]: Finished difference Result 97 states and 221 transitions. [2021-03-10 21:13:53,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:53,338 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:53,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:53,338 INFO L225 Difference]: With dead ends: 97 [2021-03-10 21:13:53,338 INFO L226 Difference]: Without dead ends: 94 [2021-03-10 21:13:53,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:53,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-03-10 21:13:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2021-03-10 21:13:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.3125) internal successors, (148), 64 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 148 transitions. [2021-03-10 21:13:53,341 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 148 transitions. Word has length 14 [2021-03-10 21:13:53,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:53,341 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 148 transitions. [2021-03-10 21:13:53,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:53,341 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 148 transitions. [2021-03-10 21:13:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:53,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:53,341 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:53,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:53,563 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:53,563 INFO L82 PathProgramCache]: Analyzing trace with hash -360785145, now seen corresponding path program 20 times [2021-03-10 21:13:53,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:53,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039485541] [2021-03-10 21:13:53,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:53,565 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:53,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983657772] [2021-03-10 21:13:53,566 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 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 21:13:53,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:53,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:53,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:53,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:53,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:53,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:53,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:53,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:53,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:13:53,637 INFO L446 ElimStorePlain]: Different costs {0=[v_A_31], 1=[F]} [2021-03-10 21:13:53,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:53,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:53,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:53,654 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-03-10 21:13:53,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2021-03-10 21:13:53,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:53,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:53,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:53,661 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:16 [2021-03-10 21:13:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:53,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039485541] [2021-03-10 21:13:53,699 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:53,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983657772] [2021-03-10 21:13:53,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:53,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:53,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143397016] [2021-03-10 21:13:53,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:53,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:53,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:53,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:53,700 INFO L87 Difference]: Start difference. First operand 65 states and 148 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:53,775 INFO L93 Difference]: Finished difference Result 92 states and 211 transitions. [2021-03-10 21:13:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:53,776 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:53,776 INFO L225 Difference]: With dead ends: 92 [2021-03-10 21:13:53,776 INFO L226 Difference]: Without dead ends: 89 [2021-03-10 21:13:53,776 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-03-10 21:13:53,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2021-03-10 21:13:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 145 transitions. [2021-03-10 21:13:53,778 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 145 transitions. Word has length 14 [2021-03-10 21:13:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:53,779 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 145 transitions. [2021-03-10 21:13:53,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 145 transitions. [2021-03-10 21:13:53,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:53,779 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:53,779 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:53,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 21:13:53,996 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:53,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:53,996 INFO L82 PathProgramCache]: Analyzing trace with hash 955372159, now seen corresponding path program 21 times [2021-03-10 21:13:53,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:53,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986047162] [2021-03-10 21:13:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:53,999 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:53,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451875220] [2021-03-10 21:13:53,999 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 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 21:13:54,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:13:54,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:54,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:13:54,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:54,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:54,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:54,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:54,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:54,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-03-10 21:13:54,091 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-03-10 21:13:54,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-03-10 21:13:54,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:54,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:54,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:13:54,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:54,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:54,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:54,108 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:35, output treesize:22 [2021-03-10 21:13:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:54,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986047162] [2021-03-10 21:13:54,172 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:54,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451875220] [2021-03-10 21:13:54,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:54,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:13:54,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594740124] [2021-03-10 21:13:54,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:54,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:54,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:54,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:54,173 INFO L87 Difference]: Start difference. First operand 64 states and 145 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:54,312 INFO L93 Difference]: Finished difference Result 97 states and 216 transitions. [2021-03-10 21:13:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:13:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:54,313 INFO L225 Difference]: With dead ends: 97 [2021-03-10 21:13:54,313 INFO L226 Difference]: Without dead ends: 91 [2021-03-10 21:13:54,313 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:54,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-03-10 21:13:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2021-03-10 21:13:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.3125) internal successors, (148), 64 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 148 transitions. [2021-03-10 21:13:54,315 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 148 transitions. Word has length 14 [2021-03-10 21:13:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:54,315 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 148 transitions. [2021-03-10 21:13:54,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 148 transitions. [2021-03-10 21:13:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:54,316 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:54,316 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:54,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:54,537 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:54,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2028457539, now seen corresponding path program 22 times [2021-03-10 21:13:54,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:54,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066234312] [2021-03-10 21:13:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:54,542 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:54,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900399118] [2021-03-10 21:13:54,542 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 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 21:13:54,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:54,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:54,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:13:54,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:54,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:13:54,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:54,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:54,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:54,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-03-10 21:13:54,620 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-03-10 21:13:54,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-03-10 21:13:54,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:54,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:54,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:13:54,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:54,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:54,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:54,647 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:16 [2021-03-10 21:13:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:54,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066234312] [2021-03-10 21:13:54,690 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:54,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900399118] [2021-03-10 21:13:54,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:54,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:54,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654674828] [2021-03-10 21:13:54,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:54,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:54,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:54,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:54,691 INFO L87 Difference]: Start difference. First operand 65 states and 148 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:54,784 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2021-03-10 21:13:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:54,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:54,785 INFO L225 Difference]: With dead ends: 105 [2021-03-10 21:13:54,786 INFO L226 Difference]: Without dead ends: 102 [2021-03-10 21:13:54,786 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-03-10 21:13:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2021-03-10 21:13:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.3125) internal successors, (148), 64 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 148 transitions. [2021-03-10 21:13:54,788 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 148 transitions. Word has length 14 [2021-03-10 21:13:54,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:54,788 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 148 transitions. [2021-03-10 21:13:54,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,788 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 148 transitions. [2021-03-10 21:13:54,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:54,788 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:54,789 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:54,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 21:13:54,989 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:54,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1040637117, now seen corresponding path program 23 times [2021-03-10 21:13:54,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:54,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173511186] [2021-03-10 21:13:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:54,993 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:54,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494140497] [2021-03-10 21:13:54,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:55,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:13:55,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:55,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:13:55,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:55,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173511186] [2021-03-10 21:13:55,097 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:55,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494140497] [2021-03-10 21:13:55,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:55,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-03-10 21:13:55,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585981523] [2021-03-10 21:13:55,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:13:55,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:55,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:13:55,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:55,101 INFO L87 Difference]: Start difference. First operand 65 states and 148 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:13:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:55,187 INFO L93 Difference]: Finished difference Result 131 states and 281 transitions. [2021-03-10 21:13:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:55,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2021-03-10 21:13:55,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:55,188 INFO L225 Difference]: With dead ends: 131 [2021-03-10 21:13:55,188 INFO L226 Difference]: Without dead ends: 122 [2021-03-10 21:13:55,188 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:55,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-03-10 21:13:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2021-03-10 21:13:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.326923076923077) internal successors, (242), 104 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 242 transitions. [2021-03-10 21:13:55,192 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 242 transitions. Word has length 15 [2021-03-10 21:13:55,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:55,192 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 242 transitions. [2021-03-10 21:13:55,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:13:55,192 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 242 transitions. [2021-03-10 21:13:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:55,193 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:55,193 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:55,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 21:13:55,393 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:55,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:55,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2064358339, now seen corresponding path program 24 times [2021-03-10 21:13:55,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:55,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860331898] [2021-03-10 21:13:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:55,397 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:55,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269347052] [2021-03-10 21:13:55,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:55,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:13:55,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:55,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:13:55,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:55,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860331898] [2021-03-10 21:13:55,513 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:55,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269347052] [2021-03-10 21:13:55,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:55,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-03-10 21:13:55,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197461234] [2021-03-10 21:13:55,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:55,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:55,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:55,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:55,514 INFO L87 Difference]: Start difference. First operand 105 states and 242 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 21:13:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:55,713 INFO L93 Difference]: Finished difference Result 172 states and 363 transitions. [2021-03-10 21:13:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:13:55,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 15 [2021-03-10 21:13:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:55,714 INFO L225 Difference]: With dead ends: 172 [2021-03-10 21:13:55,714 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 21:13:55,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:55,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 21:13:55,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 125. [2021-03-10 21:13:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.346774193548387) internal successors, (291), 124 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 291 transitions. [2021-03-10 21:13:55,718 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 291 transitions. Word has length 15 [2021-03-10 21:13:55,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:55,718 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 291 transitions. [2021-03-10 21:13:55,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 21:13:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 291 transitions. [2021-03-10 21:13:55,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:55,719 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:55,719 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:55,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 21:13:55,931 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:55,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1261506553, now seen corresponding path program 25 times [2021-03-10 21:13:55,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:55,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474238731] [2021-03-10 21:13:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:55,941 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:55,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717451572] [2021-03-10 21:13:55,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:55,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:55,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:56,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474238731] [2021-03-10 21:13:56,056 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:56,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717451572] [2021-03-10 21:13:56,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:56,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:13:56,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450319395] [2021-03-10 21:13:56,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:56,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:56,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:56,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:56,057 INFO L87 Difference]: Start difference. First operand 125 states and 291 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:13:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:56,272 INFO L93 Difference]: Finished difference Result 176 states and 393 transitions. [2021-03-10 21:13:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:13:56,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:13:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:56,274 INFO L225 Difference]: With dead ends: 176 [2021-03-10 21:13:56,274 INFO L226 Difference]: Without dead ends: 171 [2021-03-10 21:13:56,274 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-03-10 21:13:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 139. [2021-03-10 21:13:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.4057971014492754) internal successors, (332), 138 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 332 transitions. [2021-03-10 21:13:56,278 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 332 transitions. Word has length 15 [2021-03-10 21:13:56,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:56,279 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 332 transitions. [2021-03-10 21:13:56,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:13:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 332 transitions. [2021-03-10 21:13:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:56,279 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:56,279 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:56,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 21:13:56,501 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:56,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:56,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1279940579, now seen corresponding path program 26 times [2021-03-10 21:13:56,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:56,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738743095] [2021-03-10 21:13:56,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:56,505 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:56,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143327185] [2021-03-10 21:13:56,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:56,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:56,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:56,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:13:56,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:56,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738743095] [2021-03-10 21:13:56,604 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:56,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143327185] [2021-03-10 21:13:56,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:56,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-03-10 21:13:56,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077990601] [2021-03-10 21:13:56,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:13:56,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:56,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:13:56,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:56,605 INFO L87 Difference]: Start difference. First operand 139 states and 332 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:13:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:56,681 INFO L93 Difference]: Finished difference Result 205 states and 453 transitions. [2021-03-10 21:13:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:56,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2021-03-10 21:13:56,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:56,682 INFO L225 Difference]: With dead ends: 205 [2021-03-10 21:13:56,682 INFO L226 Difference]: Without dead ends: 184 [2021-03-10 21:13:56,682 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-03-10 21:13:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 141. [2021-03-10 21:13:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.4214285714285713) internal successors, (339), 140 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2021-03-10 21:13:56,687 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 15 [2021-03-10 21:13:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:56,687 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2021-03-10 21:13:56,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:13:56,687 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2021-03-10 21:13:56,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:56,687 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:56,687 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:56,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 21:13:56,903 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:56,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:56,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1851395385, now seen corresponding path program 27 times [2021-03-10 21:13:56,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:56,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359098235] [2021-03-10 21:13:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:56,907 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:56,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781742159] [2021-03-10 21:13:56,908 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:56,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:13:56,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:56,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:13:56,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:57,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359098235] [2021-03-10 21:13:57,007 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:57,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781742159] [2021-03-10 21:13:57,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:57,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-03-10 21:13:57,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613003593] [2021-03-10 21:13:57,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:13:57,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:57,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:13:57,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:57,008 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:13:57,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:57,109 INFO L93 Difference]: Finished difference Result 202 states and 430 transitions. [2021-03-10 21:13:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:57,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2021-03-10 21:13:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:57,110 INFO L225 Difference]: With dead ends: 202 [2021-03-10 21:13:57,110 INFO L226 Difference]: Without dead ends: 187 [2021-03-10 21:13:57,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-03-10 21:13:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 131. [2021-03-10 21:13:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.4461538461538463) internal successors, (318), 130 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 318 transitions. [2021-03-10 21:13:57,114 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 318 transitions. Word has length 15 [2021-03-10 21:13:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:57,114 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 318 transitions. [2021-03-10 21:13:57,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:13:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 318 transitions. [2021-03-10 21:13:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:57,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:57,115 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:57,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:57,335 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:57,335 INFO L82 PathProgramCache]: Analyzing trace with hash 51628827, now seen corresponding path program 28 times [2021-03-10 21:13:57,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:57,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498750505] [2021-03-10 21:13:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:57,338 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:57,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959207067] [2021-03-10 21:13:57,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:57,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:57,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:57,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:13:57,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:57,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498750505] [2021-03-10 21:13:57,438 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:57,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959207067] [2021-03-10 21:13:57,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:57,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:13:57,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437047551] [2021-03-10 21:13:57,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:57,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:57,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:57,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:57,439 INFO L87 Difference]: Start difference. First operand 131 states and 318 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:13:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:57,527 INFO L93 Difference]: Finished difference Result 140 states and 332 transitions. [2021-03-10 21:13:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:13:57,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:13:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:57,528 INFO L225 Difference]: With dead ends: 140 [2021-03-10 21:13:57,528 INFO L226 Difference]: Without dead ends: 137 [2021-03-10 21:13:57,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-03-10 21:13:57,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2021-03-10 21:13:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.450381679389313) internal successors, (321), 131 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:57,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 321 transitions. [2021-03-10 21:13:57,532 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 321 transitions. Word has length 15 [2021-03-10 21:13:57,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:57,532 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 321 transitions. [2021-03-10 21:13:57,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:13:57,532 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 321 transitions. [2021-03-10 21:13:57,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:57,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:57,532 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:57,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:57,755 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:57,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:57,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1769972533, now seen corresponding path program 29 times [2021-03-10 21:13:57,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:57,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704406435] [2021-03-10 21:13:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:57,758 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:57,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260762260] [2021-03-10 21:13:57,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:57,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:13:57,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:57,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:13:57,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:57,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704406435] [2021-03-10 21:13:57,874 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:57,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260762260] [2021-03-10 21:13:57,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:57,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:13:57,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665467397] [2021-03-10 21:13:57,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:57,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:57,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:57,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:57,875 INFO L87 Difference]: Start difference. First operand 132 states and 321 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:13:58,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:58,010 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2021-03-10 21:13:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:13:58,010 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:13:58,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:58,011 INFO L225 Difference]: With dead ends: 168 [2021-03-10 21:13:58,011 INFO L226 Difference]: Without dead ends: 165 [2021-03-10 21:13:58,011 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-03-10 21:13:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 133. [2021-03-10 21:13:58,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.462121212121212) internal successors, (325), 132 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 325 transitions. [2021-03-10 21:13:58,019 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 325 transitions. Word has length 15 [2021-03-10 21:13:58,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:58,019 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 325 transitions. [2021-03-10 21:13:58,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:13:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 325 transitions. [2021-03-10 21:13:58,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:58,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:58,019 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:58,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-03-10 21:13:58,235 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:58,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:58,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1659150013, now seen corresponding path program 30 times [2021-03-10 21:13:58,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:58,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33896] [2021-03-10 21:13:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:58,238 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:58,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766425832] [2021-03-10 21:13:58,238 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 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 21:13:58,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:13:58,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:58,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:13:58,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:58,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33896] [2021-03-10 21:13:58,377 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:58,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766425832] [2021-03-10 21:13:58,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:58,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:13:58,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781591287] [2021-03-10 21:13:58,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:58,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:58,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:58,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:58,379 INFO L87 Difference]: Start difference. First operand 133 states and 325 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:13:58,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:58,485 INFO L93 Difference]: Finished difference Result 162 states and 388 transitions. [2021-03-10 21:13:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:13:58,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:13:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:58,486 INFO L225 Difference]: With dead ends: 162 [2021-03-10 21:13:58,486 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 21:13:58,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:58,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 21:13:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 131. [2021-03-10 21:13:58,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.4461538461538463) internal successors, (318), 130 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 318 transitions. [2021-03-10 21:13:58,491 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 318 transitions. Word has length 15 [2021-03-10 21:13:58,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:58,491 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 318 transitions. [2021-03-10 21:13:58,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:13:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 318 transitions. [2021-03-10 21:13:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:58,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:58,492 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:58,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:58,707 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:58,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:58,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1788406559, now seen corresponding path program 31 times [2021-03-10 21:13:58,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:58,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773864599] [2021-03-10 21:13:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:58,709 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:58,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698728338] [2021-03-10 21:13:58,710 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 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 21:13:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:58,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:13:58,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:58,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773864599] [2021-03-10 21:13:58,835 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:58,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698728338] [2021-03-10 21:13:58,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:58,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:13:58,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977046515] [2021-03-10 21:13:58,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:58,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:58,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:58,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:58,836 INFO L87 Difference]: Start difference. First operand 131 states and 318 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:13:58,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:58,954 INFO L93 Difference]: Finished difference Result 171 states and 401 transitions. [2021-03-10 21:13:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:13:58,954 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:13:58,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:58,958 INFO L225 Difference]: With dead ends: 171 [2021-03-10 21:13:58,958 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 21:13:58,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:58,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 21:13:58,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 133. [2021-03-10 21:13:58,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.4696969696969697) internal successors, (326), 132 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:58,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 326 transitions. [2021-03-10 21:13:58,962 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 326 transitions. Word has length 15 [2021-03-10 21:13:58,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:58,962 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 326 transitions. [2021-03-10 21:13:58,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:13:58,962 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 326 transitions. [2021-03-10 21:13:58,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:58,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:58,963 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:59,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 21:13:59,179 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:59,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:59,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1677584039, now seen corresponding path program 32 times [2021-03-10 21:13:59,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:59,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348334682] [2021-03-10 21:13:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:59,182 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:59,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169648526] [2021-03-10 21:13:59,182 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 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 21:13:59,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:59,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:59,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:13:59,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:59,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348334682] [2021-03-10 21:13:59,304 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:59,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169648526] [2021-03-10 21:13:59,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:59,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:13:59,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971914819] [2021-03-10 21:13:59,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:59,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:59,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:59,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:59,305 INFO L87 Difference]: Start difference. First operand 133 states and 326 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:13:59,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:59,442 INFO L93 Difference]: Finished difference Result 165 states and 395 transitions. [2021-03-10 21:13:59,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:13:59,442 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:13:59,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:59,443 INFO L225 Difference]: With dead ends: 165 [2021-03-10 21:13:59,443 INFO L226 Difference]: Without dead ends: 162 [2021-03-10 21:13:59,443 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:59,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-03-10 21:13:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-03-10 21:13:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.4580152671755724) internal successors, (322), 131 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 322 transitions. [2021-03-10 21:13:59,446 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 322 transitions. Word has length 15 [2021-03-10 21:13:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:59,447 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 322 transitions. [2021-03-10 21:13:59,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:13:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 322 transitions. [2021-03-10 21:13:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:59,447 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:59,447 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:59,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:59,648 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:59,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:59,648 INFO L82 PathProgramCache]: Analyzing trace with hash 685977243, now seen corresponding path program 33 times [2021-03-10 21:13:59,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:59,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865002803] [2021-03-10 21:13:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:59,651 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:13:59,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119531565] [2021-03-10 21:13:59,651 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 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 21:13:59,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:13:59,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:59,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:13:59,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:59,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:13:59,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:59,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:59,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:59,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:13:59,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:13:59,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:59,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:59,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:59,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:30 [2021-03-10 21:13:59,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:13:59,782 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:13:59,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:59,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:13:59,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:13:59,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:13:59,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:13:59,797 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:16 [2021-03-10 21:13:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:59,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865002803] [2021-03-10 21:13:59,818 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:13:59,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119531565] [2021-03-10 21:13:59,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:13:59,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:13:59,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904067907] [2021-03-10 21:13:59,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:59,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:59,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:59,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:59,818 INFO L87 Difference]: Start difference. First operand 132 states and 322 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:13:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:59,898 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2021-03-10 21:13:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:13:59,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:13:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:59,899 INFO L225 Difference]: With dead ends: 142 [2021-03-10 21:13:59,899 INFO L226 Difference]: Without dead ends: 139 [2021-03-10 21:13:59,899 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:59,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-03-10 21:13:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2021-03-10 21:13:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.4511278195488724) internal successors, (326), 133 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 326 transitions. [2021-03-10 21:13:59,903 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 326 transitions. Word has length 15 [2021-03-10 21:13:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:59,903 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 326 transitions. [2021-03-10 21:13:59,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:13:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 326 transitions. [2021-03-10 21:13:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:59,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:59,903 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:00,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 21:14:00,124 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:00,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1879942719, now seen corresponding path program 34 times [2021-03-10 21:14:00,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:00,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473276493] [2021-03-10 21:14:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:00,126 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:00,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377053434] [2021-03-10 21:14:00,127 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 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 21:14:00,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:00,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:00,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:00,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:00,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473276493] [2021-03-10 21:14:00,231 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:00,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377053434] [2021-03-10 21:14:00,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:00,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:00,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200787696] [2021-03-10 21:14:00,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:00,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:00,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:00,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:00,232 INFO L87 Difference]: Start difference. First operand 134 states and 326 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:00,356 INFO L93 Difference]: Finished difference Result 251 states and 572 transitions. [2021-03-10 21:14:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:00,356 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:00,357 INFO L225 Difference]: With dead ends: 251 [2021-03-10 21:14:00,357 INFO L226 Difference]: Without dead ends: 246 [2021-03-10 21:14:00,357 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-03-10 21:14:00,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2021-03-10 21:14:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.5310344827586206) internal successors, (367), 145 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 367 transitions. [2021-03-10 21:14:00,362 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 367 transitions. Word has length 15 [2021-03-10 21:14:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:00,362 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 367 transitions. [2021-03-10 21:14:00,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 367 transitions. [2021-03-10 21:14:00,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:00,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:00,362 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:00,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 21:14:00,571 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:00,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:00,571 INFO L82 PathProgramCache]: Analyzing trace with hash -161599013, now seen corresponding path program 35 times [2021-03-10 21:14:00,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:00,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550807647] [2021-03-10 21:14:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:00,573 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:00,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532386641] [2021-03-10 21:14:00,574 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:00,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:00,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:00,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:14:00,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:00,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550807647] [2021-03-10 21:14:00,681 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:00,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532386641] [2021-03-10 21:14:00,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:00,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:00,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133917293] [2021-03-10 21:14:00,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:00,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:00,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:00,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:00,683 INFO L87 Difference]: Start difference. First operand 146 states and 367 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:00,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:00,790 INFO L93 Difference]: Finished difference Result 263 states and 600 transitions. [2021-03-10 21:14:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:00,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:00,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:00,791 INFO L225 Difference]: With dead ends: 263 [2021-03-10 21:14:00,792 INFO L226 Difference]: Without dead ends: 259 [2021-03-10 21:14:00,792 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-03-10 21:14:00,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 145. [2021-03-10 21:14:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.5277777777777777) internal successors, (364), 144 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:00,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 364 transitions. [2021-03-10 21:14:00,796 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 364 transitions. Word has length 15 [2021-03-10 21:14:00,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:00,796 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 364 transitions. [2021-03-10 21:14:00,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:00,796 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 364 transitions. [2021-03-10 21:14:00,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:00,796 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:00,796 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:01,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 21:14:01,017 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:01,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:01,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1190403433, now seen corresponding path program 36 times [2021-03-10 21:14:01,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:01,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924763317] [2021-03-10 21:14:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:01,021 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:01,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965733059] [2021-03-10 21:14:01,021 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 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 21:14:01,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:01,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:01,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:14:01,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:01,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924763317] [2021-03-10 21:14:01,105 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:01,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965733059] [2021-03-10 21:14:01,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:01,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-03-10 21:14:01,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151873175] [2021-03-10 21:14:01,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:14:01,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:01,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:14:01,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:14:01,105 INFO L87 Difference]: Start difference. First operand 145 states and 364 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:01,183 INFO L93 Difference]: Finished difference Result 229 states and 547 transitions. [2021-03-10 21:14:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:01,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2021-03-10 21:14:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:01,185 INFO L225 Difference]: With dead ends: 229 [2021-03-10 21:14:01,185 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 21:14:01,185 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 21:14:01,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2021-03-10 21:14:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.567741935483871) internal successors, (398), 155 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 21:14:01,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 398 transitions. [2021-03-10 21:14:01,189 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 398 transitions. Word has length 15 [2021-03-10 21:14:01,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:01,189 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 398 transitions. [2021-03-10 21:14:01,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:01,189 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 398 transitions. [2021-03-10 21:14:01,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:01,190 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:01,190 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:01,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 21:14:01,414 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:01,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:01,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1308487913, now seen corresponding path program 37 times [2021-03-10 21:14:01,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:01,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582974420] [2021-03-10 21:14:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:01,416 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:01,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8988030] [2021-03-10 21:14:01,416 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 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 21:14:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:01,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:01,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582974420] [2021-03-10 21:14:01,538 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:01,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8988030] [2021-03-10 21:14:01,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:01,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:01,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334622518] [2021-03-10 21:14:01,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:01,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:01,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:01,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:01,539 INFO L87 Difference]: Start difference. First operand 156 states and 398 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:01,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:01,668 INFO L93 Difference]: Finished difference Result 226 states and 546 transitions. [2021-03-10 21:14:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:01,669 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:01,670 INFO L225 Difference]: With dead ends: 226 [2021-03-10 21:14:01,670 INFO L226 Difference]: Without dead ends: 221 [2021-03-10 21:14:01,670 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:01,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-03-10 21:14:01,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 159. [2021-03-10 21:14:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.5822784810126582) internal successors, (408), 158 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 21:14:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 408 transitions. [2021-03-10 21:14:01,673 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 408 transitions. Word has length 15 [2021-03-10 21:14:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:01,674 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 408 transitions. [2021-03-10 21:14:01,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:01,674 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 408 transitions. [2021-03-10 21:14:01,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:01,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:01,674 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:01,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 21:14:01,888 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash 409855793, now seen corresponding path program 38 times [2021-03-10 21:14:01,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:01,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779595304] [2021-03-10 21:14:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:01,895 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:01,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475591363] [2021-03-10 21:14:01,895 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 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 21:14:01,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:01,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:01,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:14:01,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:02,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779595304] [2021-03-10 21:14:02,016 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:02,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475591363] [2021-03-10 21:14:02,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:02,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:02,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209687293] [2021-03-10 21:14:02,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:02,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:02,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:02,017 INFO L87 Difference]: Start difference. First operand 159 states and 408 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:02,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:02,153 INFO L93 Difference]: Finished difference Result 247 states and 589 transitions. [2021-03-10 21:14:02,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:02,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:02,155 INFO L225 Difference]: With dead ends: 247 [2021-03-10 21:14:02,155 INFO L226 Difference]: Without dead ends: 243 [2021-03-10 21:14:02,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:02,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-03-10 21:14:02,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 159. [2021-03-10 21:14:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.588607594936709) internal successors, (409), 158 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 409 transitions. [2021-03-10 21:14:02,159 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 409 transitions. Word has length 15 [2021-03-10 21:14:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:02,159 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 409 transitions. [2021-03-10 21:14:02,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:02,159 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 409 transitions. [2021-03-10 21:14:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:02,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:02,160 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:02,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:02,375 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:02,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:02,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2141071811, now seen corresponding path program 39 times [2021-03-10 21:14:02,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:02,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235346832] [2021-03-10 21:14:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:02,377 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:02,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101306506] [2021-03-10 21:14:02,377 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:02,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:02,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:02,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:02,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:02,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235346832] [2021-03-10 21:14:02,502 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:02,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101306506] [2021-03-10 21:14:02,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:02,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:02,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206095769] [2021-03-10 21:14:02,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:02,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:02,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:02,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:02,503 INFO L87 Difference]: Start difference. First operand 159 states and 409 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:02,601 INFO L93 Difference]: Finished difference Result 181 states and 450 transitions. [2021-03-10 21:14:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:02,601 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:02,602 INFO L225 Difference]: With dead ends: 181 [2021-03-10 21:14:02,602 INFO L226 Difference]: Without dead ends: 178 [2021-03-10 21:14:02,602 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:02,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-03-10 21:14:02,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 159. [2021-03-10 21:14:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.588607594936709) internal successors, (409), 158 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:02,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 409 transitions. [2021-03-10 21:14:02,606 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 409 transitions. Word has length 15 [2021-03-10 21:14:02,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:02,606 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 409 transitions. [2021-03-10 21:14:02,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:02,606 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 409 transitions. [2021-03-10 21:14:02,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:02,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:02,606 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:02,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:02,827 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:02,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:02,827 INFO L82 PathProgramCache]: Analyzing trace with hash 428289819, now seen corresponding path program 40 times [2021-03-10 21:14:02,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:02,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281299762] [2021-03-10 21:14:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:02,830 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:02,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010660700] [2021-03-10 21:14:02,830 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:02,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:02,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:02,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:02,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:02,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281299762] [2021-03-10 21:14:02,947 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:02,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010660700] [2021-03-10 21:14:02,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:02,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:02,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10355515] [2021-03-10 21:14:02,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:02,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:02,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:02,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:02,950 INFO L87 Difference]: Start difference. First operand 159 states and 409 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:03,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:03,067 INFO L93 Difference]: Finished difference Result 212 states and 527 transitions. [2021-03-10 21:14:03,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:03,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:03,068 INFO L225 Difference]: With dead ends: 212 [2021-03-10 21:14:03,068 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 21:14:03,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:03,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 21:14:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 159. [2021-03-10 21:14:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.588607594936709) internal successors, (409), 158 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 409 transitions. [2021-03-10 21:14:03,071 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 409 transitions. Word has length 15 [2021-03-10 21:14:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:03,072 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 409 transitions. [2021-03-10 21:14:03,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 409 transitions. [2021-03-10 21:14:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:03,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:03,072 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:03,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:03,287 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:03,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:03,287 INFO L82 PathProgramCache]: Analyzing trace with hash 955767327, now seen corresponding path program 41 times [2021-03-10 21:14:03,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:03,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121419236] [2021-03-10 21:14:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:03,290 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:03,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708883740] [2021-03-10 21:14:03,291 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 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 21:14:03,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:03,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:03,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:14:03,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:03,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121419236] [2021-03-10 21:14:03,377 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:03,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708883740] [2021-03-10 21:14:03,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:03,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-03-10 21:14:03,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632570710] [2021-03-10 21:14:03,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:14:03,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:03,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:14:03,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:14:03,378 INFO L87 Difference]: Start difference. First operand 159 states and 409 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:03,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:03,478 INFO L93 Difference]: Finished difference Result 267 states and 630 transitions. [2021-03-10 21:14:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:03,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2021-03-10 21:14:03,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:03,479 INFO L225 Difference]: With dead ends: 267 [2021-03-10 21:14:03,479 INFO L226 Difference]: Without dead ends: 248 [2021-03-10 21:14:03,479 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:03,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-03-10 21:14:03,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 166. [2021-03-10 21:14:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.618181818181818) internal successors, (432), 165 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 432 transitions. [2021-03-10 21:14:03,487 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 432 transitions. Word has length 15 [2021-03-10 21:14:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:03,487 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 432 transitions. [2021-03-10 21:14:03,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:03,487 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 432 transitions. [2021-03-10 21:14:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:03,501 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:03,501 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:03,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-03-10 21:14:03,721 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash 837682847, now seen corresponding path program 42 times [2021-03-10 21:14:03,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:03,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20794728] [2021-03-10 21:14:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:03,723 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:03,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555536840] [2021-03-10 21:14:03,724 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 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 21:14:03,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:03,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:03,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:14:03,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:03,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:03,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:03,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:03,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:03,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:14:03,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:03,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:03,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:03,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:03,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-03-10 21:14:03,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:14:03,847 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:14:03,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:03,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:03,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:03,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:03,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:03,860 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:16 [2021-03-10 21:14:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:03,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20794728] [2021-03-10 21:14:03,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:03,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555536840] [2021-03-10 21:14:03,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:03,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:03,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793794000] [2021-03-10 21:14:03,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:03,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:03,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:03,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:03,880 INFO L87 Difference]: Start difference. First operand 166 states and 432 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:04,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:04,011 INFO L93 Difference]: Finished difference Result 187 states and 469 transitions. [2021-03-10 21:14:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:04,012 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:04,012 INFO L225 Difference]: With dead ends: 187 [2021-03-10 21:14:04,012 INFO L226 Difference]: Without dead ends: 184 [2021-03-10 21:14:04,013 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:04,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-03-10 21:14:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 166. [2021-03-10 21:14:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.618181818181818) internal successors, (432), 165 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 432 transitions. [2021-03-10 21:14:04,017 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 432 transitions. Word has length 15 [2021-03-10 21:14:04,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:04,017 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 432 transitions. [2021-03-10 21:14:04,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:04,017 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 432 transitions. [2021-03-10 21:14:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:04,018 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:04,018 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:04,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 21:14:04,239 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:04,239 INFO L82 PathProgramCache]: Analyzing trace with hash 5098949, now seen corresponding path program 43 times [2021-03-10 21:14:04,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:04,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115577456] [2021-03-10 21:14:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:04,242 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:04,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222115267] [2021-03-10 21:14:04,242 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 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 21:14:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:04,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:04,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:04,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115577456] [2021-03-10 21:14:04,353 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:04,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222115267] [2021-03-10 21:14:04,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:04,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:04,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136141100] [2021-03-10 21:14:04,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:04,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:04,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:04,353 INFO L87 Difference]: Start difference. First operand 166 states and 432 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:04,484 INFO L93 Difference]: Finished difference Result 192 states and 481 transitions. [2021-03-10 21:14:04,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:04,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:04,485 INFO L225 Difference]: With dead ends: 192 [2021-03-10 21:14:04,485 INFO L226 Difference]: Without dead ends: 189 [2021-03-10 21:14:04,485 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:04,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-03-10 21:14:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 166. [2021-03-10 21:14:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.618181818181818) internal successors, (432), 165 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 432 transitions. [2021-03-10 21:14:04,488 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 432 transitions. Word has length 15 [2021-03-10 21:14:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:04,488 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 432 transitions. [2021-03-10 21:14:04,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 432 transitions. [2021-03-10 21:14:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:04,489 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:04,489 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:04,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 21:14:04,699 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:04,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1720506717, now seen corresponding path program 44 times [2021-03-10 21:14:04,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:04,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108023776] [2021-03-10 21:14:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:04,702 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:04,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298466649] [2021-03-10 21:14:04,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:04,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:04,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:04,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:14:04,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:04,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108023776] [2021-03-10 21:14:04,806 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:04,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298466649] [2021-03-10 21:14:04,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:04,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:04,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266245675] [2021-03-10 21:14:04,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:04,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:04,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:04,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:04,807 INFO L87 Difference]: Start difference. First operand 166 states and 432 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:04,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:04,920 INFO L93 Difference]: Finished difference Result 225 states and 564 transitions. [2021-03-10 21:14:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:04,921 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:04,921 INFO L225 Difference]: With dead ends: 225 [2021-03-10 21:14:04,922 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:14:04,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:14:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 163. [2021-03-10 21:14:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.5987654320987654) internal successors, (421), 162 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 421 transitions. [2021-03-10 21:14:04,925 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 421 transitions. Word has length 15 [2021-03-10 21:14:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:04,925 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 421 transitions. [2021-03-10 21:14:04,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:04,925 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 421 transitions. [2021-03-10 21:14:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:04,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:04,926 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:05,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:05,139 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:05,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:05,139 INFO L82 PathProgramCache]: Analyzing trace with hash 576553755, now seen corresponding path program 45 times [2021-03-10 21:14:05,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:05,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757664152] [2021-03-10 21:14:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:05,142 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:05,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841392040] [2021-03-10 21:14:05,142 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:05,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:05,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:05,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:14:05,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:05,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:05,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:05,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:05,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:05,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:14:05,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:05,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:05,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:05,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:05,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-03-10 21:14:05,257 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-03-10 21:14:05,258 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 27 [2021-03-10 21:14:05,260 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:14:05,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:05,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:14:05,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-03-10 21:14:05,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:05,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:05,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:05,279 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:45, output treesize:16 [2021-03-10 21:14:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:05,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757664152] [2021-03-10 21:14:05,330 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:05,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841392040] [2021-03-10 21:14:05,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:05,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:05,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086727056] [2021-03-10 21:14:05,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:05,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:05,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:05,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:05,331 INFO L87 Difference]: Start difference. First operand 163 states and 421 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:05,450 INFO L93 Difference]: Finished difference Result 180 states and 449 transitions. [2021-03-10 21:14:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:05,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:05,452 INFO L225 Difference]: With dead ends: 180 [2021-03-10 21:14:05,452 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 21:14:05,452 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:05,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 21:14:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 165. [2021-03-10 21:14:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.5853658536585367) internal successors, (424), 164 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 424 transitions. [2021-03-10 21:14:05,456 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 424 transitions. Word has length 15 [2021-03-10 21:14:05,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:05,456 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 424 transitions. [2021-03-10 21:14:05,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 424 transitions. [2021-03-10 21:14:05,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:05,457 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:05,457 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:05,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 21:14:05,663 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:05,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:05,664 INFO L82 PathProgramCache]: Analyzing trace with hash -256408741, now seen corresponding path program 46 times [2021-03-10 21:14:05,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:05,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920986316] [2021-03-10 21:14:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:05,675 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:05,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848812878] [2021-03-10 21:14:05,675 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:05,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:05,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:05,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:05,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920986316] [2021-03-10 21:14:05,811 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:05,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848812878] [2021-03-10 21:14:05,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:05,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:05,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574731656] [2021-03-10 21:14:05,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:05,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:05,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:05,812 INFO L87 Difference]: Start difference. First operand 165 states and 424 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:05,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:05,933 INFO L93 Difference]: Finished difference Result 242 states and 582 transitions. [2021-03-10 21:14:05,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:05,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:05,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:05,934 INFO L225 Difference]: With dead ends: 242 [2021-03-10 21:14:05,934 INFO L226 Difference]: Without dead ends: 237 [2021-03-10 21:14:05,934 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-03-10 21:14:05,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2021-03-10 21:14:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.5527950310559007) internal successors, (411), 161 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2021-03-10 21:14:05,937 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 15 [2021-03-10 21:14:05,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:05,938 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2021-03-10 21:14:05,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2021-03-10 21:14:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:05,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:05,938 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:06,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 21:14:06,151 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:06,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:06,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1461934965, now seen corresponding path program 47 times [2021-03-10 21:14:06,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:06,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690904923] [2021-03-10 21:14:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:06,154 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:06,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782285702] [2021-03-10 21:14:06,155 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:06,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:06,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:06,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:06,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:06,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690904923] [2021-03-10 21:14:06,254 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:06,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782285702] [2021-03-10 21:14:06,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:06,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:06,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712873103] [2021-03-10 21:14:06,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:06,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:06,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:06,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:06,255 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:06,361 INFO L93 Difference]: Finished difference Result 241 states and 583 transitions. [2021-03-10 21:14:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:06,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:06,362 INFO L225 Difference]: With dead ends: 241 [2021-03-10 21:14:06,362 INFO L226 Difference]: Without dead ends: 237 [2021-03-10 21:14:06,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-03-10 21:14:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 152. [2021-03-10 21:14:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.5165562913907285) internal successors, (380), 151 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:06,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 380 transitions. [2021-03-10 21:14:06,364 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 380 transitions. Word has length 15 [2021-03-10 21:14:06,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:06,365 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 380 transitions. [2021-03-10 21:14:06,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:06,365 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 380 transitions. [2021-03-10 21:14:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:06,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:06,365 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:06,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 21:14:06,566 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:06,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:06,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1139091843, now seen corresponding path program 48 times [2021-03-10 21:14:06,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:06,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293339310] [2021-03-10 21:14:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:06,568 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:06,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001511831] [2021-03-10 21:14:06,568 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 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 21:14:06,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:06,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:14:06,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:06,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293339310] [2021-03-10 21:14:06,651 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:06,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001511831] [2021-03-10 21:14:06,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:06,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-03-10 21:14:06,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107616061] [2021-03-10 21:14:06,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:14:06,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:06,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:14:06,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:14:06,652 INFO L87 Difference]: Start difference. First operand 152 states and 380 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:06,775 INFO L93 Difference]: Finished difference Result 252 states and 620 transitions. [2021-03-10 21:14:06,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:06,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2021-03-10 21:14:06,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:06,777 INFO L225 Difference]: With dead ends: 252 [2021-03-10 21:14:06,777 INFO L226 Difference]: Without dead ends: 235 [2021-03-10 21:14:06,777 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:06,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-03-10 21:14:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2021-03-10 21:14:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.509433962264151) internal successors, (399), 159 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 399 transitions. [2021-03-10 21:14:06,781 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 399 transitions. Word has length 15 [2021-03-10 21:14:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:06,781 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 399 transitions. [2021-03-10 21:14:06,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 399 transitions. [2021-03-10 21:14:06,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:06,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:06,781 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:06,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-03-10 21:14:06,999 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:06,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:06,999 INFO L82 PathProgramCache]: Analyzing trace with hash 206681367, now seen corresponding path program 49 times [2021-03-10 21:14:06,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:07,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672409135] [2021-03-10 21:14:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:07,001 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:07,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077152409] [2021-03-10 21:14:07,001 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 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 21:14:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:07,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:07,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:07,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672409135] [2021-03-10 21:14:07,116 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:07,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077152409] [2021-03-10 21:14:07,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:07,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:07,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90857158] [2021-03-10 21:14:07,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:07,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:07,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:07,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:07,117 INFO L87 Difference]: Start difference. First operand 160 states and 399 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:07,237 INFO L93 Difference]: Finished difference Result 276 states and 675 transitions. [2021-03-10 21:14:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:07,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:07,238 INFO L225 Difference]: With dead ends: 276 [2021-03-10 21:14:07,238 INFO L226 Difference]: Without dead ends: 270 [2021-03-10 21:14:07,238 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:07,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-03-10 21:14:07,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 160. [2021-03-10 21:14:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.50314465408805) internal successors, (398), 159 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 21:14:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 398 transitions. [2021-03-10 21:14:07,242 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 398 transitions. Word has length 15 [2021-03-10 21:14:07,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:07,242 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 398 transitions. [2021-03-10 21:14:07,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:07,242 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 398 transitions. [2021-03-10 21:14:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:07,243 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:07,243 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:07,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:07,459 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:07,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:07,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1180648133, now seen corresponding path program 50 times [2021-03-10 21:14:07,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:07,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145377686] [2021-03-10 21:14:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:07,462 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:07,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794503537] [2021-03-10 21:14:07,462 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 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 21:14:07,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:07,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:07,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:14:07,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:07,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145377686] [2021-03-10 21:14:07,541 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:07,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794503537] [2021-03-10 21:14:07,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:07,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-03-10 21:14:07,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549806433] [2021-03-10 21:14:07,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:14:07,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:07,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:14:07,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:14:07,541 INFO L87 Difference]: Start difference. First operand 160 states and 398 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:07,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:07,651 INFO L93 Difference]: Finished difference Result 217 states and 536 transitions. [2021-03-10 21:14:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:07,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2021-03-10 21:14:07,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:07,652 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:14:07,652 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 21:14:07,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 21:14:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 161. [2021-03-10 21:14:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.50625) internal successors, (401), 160 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:07,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 401 transitions. [2021-03-10 21:14:07,656 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 401 transitions. Word has length 15 [2021-03-10 21:14:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:07,656 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 401 transitions. [2021-03-10 21:14:07,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:07,656 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 401 transitions. [2021-03-10 21:14:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:07,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:07,657 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:07,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 21:14:07,871 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:07,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1814996549, now seen corresponding path program 51 times [2021-03-10 21:14:07,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:07,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336994580] [2021-03-10 21:14:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:07,873 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:07,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675964098] [2021-03-10 21:14:07,873 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 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 21:14:07,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:07,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:07,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:14:07,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:07,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336994580] [2021-03-10 21:14:07,976 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:07,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675964098] [2021-03-10 21:14:07,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:07,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:07,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384165060] [2021-03-10 21:14:07,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:07,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:07,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:07,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:07,977 INFO L87 Difference]: Start difference. First operand 161 states and 401 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:08,089 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2021-03-10 21:14:08,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:08,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:08,090 INFO L225 Difference]: With dead ends: 254 [2021-03-10 21:14:08,090 INFO L226 Difference]: Without dead ends: 248 [2021-03-10 21:14:08,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-03-10 21:14:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 169. [2021-03-10 21:14:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5238095238095237) internal successors, (424), 168 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2021-03-10 21:14:08,093 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 15 [2021-03-10 21:14:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:08,093 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2021-03-10 21:14:08,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:08,093 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2021-03-10 21:14:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:08,094 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:08,094 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:08,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-03-10 21:14:08,307 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash -750923413, now seen corresponding path program 52 times [2021-03-10 21:14:08,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:08,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235341316] [2021-03-10 21:14:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:08,309 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:08,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193228907] [2021-03-10 21:14:08,309 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 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 21:14:08,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:08,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:08,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:08,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:08,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235341316] [2021-03-10 21:14:08,419 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:08,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193228907] [2021-03-10 21:14:08,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:08,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:08,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079630414] [2021-03-10 21:14:08,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:08,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:08,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:08,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:08,420 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:08,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:08,511 INFO L93 Difference]: Finished difference Result 273 states and 657 transitions. [2021-03-10 21:14:08,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:08,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:08,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:08,513 INFO L225 Difference]: With dead ends: 273 [2021-03-10 21:14:08,513 INFO L226 Difference]: Without dead ends: 268 [2021-03-10 21:14:08,513 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-03-10 21:14:08,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 174. [2021-03-10 21:14:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.5491329479768785) internal successors, (441), 173 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 441 transitions. [2021-03-10 21:14:08,516 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 441 transitions. Word has length 15 [2021-03-10 21:14:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:08,516 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 441 transitions. [2021-03-10 21:14:08,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 441 transitions. [2021-03-10 21:14:08,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:08,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:08,516 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:08,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:08,717 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:08,717 INFO L82 PathProgramCache]: Analyzing trace with hash 967420293, now seen corresponding path program 53 times [2021-03-10 21:14:08,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:08,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857832600] [2021-03-10 21:14:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:08,718 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:08,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750153050] [2021-03-10 21:14:08,719 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 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 21:14:08,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:08,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:08,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:14:08,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:08,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:08,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:08,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:08,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:08,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:14:08,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:08,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:08,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:08,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:08,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:30 [2021-03-10 21:14:08,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:08,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:08,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:08,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:14:08,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:08,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:08,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:08,843 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:16 [2021-03-10 21:14:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:08,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857832600] [2021-03-10 21:14:08,873 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:08,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750153050] [2021-03-10 21:14:08,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:08,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:08,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106290334] [2021-03-10 21:14:08,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:08,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:08,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:08,874 INFO L87 Difference]: Start difference. First operand 174 states and 441 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:08,979 INFO L93 Difference]: Finished difference Result 236 states and 592 transitions. [2021-03-10 21:14:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:08,979 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:08,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:08,980 INFO L225 Difference]: With dead ends: 236 [2021-03-10 21:14:08,980 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:14:08,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:08,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:14:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 175. [2021-03-10 21:14:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5517241379310347) internal successors, (444), 174 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 444 transitions. [2021-03-10 21:14:08,984 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 444 transitions. Word has length 15 [2021-03-10 21:14:08,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:08,985 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 444 transitions. [2021-03-10 21:14:08,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:08,985 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 444 transitions. [2021-03-10 21:14:08,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:08,985 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:08,985 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:09,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-10 21:14:09,203 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:09,203 INFO L82 PathProgramCache]: Analyzing trace with hash -61384127, now seen corresponding path program 54 times [2021-03-10 21:14:09,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:09,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574530401] [2021-03-10 21:14:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:09,205 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:09,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31950787] [2021-03-10 21:14:09,205 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 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 21:14:09,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:09,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:09,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:14:09,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:09,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:09,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:09,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:09,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:09,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:14:09,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:09,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-03-10 21:14:09,290 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:14:09,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:09,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:14:09,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:09,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:09,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:14:09,319 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:29 [2021-03-10 21:14:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:09,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574530401] [2021-03-10 21:14:09,475 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:09,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31950787] [2021-03-10 21:14:09,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:09,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-03-10 21:14:09,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429091109] [2021-03-10 21:14:09,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:14:09,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:09,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:14:09,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:14:09,476 INFO L87 Difference]: Start difference. First operand 175 states and 444 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:09,838 INFO L93 Difference]: Finished difference Result 245 states and 601 transitions. [2021-03-10 21:14:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:09,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2021-03-10 21:14:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:09,840 INFO L225 Difference]: With dead ends: 245 [2021-03-10 21:14:09,840 INFO L226 Difference]: Without dead ends: 242 [2021-03-10 21:14:09,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 305.6ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:09,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-03-10 21:14:09,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 180. [2021-03-10 21:14:09,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.5865921787709496) internal successors, (463), 179 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 463 transitions. [2021-03-10 21:14:09,844 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 463 transitions. Word has length 15 [2021-03-10 21:14:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:09,844 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 463 transitions. [2021-03-10 21:14:09,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:09,844 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 463 transitions. [2021-03-10 21:14:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:09,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:09,845 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:10,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:10,045 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:10,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:10,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1030486531, now seen corresponding path program 55 times [2021-03-10 21:14:10,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:10,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580572091] [2021-03-10 21:14:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:10,048 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:10,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130061870] [2021-03-10 21:14:10,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:10,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:10,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:10,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580572091] [2021-03-10 21:14:10,181 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:10,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130061870] [2021-03-10 21:14:10,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:10,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:10,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010030522] [2021-03-10 21:14:10,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:10,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:10,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:10,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:10,182 INFO L87 Difference]: Start difference. First operand 180 states and 463 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:10,316 INFO L93 Difference]: Finished difference Result 216 states and 546 transitions. [2021-03-10 21:14:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:10,316 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:10,317 INFO L225 Difference]: With dead ends: 216 [2021-03-10 21:14:10,317 INFO L226 Difference]: Without dead ends: 213 [2021-03-10 21:14:10,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-03-10 21:14:10,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 181. [2021-03-10 21:14:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.5944444444444446) internal successors, (467), 180 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 467 transitions. [2021-03-10 21:14:10,321 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 467 transitions. Word has length 15 [2021-03-10 21:14:10,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:10,321 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 467 transitions. [2021-03-10 21:14:10,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 467 transitions. [2021-03-10 21:14:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:10,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:10,321 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:10,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-10 21:14:10,535 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:10,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:10,535 INFO L82 PathProgramCache]: Analyzing trace with hash -179468607, now seen corresponding path program 56 times [2021-03-10 21:14:10,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:10,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943343636] [2021-03-10 21:14:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:10,537 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:10,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587973349] [2021-03-10 21:14:10,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:10,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:10,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:10,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:14:10,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:10,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:14:10,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:10,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:10,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:14:10,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:25 [2021-03-10 21:14:10,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:10,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:10,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:10,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:14:10,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:35 [2021-03-10 21:14:10,721 INFO L446 ElimStorePlain]: Different costs {0=[v_A_43], 2=[F]} [2021-03-10 21:14:10,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:10,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:10,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:10,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:14:10,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:10,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-03-10 21:14:10,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:14:10,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:10,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:14:10,762 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:26 [2021-03-10 21:14:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:10,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943343636] [2021-03-10 21:14:10,877 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:10,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587973349] [2021-03-10 21:14:10,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:10,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:10,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585045218] [2021-03-10 21:14:10,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:10,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:10,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:10,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:10,878 INFO L87 Difference]: Start difference. First operand 181 states and 467 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:10,999 INFO L93 Difference]: Finished difference Result 224 states and 562 transitions. [2021-03-10 21:14:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:11,000 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:11,001 INFO L225 Difference]: With dead ends: 224 [2021-03-10 21:14:11,001 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:14:11,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:14:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 181. [2021-03-10 21:14:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.588888888888889) internal successors, (466), 180 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 466 transitions. [2021-03-10 21:14:11,004 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 466 transitions. Word has length 15 [2021-03-10 21:14:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:11,005 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 466 transitions. [2021-03-10 21:14:11,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 466 transitions. [2021-03-10 21:14:11,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:11,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:11,005 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:11,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:11,219 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:11,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1538875099, now seen corresponding path program 57 times [2021-03-10 21:14:11,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:11,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785293307] [2021-03-10 21:14:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:11,221 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:11,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571120063] [2021-03-10 21:14:11,221 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 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 21:14:11,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:11,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:11,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:14:11,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:11,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785293307] [2021-03-10 21:14:11,331 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:11,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571120063] [2021-03-10 21:14:11,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:11,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:11,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586698749] [2021-03-10 21:14:11,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:11,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:11,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:11,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:11,332 INFO L87 Difference]: Start difference. First operand 181 states and 466 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:11,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:11,455 INFO L93 Difference]: Finished difference Result 267 states and 649 transitions. [2021-03-10 21:14:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:11,456 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:11,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:11,457 INFO L225 Difference]: With dead ends: 267 [2021-03-10 21:14:11,457 INFO L226 Difference]: Without dead ends: 262 [2021-03-10 21:14:11,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-03-10 21:14:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 181. [2021-03-10 21:14:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.5944444444444446) internal successors, (467), 180 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:11,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 467 transitions. [2021-03-10 21:14:11,460 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 467 transitions. Word has length 15 [2021-03-10 21:14:11,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:11,461 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 467 transitions. [2021-03-10 21:14:11,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 467 transitions. [2021-03-10 21:14:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:11,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:11,461 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:11,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:11,682 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:11,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:11,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1012052505, now seen corresponding path program 58 times [2021-03-10 21:14:11,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:11,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488108452] [2021-03-10 21:14:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:11,684 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:11,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384174799] [2021-03-10 21:14:11,685 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:11,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:11,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:11,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:11,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:11,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488108452] [2021-03-10 21:14:11,818 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:11,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384174799] [2021-03-10 21:14:11,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:11,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:11,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959711970] [2021-03-10 21:14:11,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:11,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:11,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:11,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:11,819 INFO L87 Difference]: Start difference. First operand 181 states and 467 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:11,942 INFO L93 Difference]: Finished difference Result 218 states and 548 transitions. [2021-03-10 21:14:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:11,943 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:11,943 INFO L225 Difference]: With dead ends: 218 [2021-03-10 21:14:11,943 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 21:14:11,943 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 21:14:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 181. [2021-03-10 21:14:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.5944444444444446) internal successors, (467), 180 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 467 transitions. [2021-03-10 21:14:11,947 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 467 transitions. Word has length 15 [2021-03-10 21:14:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:11,947 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 467 transitions. [2021-03-10 21:14:11,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 467 transitions. [2021-03-10 21:14:11,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:11,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:11,948 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:12,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:12,163 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:12,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:12,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2101626631, now seen corresponding path program 59 times [2021-03-10 21:14:12,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:12,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469369265] [2021-03-10 21:14:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:12,165 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:12,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200269887] [2021-03-10 21:14:12,165 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 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 21:14:12,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:12,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:12,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:14:12,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:12,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469369265] [2021-03-10 21:14:12,285 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:12,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200269887] [2021-03-10 21:14:12,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:12,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:12,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024215547] [2021-03-10 21:14:12,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:12,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:12,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:12,286 INFO L87 Difference]: Start difference. First operand 181 states and 467 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:12,415 INFO L93 Difference]: Finished difference Result 213 states and 538 transitions. [2021-03-10 21:14:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:12,415 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:12,416 INFO L225 Difference]: With dead ends: 213 [2021-03-10 21:14:12,416 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 21:14:12,416 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 21:14:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 182. [2021-03-10 21:14:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.596685082872928) internal successors, (470), 181 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 470 transitions. [2021-03-10 21:14:12,421 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 470 transitions. Word has length 15 [2021-03-10 21:14:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:12,421 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 470 transitions. [2021-03-10 21:14:12,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 470 transitions. [2021-03-10 21:14:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:12,422 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:12,422 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:12,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:12,635 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:12,635 INFO L82 PathProgramCache]: Analyzing trace with hash -383282925, now seen corresponding path program 60 times [2021-03-10 21:14:12,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:12,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493097119] [2021-03-10 21:14:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:12,637 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:12,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523578319] [2021-03-10 21:14:12,638 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 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 21:14:12,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:12,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:12,657 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:12,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:12,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:12,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:12,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:12,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:12,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:14:12,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:12,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:12,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:12,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:12,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:12,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:12,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:12,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:12,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-03-10 21:14:12,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:12,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:12,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:12,794 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-03-10 21:14:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:12,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493097119] [2021-03-10 21:14:12,838 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:12,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523578319] [2021-03-10 21:14:12,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:12,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:12,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400854982] [2021-03-10 21:14:12,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:12,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:12,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:12,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:12,839 INFO L87 Difference]: Start difference. First operand 182 states and 470 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:12,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:12,981 INFO L93 Difference]: Finished difference Result 226 states and 563 transitions. [2021-03-10 21:14:12,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:12,981 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:12,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:12,982 INFO L225 Difference]: With dead ends: 226 [2021-03-10 21:14:12,982 INFO L226 Difference]: Without dead ends: 223 [2021-03-10 21:14:12,982 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-03-10 21:14:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 185. [2021-03-10 21:14:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.608695652173913) internal successors, (480), 184 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 480 transitions. [2021-03-10 21:14:12,985 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 480 transitions. Word has length 15 [2021-03-10 21:14:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:12,985 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 480 transitions. [2021-03-10 21:14:12,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 480 transitions. [2021-03-10 21:14:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:12,986 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:12,986 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:13,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:13,199 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:13,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:13,199 INFO L82 PathProgramCache]: Analyzing trace with hash -494105445, now seen corresponding path program 61 times [2021-03-10 21:14:13,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:13,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619755051] [2021-03-10 21:14:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:13,202 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:13,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182640058] [2021-03-10 21:14:13,202 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 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 21:14:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:13,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:13,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:13,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619755051] [2021-03-10 21:14:13,322 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:13,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182640058] [2021-03-10 21:14:13,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:13,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:13,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618050220] [2021-03-10 21:14:13,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:13,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:13,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:13,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:13,323 INFO L87 Difference]: Start difference. First operand 185 states and 480 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:13,468 INFO L93 Difference]: Finished difference Result 250 states and 632 transitions. [2021-03-10 21:14:13,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:13,468 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:13,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:13,469 INFO L225 Difference]: With dead ends: 250 [2021-03-10 21:14:13,469 INFO L226 Difference]: Without dead ends: 244 [2021-03-10 21:14:13,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-03-10 21:14:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 181. [2021-03-10 21:14:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.588888888888889) internal successors, (466), 180 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:13,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 466 transitions. [2021-03-10 21:14:13,472 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 466 transitions. Word has length 15 [2021-03-10 21:14:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:13,473 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 466 transitions. [2021-03-10 21:14:13,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 466 transitions. [2021-03-10 21:14:13,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:13,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:13,473 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:13,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:13,675 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:13,676 INFO L82 PathProgramCache]: Analyzing trace with hash 261769119, now seen corresponding path program 62 times [2021-03-10 21:14:13,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:13,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828800834] [2021-03-10 21:14:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:13,677 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:13,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201436294] [2021-03-10 21:14:13,677 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 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 21:14:13,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:13,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:14:13,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:13,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-03-10 21:14:13,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:13,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:13,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:14:13,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2021-03-10 21:14:13,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:13,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:13,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:13,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:14:13,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:31 [2021-03-10 21:14:13,835 INFO L446 ElimStorePlain]: Different costs {0=[v_A_46], 2=[F]} [2021-03-10 21:14:13,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:13,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:13,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:13,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:14:13,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:13,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-03-10 21:14:13,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-03-10 21:14:13,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:13,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:14:13,869 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:26 [2021-03-10 21:14:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:13,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828800834] [2021-03-10 21:14:13,989 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:13,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201436294] [2021-03-10 21:14:13,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:13,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:13,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097598201] [2021-03-10 21:14:13,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:13,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:13,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:13,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:13,990 INFO L87 Difference]: Start difference. First operand 181 states and 466 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:14,138 INFO L93 Difference]: Finished difference Result 224 states and 562 transitions. [2021-03-10 21:14:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:14,138 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:14,139 INFO L225 Difference]: With dead ends: 224 [2021-03-10 21:14:14,139 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:14:14,139 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:14:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 181. [2021-03-10 21:14:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.5833333333333335) internal successors, (465), 180 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 465 transitions. [2021-03-10 21:14:14,142 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 465 transitions. Word has length 15 [2021-03-10 21:14:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:14,142 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 465 transitions. [2021-03-10 21:14:14,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 465 transitions. [2021-03-10 21:14:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:14,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:14,143 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:14,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-03-10 21:14:14,355 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:14,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1980112825, now seen corresponding path program 63 times [2021-03-10 21:14:14,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:14,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621378534] [2021-03-10 21:14:14,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:14,357 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:14,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816249858] [2021-03-10 21:14:14,357 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 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 21:14:14,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:14,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:14,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:14:14,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:14,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621378534] [2021-03-10 21:14:14,468 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:14,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816249858] [2021-03-10 21:14:14,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:14,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:14,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36891653] [2021-03-10 21:14:14,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:14,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:14,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:14,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:14,469 INFO L87 Difference]: Start difference. First operand 181 states and 465 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:14,615 INFO L93 Difference]: Finished difference Result 289 states and 694 transitions. [2021-03-10 21:14:14,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:14,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:14,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:14,616 INFO L225 Difference]: With dead ends: 289 [2021-03-10 21:14:14,616 INFO L226 Difference]: Without dead ends: 284 [2021-03-10 21:14:14,616 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:14,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-03-10 21:14:14,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 178. [2021-03-10 21:14:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.5762711864406778) internal successors, (456), 177 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2021-03-10 21:14:14,619 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2021-03-10 21:14:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:14,620 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2021-03-10 21:14:14,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2021-03-10 21:14:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:14,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:14,620 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:14,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:14,837 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:14,838 INFO L82 PathProgramCache]: Analyzing trace with hash -17793999, now seen corresponding path program 64 times [2021-03-10 21:14:14,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:14,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409433455] [2021-03-10 21:14:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:14,839 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:14,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030508738] [2021-03-10 21:14:14,839 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 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 21:14:14,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:14,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:14,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:14,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:14,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409433455] [2021-03-10 21:14:14,974 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:14,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030508738] [2021-03-10 21:14:14,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:14,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:14,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091653381] [2021-03-10 21:14:14,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:14,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:14,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:14,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:14,976 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:15,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:15,101 INFO L93 Difference]: Finished difference Result 221 states and 558 transitions. [2021-03-10 21:14:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:15,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:15,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:15,102 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:14:15,102 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 21:14:15,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:15,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 21:14:15,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 179. [2021-03-10 21:14:15,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.5842696629213484) internal successors, (460), 178 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:15,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 460 transitions. [2021-03-10 21:14:15,105 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 460 transitions. Word has length 15 [2021-03-10 21:14:15,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:15,105 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 460 transitions. [2021-03-10 21:14:15,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:15,105 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 460 transitions. [2021-03-10 21:14:15,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:15,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:15,105 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:15,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:15,306 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:15,306 INFO L82 PathProgramCache]: Analyzing trace with hash 833223925, now seen corresponding path program 65 times [2021-03-10 21:14:15,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:15,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026032194] [2021-03-10 21:14:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:15,308 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:15,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483811082] [2021-03-10 21:14:15,308 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 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 21:14:15,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:15,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:15,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:15,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:15,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026032194] [2021-03-10 21:14:15,428 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:15,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483811082] [2021-03-10 21:14:15,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:15,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:15,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981339351] [2021-03-10 21:14:15,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:15,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:15,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:15,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:15,429 INFO L87 Difference]: Start difference. First operand 179 states and 460 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:15,528 INFO L93 Difference]: Finished difference Result 242 states and 593 transitions. [2021-03-10 21:14:15,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:15,528 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:15,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:15,529 INFO L225 Difference]: With dead ends: 242 [2021-03-10 21:14:15,529 INFO L226 Difference]: Without dead ends: 237 [2021-03-10 21:14:15,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:15,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-03-10 21:14:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 178. [2021-03-10 21:14:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.5875706214689265) internal successors, (458), 177 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 458 transitions. [2021-03-10 21:14:15,532 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 458 transitions. Word has length 15 [2021-03-10 21:14:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:15,532 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 458 transitions. [2021-03-10 21:14:15,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 458 transitions. [2021-03-10 21:14:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:15,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:15,532 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:15,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:15,733 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:15,733 INFO L82 PathProgramCache]: Analyzing trace with hash 640027, now seen corresponding path program 66 times [2021-03-10 21:14:15,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:15,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508145306] [2021-03-10 21:14:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:15,735 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:15,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795954925] [2021-03-10 21:14:15,735 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 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 21:14:15,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:15,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:15,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:14:15,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:15,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508145306] [2021-03-10 21:14:15,813 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:15,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795954925] [2021-03-10 21:14:15,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:15,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-03-10 21:14:15,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828819253] [2021-03-10 21:14:15,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:14:15,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:15,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:14:15,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:14:15,813 INFO L87 Difference]: Start difference. First operand 178 states and 458 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:15,905 INFO L93 Difference]: Finished difference Result 235 states and 577 transitions. [2021-03-10 21:14:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:15,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2021-03-10 21:14:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:15,907 INFO L225 Difference]: With dead ends: 235 [2021-03-10 21:14:15,907 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 21:14:15,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:15,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 21:14:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 183. [2021-03-10 21:14:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.6043956043956045) internal successors, (474), 182 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 474 transitions. [2021-03-10 21:14:15,909 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 474 transitions. Word has length 15 [2021-03-10 21:14:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:15,909 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 474 transitions. [2021-03-10 21:14:15,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:15,909 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 474 transitions. [2021-03-10 21:14:15,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:15,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:15,910 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:16,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:16,110 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:16,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:16,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1724965639, now seen corresponding path program 67 times [2021-03-10 21:14:16,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:16,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083292968] [2021-03-10 21:14:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:16,112 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:16,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636000265] [2021-03-10 21:14:16,112 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 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 21:14:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:16,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:16,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083292968] [2021-03-10 21:14:16,220 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:16,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636000265] [2021-03-10 21:14:16,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:16,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:16,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739112957] [2021-03-10 21:14:16,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:16,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:16,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:16,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:16,221 INFO L87 Difference]: Start difference. First operand 183 states and 474 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:16,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:16,317 INFO L93 Difference]: Finished difference Result 231 states and 582 transitions. [2021-03-10 21:14:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:16,317 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:16,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:16,318 INFO L225 Difference]: With dead ends: 231 [2021-03-10 21:14:16,318 INFO L226 Difference]: Without dead ends: 227 [2021-03-10 21:14:16,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-03-10 21:14:16,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 183. [2021-03-10 21:14:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.6043956043956045) internal successors, (474), 182 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 474 transitions. [2021-03-10 21:14:16,322 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 474 transitions. Word has length 15 [2021-03-10 21:14:16,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:16,322 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 474 transitions. [2021-03-10 21:14:16,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 474 transitions. [2021-03-10 21:14:16,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:16,323 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:16,323 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:16,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-03-10 21:14:16,536 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:16,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2128376761, now seen corresponding path program 68 times [2021-03-10 21:14:16,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:16,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239512304] [2021-03-10 21:14:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:16,539 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:16,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692736968] [2021-03-10 21:14:16,539 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:16,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:16,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:16,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:16,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:16,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239512304] [2021-03-10 21:14:16,646 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:16,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692736968] [2021-03-10 21:14:16,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:16,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:16,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585331423] [2021-03-10 21:14:16,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:16,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:16,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:16,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:16,647 INFO L87 Difference]: Start difference. First operand 183 states and 474 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:16,765 INFO L93 Difference]: Finished difference Result 237 states and 595 transitions. [2021-03-10 21:14:16,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:16,766 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:16,766 INFO L225 Difference]: With dead ends: 237 [2021-03-10 21:14:16,766 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 21:14:16,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:16,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 21:14:16,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 182. [2021-03-10 21:14:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.596685082872928) internal successors, (470), 181 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 470 transitions. [2021-03-10 21:14:16,769 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 470 transitions. Word has length 15 [2021-03-10 21:14:16,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:16,769 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 470 transitions. [2021-03-10 21:14:16,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:16,770 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 470 transitions. [2021-03-10 21:14:16,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:16,770 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:16,770 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:16,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:16,975 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:16,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:16,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1315572611, now seen corresponding path program 69 times [2021-03-10 21:14:16,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:16,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556215101] [2021-03-10 21:14:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:16,978 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:16,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791082656] [2021-03-10 21:14:16,978 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:16,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:16,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:16,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:14:16,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:17,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556215101] [2021-03-10 21:14:17,075 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:17,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791082656] [2021-03-10 21:14:17,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:17,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:17,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211048878] [2021-03-10 21:14:17,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:17,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:17,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:17,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:17,076 INFO L87 Difference]: Start difference. First operand 182 states and 470 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:17,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:17,193 INFO L93 Difference]: Finished difference Result 245 states and 603 transitions. [2021-03-10 21:14:17,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:17,194 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:17,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:17,195 INFO L225 Difference]: With dead ends: 245 [2021-03-10 21:14:17,195 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:14:17,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:14:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 181. [2021-03-10 21:14:17,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.588888888888889) internal successors, (466), 180 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 466 transitions. [2021-03-10 21:14:17,199 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 466 transitions. Word has length 15 [2021-03-10 21:14:17,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:17,200 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 466 transitions. [2021-03-10 21:14:17,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:17,200 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 466 transitions. [2021-03-10 21:14:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:17,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:17,200 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:17,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-03-10 21:14:17,401 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:17,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:17,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2146810787, now seen corresponding path program 70 times [2021-03-10 21:14:17,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:17,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760261437] [2021-03-10 21:14:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:17,403 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:17,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542520881] [2021-03-10 21:14:17,403 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 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 21:14:17,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:17,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:17,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:17,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:17,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760261437] [2021-03-10 21:14:17,515 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:17,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542520881] [2021-03-10 21:14:17,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:17,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:17,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747334461] [2021-03-10 21:14:17,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:17,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:17,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:17,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:17,515 INFO L87 Difference]: Start difference. First operand 181 states and 466 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:17,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:17,632 INFO L93 Difference]: Finished difference Result 232 states and 579 transitions. [2021-03-10 21:14:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:17,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:17,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:17,633 INFO L225 Difference]: With dead ends: 232 [2021-03-10 21:14:17,633 INFO L226 Difference]: Without dead ends: 229 [2021-03-10 21:14:17,633 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-03-10 21:14:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 181. [2021-03-10 21:14:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.588888888888889) internal successors, (466), 180 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 466 transitions. [2021-03-10 21:14:17,637 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 466 transitions. Word has length 15 [2021-03-10 21:14:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:17,637 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 466 transitions. [2021-03-10 21:14:17,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 466 transitions. [2021-03-10 21:14:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:17,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:17,637 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:17,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:17,854 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:17,854 INFO L82 PathProgramCache]: Analyzing trace with hash 421205121, now seen corresponding path program 71 times [2021-03-10 21:14:17,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:17,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464333965] [2021-03-10 21:14:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:17,856 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:17,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17586920] [2021-03-10 21:14:17,856 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 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 21:14:17,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:17,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:17,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:17,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:17,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464333965] [2021-03-10 21:14:17,956 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:17,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17586920] [2021-03-10 21:14:17,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:17,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:17,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565401715] [2021-03-10 21:14:17,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:17,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:17,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:17,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:17,957 INFO L87 Difference]: Start difference. First operand 181 states and 466 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:18,041 INFO L93 Difference]: Finished difference Result 228 states and 572 transitions. [2021-03-10 21:14:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:18,042 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:18,042 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:14:18,042 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 21:14:18,042 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:18,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 21:14:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 177. [2021-03-10 21:14:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.5625) internal successors, (451), 176 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 451 transitions. [2021-03-10 21:14:18,045 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 451 transitions. Word has length 15 [2021-03-10 21:14:18,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:18,045 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 451 transitions. [2021-03-10 21:14:18,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 451 transitions. [2021-03-10 21:14:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:18,045 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:18,045 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:18,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-03-10 21:14:18,246 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:18,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:18,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1576701703, now seen corresponding path program 72 times [2021-03-10 21:14:18,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:18,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860011252] [2021-03-10 21:14:18,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:18,248 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:18,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225021636] [2021-03-10 21:14:18,248 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 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 21:14:18,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:18,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:18,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:18,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:18,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:18,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:18,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:18,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:18,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:14:18,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:18,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:18,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:18,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:18,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-03-10 21:14:18,371 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-03-10 21:14:18,371 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 27 [2021-03-10 21:14:18,373 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:14:18,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:18,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-03-10 21:14:18,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:18,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:18,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:18,392 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-03-10 21:14:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:18,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860011252] [2021-03-10 21:14:18,444 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:18,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225021636] [2021-03-10 21:14:18,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:18,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:18,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729399455] [2021-03-10 21:14:18,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:18,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:18,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:18,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:18,445 INFO L87 Difference]: Start difference. First operand 177 states and 451 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:18,534 INFO L93 Difference]: Finished difference Result 209 states and 519 transitions. [2021-03-10 21:14:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:18,535 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:18,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:18,535 INFO L225 Difference]: With dead ends: 209 [2021-03-10 21:14:18,535 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 21:14:18,539 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 21:14:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 181. [2021-03-10 21:14:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.55) internal successors, (459), 180 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 459 transitions. [2021-03-10 21:14:18,542 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 459 transitions. Word has length 15 [2021-03-10 21:14:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:18,543 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 459 transitions. [2021-03-10 21:14:18,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 459 transitions. [2021-03-10 21:14:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:18,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:18,543 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:18,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:18,758 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:18,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1215828351, now seen corresponding path program 73 times [2021-03-10 21:14:18,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:18,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66350399] [2021-03-10 21:14:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:18,760 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:18,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981771084] [2021-03-10 21:14:18,760 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:18,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:18,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66350399] [2021-03-10 21:14:18,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:18,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981771084] [2021-03-10 21:14:18,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:18,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:18,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796591618] [2021-03-10 21:14:18,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:18,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:18,880 INFO L87 Difference]: Start difference. First operand 181 states and 459 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:18,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:18,994 INFO L93 Difference]: Finished difference Result 206 states and 514 transitions. [2021-03-10 21:14:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:18,995 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:18,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:18,995 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:14:18,995 INFO L226 Difference]: Without dead ends: 203 [2021-03-10 21:14:18,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:18,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-03-10 21:14:18,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 183. [2021-03-10 21:14:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5549450549450547) internal successors, (465), 182 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 465 transitions. [2021-03-10 21:14:18,998 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 465 transitions. Word has length 15 [2021-03-10 21:14:18,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:18,998 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 465 transitions. [2021-03-10 21:14:18,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:18,998 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 465 transitions. [2021-03-10 21:14:18,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:18,999 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:18,999 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:19,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:19,210 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:19,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:19,211 INFO L82 PathProgramCache]: Analyzing trace with hash 502515355, now seen corresponding path program 74 times [2021-03-10 21:14:19,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:19,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830387948] [2021-03-10 21:14:19,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:19,212 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:19,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414568472] [2021-03-10 21:14:19,212 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 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 21:14:19,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:19,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:19,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:19,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:19,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830387948] [2021-03-10 21:14:19,317 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:19,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414568472] [2021-03-10 21:14:19,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:19,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:19,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111033540] [2021-03-10 21:14:19,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:19,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:19,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:19,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:19,318 INFO L87 Difference]: Start difference. First operand 183 states and 465 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:19,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:19,479 INFO L93 Difference]: Finished difference Result 235 states and 578 transitions. [2021-03-10 21:14:19,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:19,480 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:19,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:19,480 INFO L225 Difference]: With dead ends: 235 [2021-03-10 21:14:19,480 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:14:19,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:14:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 185. [2021-03-10 21:14:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5706521739130435) internal successors, (473), 184 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 473 transitions. [2021-03-10 21:14:19,488 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 473 transitions. Word has length 15 [2021-03-10 21:14:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:19,488 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 473 transitions. [2021-03-10 21:14:19,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 473 transitions. [2021-03-10 21:14:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:19,489 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:19,489 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:19,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:19,703 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:19,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:19,703 INFO L82 PathProgramCache]: Analyzing trace with hash 391692835, now seen corresponding path program 75 times [2021-03-10 21:14:19,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:19,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406174398] [2021-03-10 21:14:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:19,705 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:19,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164896812] [2021-03-10 21:14:19,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:19,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:19,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:19,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:14:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:19,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406174398] [2021-03-10 21:14:19,784 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:19,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164896812] [2021-03-10 21:14:19,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:19,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-03-10 21:14:19,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986606751] [2021-03-10 21:14:19,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:14:19,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:19,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:14:19,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:14:19,784 INFO L87 Difference]: Start difference. First operand 185 states and 473 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:19,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:19,855 INFO L93 Difference]: Finished difference Result 240 states and 598 transitions. [2021-03-10 21:14:19,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:14:19,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2021-03-10 21:14:19,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:19,856 INFO L225 Difference]: With dead ends: 240 [2021-03-10 21:14:19,857 INFO L226 Difference]: Without dead ends: 223 [2021-03-10 21:14:19,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-03-10 21:14:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 179. [2021-03-10 21:14:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.539325842696629) internal successors, (452), 178 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 452 transitions. [2021-03-10 21:14:19,859 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 452 transitions. Word has length 15 [2021-03-10 21:14:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:19,859 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 452 transitions. [2021-03-10 21:14:19,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 21:14:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 452 transitions. [2021-03-10 21:14:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:19,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:19,859 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:20,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:20,060 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:20,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:20,060 INFO L82 PathProgramCache]: Analyzing trace with hash -581479935, now seen corresponding path program 76 times [2021-03-10 21:14:20,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:20,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060105090] [2021-03-10 21:14:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:20,062 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:20,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306006689] [2021-03-10 21:14:20,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:20,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:20,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:20,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:20,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060105090] [2021-03-10 21:14:20,161 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:20,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306006689] [2021-03-10 21:14:20,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:20,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:20,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438098949] [2021-03-10 21:14:20,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:20,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:20,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:20,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:20,162 INFO L87 Difference]: Start difference. First operand 179 states and 452 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:20,301 INFO L93 Difference]: Finished difference Result 282 states and 672 transitions. [2021-03-10 21:14:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:20,301 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:20,302 INFO L225 Difference]: With dead ends: 282 [2021-03-10 21:14:20,302 INFO L226 Difference]: Without dead ends: 276 [2021-03-10 21:14:20,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:20,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-03-10 21:14:20,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 184. [2021-03-10 21:14:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.557377049180328) internal successors, (468), 183 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 468 transitions. [2021-03-10 21:14:20,305 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 468 transitions. Word has length 15 [2021-03-10 21:14:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:20,305 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 468 transitions. [2021-03-10 21:14:20,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:20,305 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 468 transitions. [2021-03-10 21:14:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:20,305 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:20,305 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:20,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:20,506 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:20,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:20,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1147567399, now seen corresponding path program 77 times [2021-03-10 21:14:20,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:20,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872790890] [2021-03-10 21:14:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:20,508 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:20,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403352437] [2021-03-10 21:14:20,508 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 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 21:14:20,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:20,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:20,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:14:20,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:20,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872790890] [2021-03-10 21:14:20,610 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:20,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403352437] [2021-03-10 21:14:20,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:20,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:20,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442514842] [2021-03-10 21:14:20,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:20,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:20,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:20,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:20,611 INFO L87 Difference]: Start difference. First operand 184 states and 468 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:20,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:20,726 INFO L93 Difference]: Finished difference Result 307 states and 724 transitions. [2021-03-10 21:14:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:20,726 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:20,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:20,727 INFO L225 Difference]: With dead ends: 307 [2021-03-10 21:14:20,727 INFO L226 Difference]: Without dead ends: 302 [2021-03-10 21:14:20,727 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:20,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-03-10 21:14:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 185. [2021-03-10 21:14:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5597826086956523) internal successors, (471), 184 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 471 transitions. [2021-03-10 21:14:20,730 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 471 transitions. Word has length 15 [2021-03-10 21:14:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:20,730 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 471 transitions. [2021-03-10 21:14:20,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 471 transitions. [2021-03-10 21:14:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:20,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:20,730 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:20,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:20,931 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1429056191, now seen corresponding path program 78 times [2021-03-10 21:14:20,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:20,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957772953] [2021-03-10 21:14:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:20,933 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:20,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541044492] [2021-03-10 21:14:20,933 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 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 21:14:20,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:20,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:20,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:14:20,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:20,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:20,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:20,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:20,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:20,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:14:21,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:21,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:21,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:21,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:21,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-03-10 21:14:21,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-03-10 21:14:21,031 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:14:21,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:21,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:21,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:21,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:21,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:21,045 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:16 [2021-03-10 21:14:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:21,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957772953] [2021-03-10 21:14:21,075 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:21,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541044492] [2021-03-10 21:14:21,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:21,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:21,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238844161] [2021-03-10 21:14:21,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:21,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:21,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:21,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:21,075 INFO L87 Difference]: Start difference. First operand 185 states and 471 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:21,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:21,187 INFO L93 Difference]: Finished difference Result 232 states and 578 transitions. [2021-03-10 21:14:21,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:21,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:21,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:21,188 INFO L225 Difference]: With dead ends: 232 [2021-03-10 21:14:21,188 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 21:14:21,188 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:21,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 21:14:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 185. [2021-03-10 21:14:21,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5597826086956523) internal successors, (471), 184 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 471 transitions. [2021-03-10 21:14:21,192 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 471 transitions. Word has length 15 [2021-03-10 21:14:21,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:21,192 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 471 transitions. [2021-03-10 21:14:21,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:21,192 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 471 transitions. [2021-03-10 21:14:21,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:21,192 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:21,192 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:21,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:21,407 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:21,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:21,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1719022205, now seen corresponding path program 79 times [2021-03-10 21:14:21,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:21,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686695631] [2021-03-10 21:14:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:21,409 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:21,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997321847] [2021-03-10 21:14:21,409 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 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 21:14:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:21,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:21,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:21,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686695631] [2021-03-10 21:14:21,505 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:21,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997321847] [2021-03-10 21:14:21,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:21,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:21,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284878885] [2021-03-10 21:14:21,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:21,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:21,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:21,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:21,506 INFO L87 Difference]: Start difference. First operand 185 states and 471 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:21,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:21,623 INFO L93 Difference]: Finished difference Result 275 states and 670 transitions. [2021-03-10 21:14:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:21,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:21,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:21,624 INFO L225 Difference]: With dead ends: 275 [2021-03-10 21:14:21,625 INFO L226 Difference]: Without dead ends: 270 [2021-03-10 21:14:21,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-03-10 21:14:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 189. [2021-03-10 21:14:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.5851063829787235) internal successors, (486), 188 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 486 transitions. [2021-03-10 21:14:21,627 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 486 transitions. Word has length 15 [2021-03-10 21:14:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:21,628 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 486 transitions. [2021-03-10 21:14:21,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 486 transitions. [2021-03-10 21:14:21,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:21,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:21,628 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:21,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-03-10 21:14:21,828 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:21,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:21,829 INFO L82 PathProgramCache]: Analyzing trace with hash -857601385, now seen corresponding path program 80 times [2021-03-10 21:14:21,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:21,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925176868] [2021-03-10 21:14:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:21,830 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:21,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028027345] [2021-03-10 21:14:21,830 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 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 21:14:21,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:21,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:21,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:14:21,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:21,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925176868] [2021-03-10 21:14:21,919 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:21,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028027345] [2021-03-10 21:14:21,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:21,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:21,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399929822] [2021-03-10 21:14:21,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:21,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:21,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:21,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:21,919 INFO L87 Difference]: Start difference. First operand 189 states and 486 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:22,074 INFO L93 Difference]: Finished difference Result 289 states and 695 transitions. [2021-03-10 21:14:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:22,075 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:22,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:22,076 INFO L225 Difference]: With dead ends: 289 [2021-03-10 21:14:22,076 INFO L226 Difference]: Without dead ends: 285 [2021-03-10 21:14:22,076 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-03-10 21:14:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 190. [2021-03-10 21:14:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.5925925925925926) internal successors, (490), 189 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 490 transitions. [2021-03-10 21:14:22,079 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 490 transitions. Word has length 15 [2021-03-10 21:14:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:22,079 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 490 transitions. [2021-03-10 21:14:22,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 490 transitions. [2021-03-10 21:14:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:22,079 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:22,079 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:22,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:22,280 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:22,280 INFO L82 PathProgramCache]: Analyzing trace with hash 886438307, now seen corresponding path program 81 times [2021-03-10 21:14:22,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:22,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017281599] [2021-03-10 21:14:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:22,282 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:22,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735066929] [2021-03-10 21:14:22,282 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 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 21:14:22,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:22,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:22,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:22,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:22,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017281599] [2021-03-10 21:14:22,428 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:22,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735066929] [2021-03-10 21:14:22,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:22,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:22,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95466465] [2021-03-10 21:14:22,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:22,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:22,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:22,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:22,430 INFO L87 Difference]: Start difference. First operand 190 states and 490 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:22,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:22,528 INFO L93 Difference]: Finished difference Result 220 states and 554 transitions. [2021-03-10 21:14:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:22,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:22,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:22,529 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:14:22,529 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:14:22,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:22,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:14:22,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 190. [2021-03-10 21:14:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.5925925925925926) internal successors, (490), 189 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 490 transitions. [2021-03-10 21:14:22,533 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 490 transitions. Word has length 15 [2021-03-10 21:14:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:22,533 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 490 transitions. [2021-03-10 21:14:22,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 490 transitions. [2021-03-10 21:14:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:22,534 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:22,534 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:22,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-10 21:14:22,751 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:22,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:22,751 INFO L82 PathProgramCache]: Analyzing trace with hash -839167359, now seen corresponding path program 82 times [2021-03-10 21:14:22,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:22,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654610975] [2021-03-10 21:14:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:22,753 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:22,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752947464] [2021-03-10 21:14:22,753 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 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 21:14:22,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:22,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:22,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:22,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:22,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654610975] [2021-03-10 21:14:22,852 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:22,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752947464] [2021-03-10 21:14:22,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:22,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:22,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842736132] [2021-03-10 21:14:22,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:22,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:22,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:22,854 INFO L87 Difference]: Start difference. First operand 190 states and 490 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:22,966 INFO L93 Difference]: Finished difference Result 264 states and 660 transitions. [2021-03-10 21:14:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:22,967 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:22,967 INFO L225 Difference]: With dead ends: 264 [2021-03-10 21:14:22,967 INFO L226 Difference]: Without dead ends: 260 [2021-03-10 21:14:22,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:22,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-03-10 21:14:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 189. [2021-03-10 21:14:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.5851063829787235) internal successors, (486), 188 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 486 transitions. [2021-03-10 21:14:22,970 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 486 transitions. Word has length 15 [2021-03-10 21:14:22,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:22,971 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 486 transitions. [2021-03-10 21:14:22,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:22,971 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 486 transitions. [2021-03-10 21:14:22,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:22,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:22,971 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:23,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 21:14:23,172 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:23,172 INFO L82 PathProgramCache]: Analyzing trace with hash -429774331, now seen corresponding path program 83 times [2021-03-10 21:14:23,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:23,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155355056] [2021-03-10 21:14:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:23,175 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:23,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597353232] [2021-03-10 21:14:23,175 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 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 21:14:23,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:23,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:23,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:14:23,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:23,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155355056] [2021-03-10 21:14:23,264 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:23,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597353232] [2021-03-10 21:14:23,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:23,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:23,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735713254] [2021-03-10 21:14:23,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:23,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:23,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:23,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:23,265 INFO L87 Difference]: Start difference. First operand 189 states and 486 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:23,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:23,359 INFO L93 Difference]: Finished difference Result 269 states and 655 transitions. [2021-03-10 21:14:23,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:23,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:23,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:23,360 INFO L225 Difference]: With dead ends: 269 [2021-03-10 21:14:23,360 INFO L226 Difference]: Without dead ends: 264 [2021-03-10 21:14:23,361 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-03-10 21:14:23,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 184. [2021-03-10 21:14:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.5628415300546448) internal successors, (469), 183 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 469 transitions. [2021-03-10 21:14:23,364 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 469 transitions. Word has length 15 [2021-03-10 21:14:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:23,364 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 469 transitions. [2021-03-10 21:14:23,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:23,364 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 469 transitions. [2021-03-10 21:14:23,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:23,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:23,364 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:23,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-10 21:14:23,565 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:23,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1262358229, now seen corresponding path program 84 times [2021-03-10 21:14:23,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:23,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611902291] [2021-03-10 21:14:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:23,567 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:23,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390657521] [2021-03-10 21:14:23,567 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 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 21:14:23,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:23,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:23,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:23,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:23,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611902291] [2021-03-10 21:14:23,668 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:23,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390657521] [2021-03-10 21:14:23,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:23,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:23,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853760657] [2021-03-10 21:14:23,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:23,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:23,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:23,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:23,669 INFO L87 Difference]: Start difference. First operand 184 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:23,772 INFO L93 Difference]: Finished difference Result 225 states and 560 transitions. [2021-03-10 21:14:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:23,773 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:23,774 INFO L225 Difference]: With dead ends: 225 [2021-03-10 21:14:23,774 INFO L226 Difference]: Without dead ends: 222 [2021-03-10 21:14:23,774 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-03-10 21:14:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 184. [2021-03-10 21:14:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.5628415300546448) internal successors, (469), 183 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 469 transitions. [2021-03-10 21:14:23,776 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 469 transitions. Word has length 15 [2021-03-10 21:14:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:23,776 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 469 transitions. [2021-03-10 21:14:23,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 469 transitions. [2021-03-10 21:14:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:23,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:23,777 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:23,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 21:14:23,977 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:23,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:23,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1307003401, now seen corresponding path program 85 times [2021-03-10 21:14:23,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:23,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576722394] [2021-03-10 21:14:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:23,979 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:23,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697689687] [2021-03-10 21:14:23,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:23,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:23,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:24,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576722394] [2021-03-10 21:14:24,072 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:24,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697689687] [2021-03-10 21:14:24,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:24,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:24,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773339312] [2021-03-10 21:14:24,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:24,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:24,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:24,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:24,072 INFO L87 Difference]: Start difference. First operand 184 states and 469 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:24,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:24,168 INFO L93 Difference]: Finished difference Result 255 states and 632 transitions. [2021-03-10 21:14:24,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:24,168 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:24,169 INFO L225 Difference]: With dead ends: 255 [2021-03-10 21:14:24,169 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 21:14:24,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:24,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 21:14:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 182. [2021-03-10 21:14:24,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.546961325966851) internal successors, (461), 181 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 461 transitions. [2021-03-10 21:14:24,171 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 461 transitions. Word has length 15 [2021-03-10 21:14:24,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:24,171 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 461 transitions. [2021-03-10 21:14:24,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:24,172 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 461 transitions. [2021-03-10 21:14:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:24,172 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:24,172 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:24,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 21:14:24,372 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:24,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:24,372 INFO L82 PathProgramCache]: Analyzing trace with hash -690903423, now seen corresponding path program 86 times [2021-03-10 21:14:24,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:24,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653578012] [2021-03-10 21:14:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:24,374 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:24,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205294050] [2021-03-10 21:14:24,374 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 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 21:14:24,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:24,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:24,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:14:24,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:24,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653578012] [2021-03-10 21:14:24,473 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:24,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205294050] [2021-03-10 21:14:24,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:24,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:24,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795016316] [2021-03-10 21:14:24,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:24,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:24,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:24,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:24,473 INFO L87 Difference]: Start difference. First operand 182 states and 461 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:24,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:24,579 INFO L93 Difference]: Finished difference Result 221 states and 547 transitions. [2021-03-10 21:14:24,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:24,580 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:24,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:24,580 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:14:24,580 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 21:14:24,580 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 21:14:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 180. [2021-03-10 21:14:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.558659217877095) internal successors, (458), 179 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 458 transitions. [2021-03-10 21:14:24,583 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 458 transitions. Word has length 15 [2021-03-10 21:14:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:24,583 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 458 transitions. [2021-03-10 21:14:24,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 458 transitions. [2021-03-10 21:14:24,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:24,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:24,583 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:24,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:24,784 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:24,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1671806591, now seen corresponding path program 87 times [2021-03-10 21:14:24,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:24,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421405663] [2021-03-10 21:14:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:24,786 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:24,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867638682] [2021-03-10 21:14:24,786 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 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 21:14:24,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:24,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:24,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:14:24,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:24,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421405663] [2021-03-10 21:14:24,873 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:24,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867638682] [2021-03-10 21:14:24,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:24,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:24,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301525843] [2021-03-10 21:14:24,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:24,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:24,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:24,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:24,874 INFO L87 Difference]: Start difference. First operand 180 states and 458 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:24,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:24,976 INFO L93 Difference]: Finished difference Result 246 states and 602 transitions. [2021-03-10 21:14:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:24,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:24,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:24,977 INFO L225 Difference]: With dead ends: 246 [2021-03-10 21:14:24,977 INFO L226 Difference]: Without dead ends: 242 [2021-03-10 21:14:24,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:24,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-03-10 21:14:24,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 177. [2021-03-10 21:14:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.539772727272727) internal successors, (447), 176 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 447 transitions. [2021-03-10 21:14:24,980 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 447 transitions. Word has length 15 [2021-03-10 21:14:24,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:24,980 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 447 transitions. [2021-03-10 21:14:24,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 447 transitions. [2021-03-10 21:14:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:24,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:24,980 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:25,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-03-10 21:14:25,181 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:25,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1920083453, now seen corresponding path program 88 times [2021-03-10 21:14:25,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:25,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053797396] [2021-03-10 21:14:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:25,183 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:25,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927553781] [2021-03-10 21:14:25,183 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 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 21:14:25,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:25,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:25,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:25,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:25,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053797396] [2021-03-10 21:14:25,293 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:25,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927553781] [2021-03-10 21:14:25,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:25,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:25,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764244390] [2021-03-10 21:14:25,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:25,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:25,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:25,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:25,294 INFO L87 Difference]: Start difference. First operand 177 states and 447 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:25,457 INFO L93 Difference]: Finished difference Result 221 states and 538 transitions. [2021-03-10 21:14:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:14:25,458 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-03-10 21:14:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:25,459 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:14:25,459 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 21:14:25,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:25,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 21:14:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 176. [2021-03-10 21:14:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.525714285714286) internal successors, (442), 175 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 442 transitions. [2021-03-10 21:14:25,461 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 442 transitions. Word has length 15 [2021-03-10 21:14:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:25,461 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 442 transitions. [2021-03-10 21:14:25,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 21:14:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 442 transitions. [2021-03-10 21:14:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:25,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:25,461 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:25,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-10 21:14:25,662 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:25,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:25,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1523865919, now seen corresponding path program 89 times [2021-03-10 21:14:25,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:25,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582371746] [2021-03-10 21:14:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:25,664 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:25,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812649219] [2021-03-10 21:14:25,664 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 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 21:14:25,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:25,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:25,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:14:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:25,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:25,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:25,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:25,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:25,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-03-10 21:14:25,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:25,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:25,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:25,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:25,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-03-10 21:14:25,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:25,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:25,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:25,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-03-10 21:14:25,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:25,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:25,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:25,791 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:16 [2021-03-10 21:14:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:25,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582371746] [2021-03-10 21:14:25,809 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:25,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812649219] [2021-03-10 21:14:25,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:25,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:25,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433126265] [2021-03-10 21:14:25,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:25,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:25,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:25,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:25,810 INFO L87 Difference]: Start difference. First operand 176 states and 442 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:25,913 INFO L93 Difference]: Finished difference Result 216 states and 526 transitions. [2021-03-10 21:14:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:25,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:25,914 INFO L225 Difference]: With dead ends: 216 [2021-03-10 21:14:25,914 INFO L226 Difference]: Without dead ends: 211 [2021-03-10 21:14:25,914 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:25,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-10 21:14:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 176. [2021-03-10 21:14:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.52) internal successors, (441), 175 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 441 transitions. [2021-03-10 21:14:25,916 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 441 transitions. Word has length 15 [2021-03-10 21:14:25,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:25,916 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 441 transitions. [2021-03-10 21:14:25,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:25,916 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 441 transitions. [2021-03-10 21:14:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:14:25,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:25,916 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:26,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-10 21:14:26,117 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:26,117 INFO L82 PathProgramCache]: Analyzing trace with hash 194477787, now seen corresponding path program 90 times [2021-03-10 21:14:26,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:26,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422293621] [2021-03-10 21:14:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:26,119 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:26,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602627132] [2021-03-10 21:14:26,119 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 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 21:14:26,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:26,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:26,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:14:26,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:26,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422293621] [2021-03-10 21:14:26,218 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:26,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602627132] [2021-03-10 21:14:26,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:26,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:14:26,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410367969] [2021-03-10 21:14:26,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:26,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:26,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:26,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:26,219 INFO L87 Difference]: Start difference. First operand 176 states and 441 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:26,371 INFO L93 Difference]: Finished difference Result 260 states and 623 transitions. [2021-03-10 21:14:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 15 [2021-03-10 21:14:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:26,372 INFO L225 Difference]: With dead ends: 260 [2021-03-10 21:14:26,372 INFO L226 Difference]: Without dead ends: 256 [2021-03-10 21:14:26,372 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:26,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-03-10 21:14:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 174. [2021-03-10 21:14:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.508670520231214) internal successors, (434), 173 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 434 transitions. [2021-03-10 21:14:26,375 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 434 transitions. Word has length 15 [2021-03-10 21:14:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:26,375 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 434 transitions. [2021-03-10 21:14:26,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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 21:14:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 434 transitions. [2021-03-10 21:14:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:26,375 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:26,375 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:26,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-03-10 21:14:26,576 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:26,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1436869033, now seen corresponding path program 91 times [2021-03-10 21:14:26,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:26,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389477329] [2021-03-10 21:14:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:26,578 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:26,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831477849] [2021-03-10 21:14:26,579 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 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 21:14:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:26,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:26,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:26,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:26,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:26,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:26,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:26,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2021-03-10 21:14:26,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:26,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:26,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:26,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:26,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2021-03-10 21:14:26,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:26,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:26,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:26,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:26,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-03-10 21:14:26,708 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:26,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:14:26,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:26,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:26,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:14:26,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:26,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:26,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:26,727 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:14:26,778 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 21:14:26,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389477329] [2021-03-10 21:14:26,779 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:26,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831477849] [2021-03-10 21:14:26,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:26,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:26,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69096562] [2021-03-10 21:14:26,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:26,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:26,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:26,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:26,780 INFO L87 Difference]: Start difference. First operand 174 states and 434 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:26,980 INFO L93 Difference]: Finished difference Result 211 states and 510 transitions. [2021-03-10 21:14:26,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:26,980 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:26,981 INFO L225 Difference]: With dead ends: 211 [2021-03-10 21:14:26,981 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 21:14:26,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 21:14:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 183. [2021-03-10 21:14:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5) internal successors, (455), 182 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 455 transitions. [2021-03-10 21:14:26,983 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 455 transitions. Word has length 16 [2021-03-10 21:14:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:26,983 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 455 transitions. [2021-03-10 21:14:26,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 455 transitions. [2021-03-10 21:14:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:26,984 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:26,984 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:27,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:27,184 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:27,184 INFO L82 PathProgramCache]: Analyzing trace with hash 565945223, now seen corresponding path program 92 times [2021-03-10 21:14:27,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:27,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758117897] [2021-03-10 21:14:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:27,186 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:27,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95995743] [2021-03-10 21:14:27,187 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 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 21:14:27,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:27,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:27,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:14:27,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:27,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758117897] [2021-03-10 21:14:27,268 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:27,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95995743] [2021-03-10 21:14:27,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:27,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-03-10 21:14:27,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971356802] [2021-03-10 21:14:27,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:14:27,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:27,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:14:27,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:14:27,269 INFO L87 Difference]: Start difference. First operand 183 states and 455 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:27,349 INFO L93 Difference]: Finished difference Result 236 states and 555 transitions. [2021-03-10 21:14:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:27,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:27,350 INFO L225 Difference]: With dead ends: 236 [2021-03-10 21:14:27,350 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:14:27,350 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:14:27,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 167. [2021-03-10 21:14:27,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.4578313253012047) internal successors, (408), 166 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 21:14:27,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 408 transitions. [2021-03-10 21:14:27,352 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 408 transitions. Word has length 16 [2021-03-10 21:14:27,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:27,352 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 408 transitions. [2021-03-10 21:14:27,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,352 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 408 transitions. [2021-03-10 21:14:27,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:27,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:27,353 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:27,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:27,553 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash 447860743, now seen corresponding path program 93 times [2021-03-10 21:14:27,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:27,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560839473] [2021-03-10 21:14:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:27,556 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:27,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134486959] [2021-03-10 21:14:27,556 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 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 21:14:27,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:27,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:27,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:14:27,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:27,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:27,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:27,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:27,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:27,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-03-10 21:14:27,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:27,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:27,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:27,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:27,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-03-10 21:14:27,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:27,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:27,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:27,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:27,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2021-03-10 21:14:27,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:27,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:27,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:27,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:27,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:27,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:27,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:27,789 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:31 [2021-03-10 21:14:27,830 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 21:14:27,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560839473] [2021-03-10 21:14:27,831 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:27,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134486959] [2021-03-10 21:14:27,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:27,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-03-10 21:14:27,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570807912] [2021-03-10 21:14:27,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:14:27,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:27,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:14:27,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:27,832 INFO L87 Difference]: Start difference. First operand 167 states and 408 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:27,987 INFO L93 Difference]: Finished difference Result 196 states and 457 transitions. [2021-03-10 21:14:27,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:27,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:27,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:27,988 INFO L225 Difference]: With dead ends: 196 [2021-03-10 21:14:27,988 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 21:14:27,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:27,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 21:14:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 172. [2021-03-10 21:14:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.47953216374269) internal successors, (424), 171 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 424 transitions. [2021-03-10 21:14:27,991 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 424 transitions. Word has length 16 [2021-03-10 21:14:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:27,991 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 424 transitions. [2021-03-10 21:14:27,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 424 transitions. [2021-03-10 21:14:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:27,992 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:27,992 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:28,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-10 21:14:28,199 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:28,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2128762847, now seen corresponding path program 94 times [2021-03-10 21:14:28,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:28,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50156889] [2021-03-10 21:14:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:28,201 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:28,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101662005] [2021-03-10 21:14:28,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:14:28,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:28,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:28,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:28,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:28,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:28,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:28,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-03-10 21:14:28,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:28,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:28,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-03-10 21:14:28,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:28,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:28,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:14:28,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:14:28,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:28,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:14:28,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:28,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,362 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:28,399 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 21:14:28,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50156889] [2021-03-10 21:14:28,399 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:28,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101662005] [2021-03-10 21:14:28,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:28,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:28,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575817349] [2021-03-10 21:14:28,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:28,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:28,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:28,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:28,400 INFO L87 Difference]: Start difference. First operand 172 states and 424 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:28,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:28,533 INFO L93 Difference]: Finished difference Result 206 states and 482 transitions. [2021-03-10 21:14:28,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:28,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:28,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:28,534 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:14:28,534 INFO L226 Difference]: Without dead ends: 203 [2021-03-10 21:14:28,534 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:28,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-03-10 21:14:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 173. [2021-03-10 21:14:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.488372093023256) internal successors, (428), 172 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 428 transitions. [2021-03-10 21:14:28,536 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 428 transitions. Word has length 16 [2021-03-10 21:14:28,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:28,536 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 428 transitions. [2021-03-10 21:14:28,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 428 transitions. [2021-03-10 21:14:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:28,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:28,537 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:28,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-10 21:14:28,737 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:28,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2110328821, now seen corresponding path program 95 times [2021-03-10 21:14:28,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:28,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897059967] [2021-03-10 21:14:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:28,739 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:28,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063880523] [2021-03-10 21:14:28,739 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:28,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:28,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:28,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:28,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:28,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:28,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:28,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2021-03-10 21:14:28,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:28,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:28,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-03-10 21:14:28,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:28,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:28,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-03-10 21:14:28,877 INFO L446 ElimStorePlain]: Different costs {0=[v_A_59], 5=[F]} [2021-03-10 21:14:28,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:28,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:28,900 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:28,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:14:28,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:28,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:28,907 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:14:28,953 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 21:14:28,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897059967] [2021-03-10 21:14:28,953 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:28,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063880523] [2021-03-10 21:14:28,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:28,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:28,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136077806] [2021-03-10 21:14:28,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:28,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:28,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:28,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:28,954 INFO L87 Difference]: Start difference. First operand 173 states and 428 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:29,087 INFO L93 Difference]: Finished difference Result 202 states and 477 transitions. [2021-03-10 21:14:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:29,087 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:29,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:29,088 INFO L225 Difference]: With dead ends: 202 [2021-03-10 21:14:29,088 INFO L226 Difference]: Without dead ends: 199 [2021-03-10 21:14:29,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-03-10 21:14:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 174. [2021-03-10 21:14:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.4971098265895955) internal successors, (432), 173 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 432 transitions. [2021-03-10 21:14:29,091 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 432 transitions. Word has length 16 [2021-03-10 21:14:29,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:29,091 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 432 transitions. [2021-03-10 21:14:29,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 432 transitions. [2021-03-10 21:14:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:29,092 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:29,092 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:29,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:29,299 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:29,299 INFO L82 PathProgramCache]: Analyzing trace with hash -794171517, now seen corresponding path program 96 times [2021-03-10 21:14:29,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:29,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255494337] [2021-03-10 21:14:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:29,301 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:29,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381324685] [2021-03-10 21:14:29,301 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:29,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:29,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:29,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:29,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:29,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:29,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:29,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2021-03-10 21:14:29,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:29,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:29,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-03-10 21:14:29,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:29,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:29,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-03-10 21:14:29,440 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:29,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:14:29,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:29,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:14:29,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:29,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,456 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:14:29,507 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 21:14:29,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255494337] [2021-03-10 21:14:29,507 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:29,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381324685] [2021-03-10 21:14:29,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:29,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:29,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508078086] [2021-03-10 21:14:29,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:29,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:29,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:29,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:29,507 INFO L87 Difference]: Start difference. First operand 174 states and 432 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:29,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:29,645 INFO L93 Difference]: Finished difference Result 206 states and 490 transitions. [2021-03-10 21:14:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:29,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:29,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:29,647 INFO L225 Difference]: With dead ends: 206 [2021-03-10 21:14:29,647 INFO L226 Difference]: Without dead ends: 203 [2021-03-10 21:14:29,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-03-10 21:14:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 175. [2021-03-10 21:14:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5057471264367814) internal successors, (436), 174 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 436 transitions. [2021-03-10 21:14:29,650 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 436 transitions. Word has length 16 [2021-03-10 21:14:29,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:29,650 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 436 transitions. [2021-03-10 21:14:29,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:29,650 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 436 transitions. [2021-03-10 21:14:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:29,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:29,651 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:29,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-10 21:14:29,855 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:29,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1351999243, now seen corresponding path program 97 times [2021-03-10 21:14:29,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:29,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572985071] [2021-03-10 21:14:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:29,858 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:29,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376681030] [2021-03-10 21:14:29,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:29,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:29,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:29,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:29,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:29,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-03-10 21:14:29,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:29,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:29,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-03-10 21:14:29,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:29,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:29,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-03-10 21:14:29,978 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:29,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:14:29,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:29,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:14:29,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:29,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:29,994 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:14:30,043 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 21:14:30,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572985071] [2021-03-10 21:14:30,043 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:30,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376681030] [2021-03-10 21:14:30,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:30,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:30,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645519703] [2021-03-10 21:14:30,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:30,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:30,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:30,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:30,047 INFO L87 Difference]: Start difference. First operand 175 states and 436 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:30,272 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2021-03-10 21:14:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:30,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:30,274 INFO L225 Difference]: With dead ends: 210 [2021-03-10 21:14:30,274 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 21:14:30,274 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:30,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 21:14:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 176. [2021-03-10 21:14:30,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.5085714285714285) internal successors, (439), 175 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 439 transitions. [2021-03-10 21:14:30,277 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 439 transitions. Word has length 16 [2021-03-10 21:14:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:30,278 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 439 transitions. [2021-03-10 21:14:30,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 439 transitions. [2021-03-10 21:14:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:30,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:30,278 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:30,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:30,487 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:30,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:30,487 INFO L82 PathProgramCache]: Analyzing trace with hash 257907655, now seen corresponding path program 98 times [2021-03-10 21:14:30,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:30,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852623564] [2021-03-10 21:14:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:30,490 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:30,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7291971] [2021-03-10 21:14:30,490 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 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 21:14:30,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:30,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:30,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:30,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:30,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:30,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:30,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:30,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:30,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-03-10 21:14:30,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:30,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:30,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:30,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:30,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-03-10 21:14:30,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:30,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:30,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:30,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:30,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-03-10 21:14:30,606 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:30,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:14:30,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:30,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:30,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:14:30,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:30,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:30,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:30,622 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:14:30,669 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 21:14:30,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852623564] [2021-03-10 21:14:30,669 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:30,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7291971] [2021-03-10 21:14:30,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:30,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:30,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286651198] [2021-03-10 21:14:30,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:30,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:30,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:30,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:30,670 INFO L87 Difference]: Start difference. First operand 176 states and 439 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:30,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:30,846 INFO L93 Difference]: Finished difference Result 223 states and 531 transitions. [2021-03-10 21:14:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:30,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:30,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:30,847 INFO L225 Difference]: With dead ends: 223 [2021-03-10 21:14:30,847 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 21:14:30,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 21:14:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 180. [2021-03-10 21:14:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.53072625698324) internal successors, (453), 179 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 453 transitions. [2021-03-10 21:14:30,850 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 453 transitions. Word has length 16 [2021-03-10 21:14:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:30,850 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 453 transitions. [2021-03-10 21:14:30,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 453 transitions. [2021-03-10 21:14:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:30,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:30,851 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:31,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-03-10 21:14:31,059 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:31,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:31,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1618953449, now seen corresponding path program 99 times [2021-03-10 21:14:31,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:31,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135302160] [2021-03-10 21:14:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:31,061 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:31,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575689693] [2021-03-10 21:14:31,061 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 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 21:14:31,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:31,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:31,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:31,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:31,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:31,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:31,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:14:31,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:31,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:31,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:31,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:31,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:31,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-03-10 21:14:31,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:14:31,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:31,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:14:31,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:31,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,223 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:31,243 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 21:14:31,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135302160] [2021-03-10 21:14:31,244 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:31,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575689693] [2021-03-10 21:14:31,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:31,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:31,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034359400] [2021-03-10 21:14:31,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:31,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:31,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:31,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:31,244 INFO L87 Difference]: Start difference. First operand 180 states and 453 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:31,335 INFO L93 Difference]: Finished difference Result 193 states and 475 transitions. [2021-03-10 21:14:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:31,336 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:31,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:31,336 INFO L225 Difference]: With dead ends: 193 [2021-03-10 21:14:31,336 INFO L226 Difference]: Without dead ends: 190 [2021-03-10 21:14:31,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:31,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-03-10 21:14:31,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 182. [2021-03-10 21:14:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.5359116022099446) internal successors, (459), 181 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 459 transitions. [2021-03-10 21:14:31,339 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 459 transitions. Word has length 16 [2021-03-10 21:14:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:31,339 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 459 transitions. [2021-03-10 21:14:31,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 459 transitions. [2021-03-10 21:14:31,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:31,340 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:31,340 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:31,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:31,555 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:31,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:31,555 INFO L82 PathProgramCache]: Analyzing trace with hash -946966513, now seen corresponding path program 100 times [2021-03-10 21:14:31,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:31,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716284129] [2021-03-10 21:14:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:31,557 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:31,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416379499] [2021-03-10 21:14:31,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:31,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:31,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:31,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:31,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:31,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:31,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:31,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:14:31,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:31,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:31,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:31,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:31,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:31,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-03-10 21:14:31,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:14:31,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:31,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:14:31,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:31,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:31,738 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:31,764 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 21:14:31,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716284129] [2021-03-10 21:14:31,764 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:31,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416379499] [2021-03-10 21:14:31,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:31,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:31,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872275300] [2021-03-10 21:14:31,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:31,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:31,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:31,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:31,765 INFO L87 Difference]: Start difference. First operand 182 states and 459 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:31,932 INFO L93 Difference]: Finished difference Result 200 states and 492 transitions. [2021-03-10 21:14:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:31,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:31,933 INFO L225 Difference]: With dead ends: 200 [2021-03-10 21:14:31,933 INFO L226 Difference]: Without dead ends: 197 [2021-03-10 21:14:31,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-03-10 21:14:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 183. [2021-03-10 21:14:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5384615384615383) internal successors, (462), 182 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 462 transitions. [2021-03-10 21:14:31,935 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 462 transitions. Word has length 16 [2021-03-10 21:14:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:31,935 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 462 transitions. [2021-03-10 21:14:31,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 462 transitions. [2021-03-10 21:14:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:31,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:31,935 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:32,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-10 21:14:32,136 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:32,136 INFO L82 PathProgramCache]: Analyzing trace with hash 771377193, now seen corresponding path program 101 times [2021-03-10 21:14:32,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:32,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567850078] [2021-03-10 21:14:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:32,138 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:32,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904767344] [2021-03-10 21:14:32,138 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 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 21:14:32,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:32,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:32,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:32,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:32,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:32,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:32,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:14:32,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:32,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:32,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:32,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:32,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:32,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-03-10 21:14:32,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:32,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:32,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:32,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:32,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,289 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:32,323 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 21:14:32,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567850078] [2021-03-10 21:14:32,323 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:32,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904767344] [2021-03-10 21:14:32,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:32,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:32,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146840696] [2021-03-10 21:14:32,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:32,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:32,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:32,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:32,324 INFO L87 Difference]: Start difference. First operand 183 states and 462 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:32,475 INFO L93 Difference]: Finished difference Result 209 states and 516 transitions. [2021-03-10 21:14:32,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:32,475 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:32,476 INFO L225 Difference]: With dead ends: 209 [2021-03-10 21:14:32,476 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 21:14:32,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:32,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 21:14:32,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 183. [2021-03-10 21:14:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5384615384615383) internal successors, (462), 182 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 462 transitions. [2021-03-10 21:14:32,479 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 462 transitions. Word has length 16 [2021-03-10 21:14:32,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:32,479 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 462 transitions. [2021-03-10 21:14:32,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:32,480 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 462 transitions. [2021-03-10 21:14:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:32,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:32,480 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:32,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-03-10 21:14:32,701 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:32,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:32,701 INFO L82 PathProgramCache]: Analyzing trace with hash -375511707, now seen corresponding path program 102 times [2021-03-10 21:14:32,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:32,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202148643] [2021-03-10 21:14:32,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:32,703 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:32,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489721619] [2021-03-10 21:14:32,703 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 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 21:14:32,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:32,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:32,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:32,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:32,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:32,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:14:32,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:32,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:32,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:32,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:32,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:32,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-03-10 21:14:32,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:32,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:32,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:32,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:32,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:32,859 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:32,880 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 21:14:32,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202148643] [2021-03-10 21:14:32,880 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:32,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489721619] [2021-03-10 21:14:32,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:32,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:32,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449711871] [2021-03-10 21:14:32,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:32,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:32,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:32,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:32,881 INFO L87 Difference]: Start difference. First operand 183 states and 462 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:32,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:32,991 INFO L93 Difference]: Finished difference Result 197 states and 489 transitions. [2021-03-10 21:14:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:32,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:32,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:32,992 INFO L225 Difference]: With dead ends: 197 [2021-03-10 21:14:32,992 INFO L226 Difference]: Without dead ends: 194 [2021-03-10 21:14:32,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-03-10 21:14:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2021-03-10 21:14:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5434782608695654) internal successors, (468), 184 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 468 transitions. [2021-03-10 21:14:32,994 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 468 transitions. Word has length 16 [2021-03-10 21:14:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:32,994 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 468 transitions. [2021-03-10 21:14:32,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 468 transitions. [2021-03-10 21:14:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:32,994 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:32,994 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:33,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:33,195 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:33,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:33,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1342831999, now seen corresponding path program 103 times [2021-03-10 21:14:33,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:33,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427713888] [2021-03-10 21:14:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:33,197 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:33,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15074726] [2021-03-10 21:14:33,197 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 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 21:14:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:33,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:33,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:33,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:33,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:14:33,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:33,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:33,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:33,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:33,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:33,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-03-10 21:14:33,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:33,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:33,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:33,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:33,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,340 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:33,373 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 21:14:33,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427713888] [2021-03-10 21:14:33,373 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:33,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15074726] [2021-03-10 21:14:33,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:33,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:33,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254734367] [2021-03-10 21:14:33,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:33,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:33,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:33,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:33,374 INFO L87 Difference]: Start difference. First operand 185 states and 468 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:33,505 INFO L93 Difference]: Finished difference Result 207 states and 514 transitions. [2021-03-10 21:14:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:33,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:33,506 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:14:33,506 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:14:33,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:33,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:14:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 184. [2021-03-10 21:14:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.540983606557377) internal successors, (465), 183 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 465 transitions. [2021-03-10 21:14:33,508 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 465 transitions. Word has length 16 [2021-03-10 21:14:33,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:33,508 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 465 transitions. [2021-03-10 21:14:33,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:33,508 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 465 transitions. [2021-03-10 21:14:33,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:33,509 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:33,509 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:33,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:33,709 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:33,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1361266025, now seen corresponding path program 104 times [2021-03-10 21:14:33,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:33,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123519036] [2021-03-10 21:14:33,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:33,711 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:33,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286684874] [2021-03-10 21:14:33,711 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 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 21:14:33,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:33,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:33,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:33,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:33,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:33,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:33,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:14:33,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:33,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:33,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:33,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:33,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:33,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-03-10 21:14:33,835 INFO L446 ElimStorePlain]: Different costs {0=[v_A_77], 5=[F]} [2021-03-10 21:14:33,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:33,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:33,858 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:33,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:14:33,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:33,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:33,865 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:14:33,910 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 21:14:33,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123519036] [2021-03-10 21:14:33,910 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:33,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286684874] [2021-03-10 21:14:33,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:33,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:33,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731233616] [2021-03-10 21:14:33,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:33,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:33,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:33,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:33,911 INFO L87 Difference]: Start difference. First operand 184 states and 465 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:34,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:34,026 INFO L93 Difference]: Finished difference Result 200 states and 498 transitions. [2021-03-10 21:14:34,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:34,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:34,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:34,027 INFO L225 Difference]: With dead ends: 200 [2021-03-10 21:14:34,027 INFO L226 Difference]: Without dead ends: 197 [2021-03-10 21:14:34,027 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:34,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-03-10 21:14:34,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2021-03-10 21:14:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.540983606557377) internal successors, (465), 183 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:34,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 465 transitions. [2021-03-10 21:14:34,029 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 465 transitions. Word has length 16 [2021-03-10 21:14:34,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:34,029 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 465 transitions. [2021-03-10 21:14:34,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 465 transitions. [2021-03-10 21:14:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:34,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:34,030 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:34,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-03-10 21:14:34,230 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:34,230 INFO L82 PathProgramCache]: Analyzing trace with hash -191082135, now seen corresponding path program 105 times [2021-03-10 21:14:34,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:34,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089307805] [2021-03-10 21:14:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:34,232 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:34,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365446870] [2021-03-10 21:14:34,232 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 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 21:14:34,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:34,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:34,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:14:34,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:34,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089307805] [2021-03-10 21:14:34,352 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:34,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365446870] [2021-03-10 21:14:34,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:34,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:34,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82610700] [2021-03-10 21:14:34,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:34,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:34,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:34,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:34,353 INFO L87 Difference]: Start difference. First operand 184 states and 465 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:34,499 INFO L93 Difference]: Finished difference Result 260 states and 627 transitions. [2021-03-10 21:14:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:34,500 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:34,500 INFO L225 Difference]: With dead ends: 260 [2021-03-10 21:14:34,500 INFO L226 Difference]: Without dead ends: 253 [2021-03-10 21:14:34,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:34,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-03-10 21:14:34,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 185. [2021-03-10 21:14:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.527173913043478) internal successors, (465), 184 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 465 transitions. [2021-03-10 21:14:34,503 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 465 transitions. Word has length 16 [2021-03-10 21:14:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:34,503 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 465 transitions. [2021-03-10 21:14:34,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:34,503 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 465 transitions. [2021-03-10 21:14:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:34,503 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:34,503 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:34,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:34,704 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:34,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1770659053, now seen corresponding path program 106 times [2021-03-10 21:14:34,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:34,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233558549] [2021-03-10 21:14:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:34,706 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:34,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729699700] [2021-03-10 21:14:34,706 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 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 21:14:34,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:34,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:34,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:34,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:34,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:34,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:34,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:34,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:34,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:14:34,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:34,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:34,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:34,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:34,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-03-10 21:14:34,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:34,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:34,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:34,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:34,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-03-10 21:14:34,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:14:34,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:34,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:34,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:14:34,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:34,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:34,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:34,878 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:34,906 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 21:14:34,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233558549] [2021-03-10 21:14:34,906 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:34,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729699700] [2021-03-10 21:14:34,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:34,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:34,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705513275] [2021-03-10 21:14:34,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:34,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:34,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:34,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:34,907 INFO L87 Difference]: Start difference. First operand 185 states and 465 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:35,087 INFO L93 Difference]: Finished difference Result 210 states and 515 transitions. [2021-03-10 21:14:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:35,087 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:35,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:35,088 INFO L225 Difference]: With dead ends: 210 [2021-03-10 21:14:35,088 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 21:14:35,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 21:14:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 188. [2021-03-10 21:14:35,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5401069518716577) internal successors, (475), 187 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 475 transitions. [2021-03-10 21:14:35,091 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 475 transitions. Word has length 16 [2021-03-10 21:14:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:35,091 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 475 transitions. [2021-03-10 21:14:35,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 475 transitions. [2021-03-10 21:14:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:35,091 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:35,091 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:35,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-10 21:14:35,292 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:35,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:35,292 INFO L82 PathProgramCache]: Analyzing trace with hash -805964537, now seen corresponding path program 107 times [2021-03-10 21:14:35,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:35,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439569466] [2021-03-10 21:14:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:35,294 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:35,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622807851] [2021-03-10 21:14:35,294 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 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 21:14:35,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:35,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:35,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:35,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:35,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:35,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:35,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:14:35,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:35,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:35,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-03-10 21:14:35,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:35,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:35,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-03-10 21:14:35,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:35,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:35,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:35,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:35,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:35,488 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 21:14:35,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439569466] [2021-03-10 21:14:35,488 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:35,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622807851] [2021-03-10 21:14:35,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:35,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:35,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843977107] [2021-03-10 21:14:35,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:35,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:35,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:35,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:35,488 INFO L87 Difference]: Start difference. First operand 188 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:35,679 INFO L93 Difference]: Finished difference Result 220 states and 540 transitions. [2021-03-10 21:14:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:35,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:35,680 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:14:35,680 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:14:35,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:14:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 187. [2021-03-10 21:14:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.5376344086021505) internal successors, (472), 186 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 472 transitions. [2021-03-10 21:14:35,683 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 472 transitions. Word has length 16 [2021-03-10 21:14:35,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:35,683 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 472 transitions. [2021-03-10 21:14:35,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 472 transitions. [2021-03-10 21:14:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:35,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:35,683 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:35,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-10 21:14:35,893 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:35,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:35,893 INFO L82 PathProgramCache]: Analyzing trace with hash -787530511, now seen corresponding path program 108 times [2021-03-10 21:14:35,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:35,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921374646] [2021-03-10 21:14:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:35,894 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:35,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384200991] [2021-03-10 21:14:35,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:35,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:35,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:35,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:35,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:35,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:35,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:35,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:14:35,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:35,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:35,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-03-10 21:14:35,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:35,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:35,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:35,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-03-10 21:14:36,016 INFO L446 ElimStorePlain]: Different costs {0=[v_A_83], 5=[F]} [2021-03-10 21:14:36,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:36,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:36,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:36,038 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:36,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:14:36,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:36,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:36,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:36,045 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:14:36,092 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 21:14:36,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921374646] [2021-03-10 21:14:36,092 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:36,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384200991] [2021-03-10 21:14:36,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:36,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:36,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080457957] [2021-03-10 21:14:36,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:36,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:36,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:36,092 INFO L87 Difference]: Start difference. First operand 187 states and 472 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:36,231 INFO L93 Difference]: Finished difference Result 207 states and 515 transitions. [2021-03-10 21:14:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:36,231 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:36,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:36,232 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:14:36,232 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:14:36,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:36,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:14:36,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 186. [2021-03-10 21:14:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.535135135135135) internal successors, (469), 185 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 469 transitions. [2021-03-10 21:14:36,234 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 469 transitions. Word has length 16 [2021-03-10 21:14:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:36,234 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 469 transitions. [2021-03-10 21:14:36,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 469 transitions. [2021-03-10 21:14:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:36,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:36,235 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:36,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-03-10 21:14:36,455 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:36,456 INFO L82 PathProgramCache]: Analyzing trace with hash 528626793, now seen corresponding path program 109 times [2021-03-10 21:14:36,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:36,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315385831] [2021-03-10 21:14:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:36,459 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:36,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137213210] [2021-03-10 21:14:36,459 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 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 21:14:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:36,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:36,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:36,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:36,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:36,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:36,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:36,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:14:36,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:36,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:36,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:36,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:36,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-03-10 21:14:36,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:36,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:36,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:36,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:36,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-03-10 21:14:36,596 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:36,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:14:36,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:36,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:36,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:14:36,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:36,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:36,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:36,613 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:14:36,667 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 21:14:36,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315385831] [2021-03-10 21:14:36,667 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:36,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137213210] [2021-03-10 21:14:36,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:36,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:36,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695793685] [2021-03-10 21:14:36,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:36,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:36,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:36,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:36,668 INFO L87 Difference]: Start difference. First operand 186 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:36,827 INFO L93 Difference]: Finished difference Result 207 states and 516 transitions. [2021-03-10 21:14:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:36,827 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:36,828 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:14:36,828 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:14:36,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:36,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:14:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 186. [2021-03-10 21:14:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.535135135135135) internal successors, (469), 185 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 469 transitions. [2021-03-10 21:14:36,831 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 469 transitions. Word has length 16 [2021-03-10 21:14:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:36,831 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 469 transitions. [2021-03-10 21:14:36,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 469 transitions. [2021-03-10 21:14:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:36,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:36,831 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:37,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:37,044 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:37,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:37,044 INFO L82 PathProgramCache]: Analyzing trace with hash -417524123, now seen corresponding path program 110 times [2021-03-10 21:14:37,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:37,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942616126] [2021-03-10 21:14:37,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:37,046 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:37,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841694185] [2021-03-10 21:14:37,046 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 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 21:14:37,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:37,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:37,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:37,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:37,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:37,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:37,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:14:37,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:37,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:37,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-03-10 21:14:37,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:37,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:37,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:14:37,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:37,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:37,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:37,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:37,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,223 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:37,245 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 21:14:37,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942616126] [2021-03-10 21:14:37,245 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:37,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841694185] [2021-03-10 21:14:37,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:37,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:37,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409250613] [2021-03-10 21:14:37,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:37,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:37,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:37,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:37,246 INFO L87 Difference]: Start difference. First operand 186 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:37,393 INFO L93 Difference]: Finished difference Result 212 states and 518 transitions. [2021-03-10 21:14:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:37,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:37,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:37,394 INFO L225 Difference]: With dead ends: 212 [2021-03-10 21:14:37,394 INFO L226 Difference]: Without dead ends: 209 [2021-03-10 21:14:37,394 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:37,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-03-10 21:14:37,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 188. [2021-03-10 21:14:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5401069518716577) internal successors, (475), 187 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 475 transitions. [2021-03-10 21:14:37,396 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 475 transitions. Word has length 16 [2021-03-10 21:14:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:37,397 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 475 transitions. [2021-03-10 21:14:37,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 475 transitions. [2021-03-10 21:14:37,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:37,397 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:37,397 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:37,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-03-10 21:14:37,599 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:37,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:37,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1300819583, now seen corresponding path program 111 times [2021-03-10 21:14:37,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:37,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782378373] [2021-03-10 21:14:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:37,601 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:37,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636002987] [2021-03-10 21:14:37,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:37,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:37,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:37,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:37,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:37,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:37,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:37,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:14:37,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:37,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:37,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-03-10 21:14:37,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:37,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:37,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:14:37,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:14:37,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:37,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:14:37,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:37,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:37,743 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:37,778 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 21:14:37,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782378373] [2021-03-10 21:14:37,779 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:37,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636002987] [2021-03-10 21:14:37,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:37,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:37,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480328801] [2021-03-10 21:14:37,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:37,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:37,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:37,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:37,779 INFO L87 Difference]: Start difference. First operand 188 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:37,930 INFO L93 Difference]: Finished difference Result 222 states and 543 transitions. [2021-03-10 21:14:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:37,930 INFO L225 Difference]: With dead ends: 222 [2021-03-10 21:14:37,930 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:14:37,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:37,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:14:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 187. [2021-03-10 21:14:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.5376344086021505) internal successors, (472), 186 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 472 transitions. [2021-03-10 21:14:37,932 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 472 transitions. Word has length 16 [2021-03-10 21:14:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:37,933 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 472 transitions. [2021-03-10 21:14:37,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 472 transitions. [2021-03-10 21:14:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:37,933 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:37,933 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:38,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:38,133 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:38,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:38,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1319253609, now seen corresponding path program 112 times [2021-03-10 21:14:38,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:38,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508068724] [2021-03-10 21:14:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:38,136 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:38,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865194647] [2021-03-10 21:14:38,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:38,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:38,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:38,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:38,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:38,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:38,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:38,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:14:38,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:38,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:38,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-03-10 21:14:38,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:38,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:38,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:14:38,263 INFO L446 ElimStorePlain]: Different costs {0=[v_A_91], 5=[F]} [2021-03-10 21:14:38,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:38,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:38,285 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:38,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:14:38,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:38,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,291 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:14:38,339 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 21:14:38,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508068724] [2021-03-10 21:14:38,339 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:38,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865194647] [2021-03-10 21:14:38,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:38,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:38,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427961264] [2021-03-10 21:14:38,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:38,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:38,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:38,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:38,340 INFO L87 Difference]: Start difference. First operand 187 states and 472 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:38,487 INFO L93 Difference]: Finished difference Result 209 states and 518 transitions. [2021-03-10 21:14:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:38,487 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:38,488 INFO L225 Difference]: With dead ends: 209 [2021-03-10 21:14:38,488 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 21:14:38,488 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:38,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 21:14:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 186. [2021-03-10 21:14:38,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.535135135135135) internal successors, (469), 185 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 469 transitions. [2021-03-10 21:14:38,490 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 469 transitions. Word has length 16 [2021-03-10 21:14:38,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:38,490 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 469 transitions. [2021-03-10 21:14:38,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,490 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 469 transitions. [2021-03-10 21:14:38,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:38,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:38,490 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:38,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:38,691 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:38,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:38,691 INFO L82 PathProgramCache]: Analyzing trace with hash 216824293, now seen corresponding path program 113 times [2021-03-10 21:14:38,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:38,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201183695] [2021-03-10 21:14:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:38,693 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:38,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015196510] [2021-03-10 21:14:38,693 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 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 21:14:38,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:38,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:38,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:14:38,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:38,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:38,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:38,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-03-10 21:14:38,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:38,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:38,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-03-10 21:14:38,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:38,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:38,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-03-10 21:14:38,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:14:38,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:14:38,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-03-10 21:14:38,856 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:14:38,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:38,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:14:38,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:38,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:38,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:38,873 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:16 [2021-03-10 21:14:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:38,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201183695] [2021-03-10 21:14:38,893 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:38,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015196510] [2021-03-10 21:14:38,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:38,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:38,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145596214] [2021-03-10 21:14:38,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:38,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:38,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:38,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:38,893 INFO L87 Difference]: Start difference. First operand 186 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:38,996 INFO L93 Difference]: Finished difference Result 208 states and 508 transitions. [2021-03-10 21:14:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:38,997 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:38,997 INFO L225 Difference]: With dead ends: 208 [2021-03-10 21:14:38,997 INFO L226 Difference]: Without dead ends: 202 [2021-03-10 21:14:38,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-10 21:14:38,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 184. [2021-03-10 21:14:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.5355191256830603) internal successors, (464), 183 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 464 transitions. [2021-03-10 21:14:38,999 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 464 transitions. Word has length 16 [2021-03-10 21:14:39,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:39,000 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 464 transitions. [2021-03-10 21:14:39,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:39,000 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 464 transitions. [2021-03-10 21:14:39,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:39,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:39,000 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:39,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:39,200 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:39,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1659556383, now seen corresponding path program 114 times [2021-03-10 21:14:39,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:39,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644012178] [2021-03-10 21:14:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:39,203 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:39,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340259968] [2021-03-10 21:14:39,203 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 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 21:14:39,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:39,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:39,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:39,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:39,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:39,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:39,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:14:39,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:39,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:39,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-03-10 21:14:39,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:39,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:39,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-03-10 21:14:39,330 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:39,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:14:39,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:39,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:14:39,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:39,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,348 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:14:39,397 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 21:14:39,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644012178] [2021-03-10 21:14:39,397 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:39,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340259968] [2021-03-10 21:14:39,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:39,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:39,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212871620] [2021-03-10 21:14:39,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:39,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:39,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:39,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:39,397 INFO L87 Difference]: Start difference. First operand 184 states and 464 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:39,569 INFO L93 Difference]: Finished difference Result 207 states and 514 transitions. [2021-03-10 21:14:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:39,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:39,570 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:14:39,570 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:14:39,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:39,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:14:39,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 183. [2021-03-10 21:14:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5274725274725274) internal successors, (460), 182 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 460 transitions. [2021-03-10 21:14:39,572 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 460 transitions. Word has length 16 [2021-03-10 21:14:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:39,572 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 460 transitions. [2021-03-10 21:14:39,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 460 transitions. [2021-03-10 21:14:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:39,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:39,573 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:39,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:39,787 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash 486614377, now seen corresponding path program 115 times [2021-03-10 21:14:39,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:39,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533748745] [2021-03-10 21:14:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:39,789 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:39,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701123167] [2021-03-10 21:14:39,789 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 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 21:14:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:39,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:39,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:39,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:39,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:14:39,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:39,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:39,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-03-10 21:14:39,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:39,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:39,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-03-10 21:14:39,907 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:39,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:14:39,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:39,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:14:39,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:39,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:39,922 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:14:39,971 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 21:14:39,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533748745] [2021-03-10 21:14:39,971 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:39,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701123167] [2021-03-10 21:14:39,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:39,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:39,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522970333] [2021-03-10 21:14:39,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:39,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:39,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:39,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:39,971 INFO L87 Difference]: Start difference. First operand 183 states and 460 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:40,107 INFO L93 Difference]: Finished difference Result 207 states and 511 transitions. [2021-03-10 21:14:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:40,107 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:40,108 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:14:40,108 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:14:40,108 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:14:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 183. [2021-03-10 21:14:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5274725274725274) internal successors, (460), 182 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 460 transitions. [2021-03-10 21:14:40,110 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 460 transitions. Word has length 16 [2021-03-10 21:14:40,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:40,110 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 460 transitions. [2021-03-10 21:14:40,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 460 transitions. [2021-03-10 21:14:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:40,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:40,110 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:40,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-10 21:14:40,311 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:40,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:40,311 INFO L82 PathProgramCache]: Analyzing trace with hash 25375017, now seen corresponding path program 116 times [2021-03-10 21:14:40,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:40,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138510288] [2021-03-10 21:14:40,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:40,313 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:40,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204073630] [2021-03-10 21:14:40,313 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 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 21:14:40,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:40,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:40,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:40,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:40,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:40,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:40,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-03-10 21:14:40,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:40,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:40,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-03-10 21:14:40,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:40,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:40,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-03-10 21:14:40,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:40,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:40,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:40,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:40,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,472 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:40,493 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 21:14:40,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138510288] [2021-03-10 21:14:40,494 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:40,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204073630] [2021-03-10 21:14:40,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:40,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:40,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591576103] [2021-03-10 21:14:40,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:40,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:40,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:40,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:40,494 INFO L87 Difference]: Start difference. First operand 183 states and 460 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:40,630 INFO L93 Difference]: Finished difference Result 209 states and 510 transitions. [2021-03-10 21:14:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:40,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:40,631 INFO L225 Difference]: With dead ends: 209 [2021-03-10 21:14:40,631 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 21:14:40,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 21:14:40,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2021-03-10 21:14:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.543010752688172) internal successors, (473), 186 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 473 transitions. [2021-03-10 21:14:40,634 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 473 transitions. Word has length 16 [2021-03-10 21:14:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:40,634 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 473 transitions. [2021-03-10 21:14:40,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,634 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 473 transitions. [2021-03-10 21:14:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:40,634 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:40,634 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:40,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-10 21:14:40,847 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:40,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1743718723, now seen corresponding path program 117 times [2021-03-10 21:14:40,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:40,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579310390] [2021-03-10 21:14:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:40,849 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:40,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749483359] [2021-03-10 21:14:40,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:40,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:40,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:40,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:40,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:40,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:40,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:40,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-03-10 21:14:40,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:40,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:40,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-03-10 21:14:40,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:40,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:40,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:40,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:14:40,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:14:41,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:41,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:41,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:14:41,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:41,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:41,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:41,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:41,056 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 21:14:41,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579310390] [2021-03-10 21:14:41,056 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:41,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749483359] [2021-03-10 21:14:41,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:41,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:41,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090334219] [2021-03-10 21:14:41,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:41,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:41,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:41,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:41,057 INFO L87 Difference]: Start difference. First operand 187 states and 473 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:41,212 INFO L93 Difference]: Finished difference Result 219 states and 535 transitions. [2021-03-10 21:14:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:41,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:41,213 INFO L225 Difference]: With dead ends: 219 [2021-03-10 21:14:41,213 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 21:14:41,213 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 21:14:41,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 186. [2021-03-10 21:14:41,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.5405405405405403) internal successors, (470), 185 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 470 transitions. [2021-03-10 21:14:41,215 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 470 transitions. Word has length 16 [2021-03-10 21:14:41,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:41,215 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 470 transitions. [2021-03-10 21:14:41,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 470 transitions. [2021-03-10 21:14:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:41,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:41,215 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:41,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-10 21:14:41,416 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:41,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:41,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1762152749, now seen corresponding path program 118 times [2021-03-10 21:14:41,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:41,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375371951] [2021-03-10 21:14:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:41,418 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:41,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781119695] [2021-03-10 21:14:41,418 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 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 21:14:41,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:41,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:41,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:41,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:41,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:41,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:41,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:41,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:41,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-03-10 21:14:41,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:41,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:41,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:41,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:41,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-03-10 21:14:41,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:41,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:41,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:41,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:41,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:14:41,531 INFO L446 ElimStorePlain]: Different costs {0=[v_A_104], 5=[F]} [2021-03-10 21:14:41,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:41,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:41,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:41,553 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:41,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:14:41,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:41,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:41,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:41,559 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:14:41,605 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 21:14:41,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375371951] [2021-03-10 21:14:41,605 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:41,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781119695] [2021-03-10 21:14:41,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:41,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:41,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282519254] [2021-03-10 21:14:41,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:41,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:41,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:41,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:41,606 INFO L87 Difference]: Start difference. First operand 186 states and 470 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:41,781 INFO L93 Difference]: Finished difference Result 213 states and 523 transitions. [2021-03-10 21:14:41,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:41,782 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:41,782 INFO L225 Difference]: With dead ends: 213 [2021-03-10 21:14:41,782 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 21:14:41,782 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 21:14:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 185. [2021-03-10 21:14:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5380434782608696) internal successors, (467), 184 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 467 transitions. [2021-03-10 21:14:41,785 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 467 transitions. Word has length 16 [2021-03-10 21:14:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:41,785 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 467 transitions. [2021-03-10 21:14:41,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 467 transitions. [2021-03-10 21:14:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:41,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:41,785 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:41,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-03-10 21:14:41,986 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:41,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:41,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1216657243, now seen corresponding path program 119 times [2021-03-10 21:14:41,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:41,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723350644] [2021-03-10 21:14:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:41,988 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:41,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008042300] [2021-03-10 21:14:41,988 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 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 21:14:42,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:42,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:42,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:42,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:42,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:42,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:42,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-03-10 21:14:42,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:42,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:42,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-03-10 21:14:42,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:42,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:42,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-03-10 21:14:42,115 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:42,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:14:42,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:42,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:14:42,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:42,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,130 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:14:42,177 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 21:14:42,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723350644] [2021-03-10 21:14:42,177 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:42,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008042300] [2021-03-10 21:14:42,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:42,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:42,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256332059] [2021-03-10 21:14:42,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:42,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:42,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:42,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:42,178 INFO L87 Difference]: Start difference. First operand 185 states and 467 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:42,351 INFO L93 Difference]: Finished difference Result 216 states and 532 transitions. [2021-03-10 21:14:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:42,352 INFO L225 Difference]: With dead ends: 216 [2021-03-10 21:14:42,352 INFO L226 Difference]: Without dead ends: 213 [2021-03-10 21:14:42,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-03-10 21:14:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 184. [2021-03-10 21:14:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.530054644808743) internal successors, (463), 183 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 463 transitions. [2021-03-10 21:14:42,354 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 463 transitions. Word has length 16 [2021-03-10 21:14:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:42,354 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 463 transitions. [2021-03-10 21:14:42,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 463 transitions. [2021-03-10 21:14:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:42,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:42,355 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:42,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:42,555 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:42,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:42,556 INFO L82 PathProgramCache]: Analyzing trace with hash 929513517, now seen corresponding path program 120 times [2021-03-10 21:14:42,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:42,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900152834] [2021-03-10 21:14:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:42,558 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:42,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358445891] [2021-03-10 21:14:42,558 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 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 21:14:42,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:42,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:42,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:42,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:42,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:42,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:42,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-03-10 21:14:42,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:42,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:42,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-03-10 21:14:42,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:42,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:42,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-03-10 21:14:42,687 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:42,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:14:42,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:42,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:14:42,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:42,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:42,703 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:14:42,753 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 21:14:42,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900152834] [2021-03-10 21:14:42,753 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:42,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358445891] [2021-03-10 21:14:42,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:42,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:42,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104759241] [2021-03-10 21:14:42,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:42,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:42,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:42,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:42,754 INFO L87 Difference]: Start difference. First operand 184 states and 463 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:42,952 INFO L93 Difference]: Finished difference Result 219 states and 538 transitions. [2021-03-10 21:14:42,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:42,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:42,953 INFO L225 Difference]: With dead ends: 219 [2021-03-10 21:14:42,953 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 21:14:42,953 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 21:14:42,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 183. [2021-03-10 21:14:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5274725274725274) internal successors, (460), 182 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 460 transitions. [2021-03-10 21:14:42,955 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 460 transitions. Word has length 16 [2021-03-10 21:14:42,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:42,955 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 460 transitions. [2021-03-10 21:14:42,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,955 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 460 transitions. [2021-03-10 21:14:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:42,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:42,955 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:43,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-03-10 21:14:43,159 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:43,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:43,160 INFO L82 PathProgramCache]: Analyzing trace with hash -164578071, now seen corresponding path program 121 times [2021-03-10 21:14:43,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:43,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081345256] [2021-03-10 21:14:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:43,162 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:43,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912932702] [2021-03-10 21:14:43,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:43,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:43,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:43,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:43,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:43,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-03-10 21:14:43,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:43,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:43,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-03-10 21:14:43,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:43,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:43,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-03-10 21:14:43,279 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:43,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:14:43,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:43,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:14:43,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:43,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,299 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:14:43,346 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 21:14:43,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081345256] [2021-03-10 21:14:43,346 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:43,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912932702] [2021-03-10 21:14:43,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:43,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:43,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400107704] [2021-03-10 21:14:43,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:43,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:43,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:43,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:43,347 INFO L87 Difference]: Start difference. First operand 183 states and 460 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:43,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:43,505 INFO L93 Difference]: Finished difference Result 233 states and 574 transitions. [2021-03-10 21:14:43,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:43,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:43,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:43,506 INFO L225 Difference]: With dead ends: 233 [2021-03-10 21:14:43,506 INFO L226 Difference]: Without dead ends: 230 [2021-03-10 21:14:43,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-03-10 21:14:43,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 181. [2021-03-10 21:14:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.522222222222222) internal successors, (454), 180 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:43,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 454 transitions. [2021-03-10 21:14:43,508 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 454 transitions. Word has length 16 [2021-03-10 21:14:43,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:43,508 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 454 transitions. [2021-03-10 21:14:43,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:43,509 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 454 transitions. [2021-03-10 21:14:43,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:43,509 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:43,509 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:43,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-03-10 21:14:43,709 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:43,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:43,710 INFO L82 PathProgramCache]: Analyzing trace with hash -933648953, now seen corresponding path program 122 times [2021-03-10 21:14:43,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:43,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129618789] [2021-03-10 21:14:43,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:43,711 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:43,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460311137] [2021-03-10 21:14:43,711 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 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 21:14:43,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:43,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:43,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:43,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:43,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:43,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-03-10 21:14:43,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:43,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:43,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-03-10 21:14:43,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:43,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:43,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-03-10 21:14:43,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:43,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:43,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:43,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:43,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:43,871 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:43,892 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 21:14:43,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129618789] [2021-03-10 21:14:43,892 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:43,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460311137] [2021-03-10 21:14:43,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:43,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:43,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20862166] [2021-03-10 21:14:43,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:43,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:43,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:43,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:43,893 INFO L87 Difference]: Start difference. First operand 181 states and 454 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:44,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:44,050 INFO L93 Difference]: Finished difference Result 272 states and 668 transitions. [2021-03-10 21:14:44,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:44,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:44,051 INFO L225 Difference]: With dead ends: 272 [2021-03-10 21:14:44,051 INFO L226 Difference]: Without dead ends: 265 [2021-03-10 21:14:44,051 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:44,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-03-10 21:14:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 183. [2021-03-10 21:14:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.521978021978022) internal successors, (459), 182 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 459 transitions. [2021-03-10 21:14:44,053 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 459 transitions. Word has length 16 [2021-03-10 21:14:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:44,053 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 459 transitions. [2021-03-10 21:14:44,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 459 transitions. [2021-03-10 21:14:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:44,053 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:44,053 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:44,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:44,255 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:44,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:44,255 INFO L82 PathProgramCache]: Analyzing trace with hash -362194147, now seen corresponding path program 123 times [2021-03-10 21:14:44,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:44,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601910094] [2021-03-10 21:14:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:44,257 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:44,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075919468] [2021-03-10 21:14:44,257 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 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 21:14:44,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:44,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:44,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:44,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:44,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:44,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-03-10 21:14:44,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:44,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:44,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-03-10 21:14:44,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:44,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:44,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-03-10 21:14:44,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:44,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:44,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:44,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:44,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,414 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:44,435 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 21:14:44,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601910094] [2021-03-10 21:14:44,436 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:44,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075919468] [2021-03-10 21:14:44,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:44,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:44,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085369047] [2021-03-10 21:14:44,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:44,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:44,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:44,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:44,436 INFO L87 Difference]: Start difference. First operand 183 states and 459 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:44,588 INFO L93 Difference]: Finished difference Result 274 states and 674 transitions. [2021-03-10 21:14:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:44,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:44,589 INFO L225 Difference]: With dead ends: 274 [2021-03-10 21:14:44,589 INFO L226 Difference]: Without dead ends: 268 [2021-03-10 21:14:44,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-03-10 21:14:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 184. [2021-03-10 21:14:44,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.519125683060109) internal successors, (461), 183 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 461 transitions. [2021-03-10 21:14:44,592 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 461 transitions. Word has length 16 [2021-03-10 21:14:44,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:44,592 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 461 transitions. [2021-03-10 21:14:44,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 461 transitions. [2021-03-10 21:14:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:44,592 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:44,592 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:44,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:44,813 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:44,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1366853187, now seen corresponding path program 124 times [2021-03-10 21:14:44,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:44,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311586187] [2021-03-10 21:14:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:44,816 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:44,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614635692] [2021-03-10 21:14:44,816 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:44,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:44,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:44,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:44,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:44,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:44,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:44,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-03-10 21:14:44,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:44,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:44,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-03-10 21:14:44,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:44,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:44,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-03-10 21:14:44,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:44,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:44,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:44,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:44,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:44,994 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:45,018 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 21:14:45,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311586187] [2021-03-10 21:14:45,019 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:45,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614635692] [2021-03-10 21:14:45,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:45,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:45,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234468717] [2021-03-10 21:14:45,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:45,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:45,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:45,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:45,020 INFO L87 Difference]: Start difference. First operand 184 states and 461 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:45,211 INFO L93 Difference]: Finished difference Result 279 states and 688 transitions. [2021-03-10 21:14:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:45,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:45,212 INFO L225 Difference]: With dead ends: 279 [2021-03-10 21:14:45,212 INFO L226 Difference]: Without dead ends: 274 [2021-03-10 21:14:45,212 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-03-10 21:14:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 185. [2021-03-10 21:14:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.516304347826087) internal successors, (463), 184 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 463 transitions. [2021-03-10 21:14:45,215 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 463 transitions. Word has length 16 [2021-03-10 21:14:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:45,215 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 463 transitions. [2021-03-10 21:14:45,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:45,216 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 463 transitions. [2021-03-10 21:14:45,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:45,216 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:45,218 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:45,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:45,427 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:45,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:45,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1209770403, now seen corresponding path program 125 times [2021-03-10 21:14:45,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:45,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399230729] [2021-03-10 21:14:45,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:45,429 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:45,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36132717] [2021-03-10 21:14:45,429 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 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 21:14:45,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:45,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:45,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:45,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:45,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:45,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:45,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:45,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:45,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-03-10 21:14:45,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:45,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:45,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:45,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:45,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-03-10 21:14:45,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:45,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:45,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:45,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:45,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-03-10 21:14:45,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:14:45,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:45,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:45,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:14:45,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:45,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:45,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:45,577 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:45,610 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 21:14:45,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399230729] [2021-03-10 21:14:45,610 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:45,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36132717] [2021-03-10 21:14:45,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:45,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:45,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021287430] [2021-03-10 21:14:45,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:45,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:45,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:45,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:45,611 INFO L87 Difference]: Start difference. First operand 185 states and 463 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:45,795 INFO L93 Difference]: Finished difference Result 287 states and 710 transitions. [2021-03-10 21:14:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:45,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:45,796 INFO L225 Difference]: With dead ends: 287 [2021-03-10 21:14:45,796 INFO L226 Difference]: Without dead ends: 283 [2021-03-10 21:14:45,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-03-10 21:14:45,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 185. [2021-03-10 21:14:45,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.516304347826087) internal successors, (463), 184 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 463 transitions. [2021-03-10 21:14:45,800 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 463 transitions. Word has length 16 [2021-03-10 21:14:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:45,800 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 463 transitions. [2021-03-10 21:14:45,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 463 transitions. [2021-03-10 21:14:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:45,800 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:45,800 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:46,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:46,003 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:46,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1246121035, now seen corresponding path program 126 times [2021-03-10 21:14:46,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:46,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108390817] [2021-03-10 21:14:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:46,005 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:46,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898532785] [2021-03-10 21:14:46,005 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 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 21:14:46,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:46,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:46,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:46,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:46,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:46,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:46,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-03-10 21:14:46,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:46,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:46,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-03-10 21:14:46,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:46,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:46,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-03-10 21:14:46,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:46,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:46,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:46,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:46,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,167 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:46,188 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 21:14:46,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108390817] [2021-03-10 21:14:46,189 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:46,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898532785] [2021-03-10 21:14:46,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:46,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:46,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161114865] [2021-03-10 21:14:46,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:46,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:46,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:46,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:46,189 INFO L87 Difference]: Start difference. First operand 185 states and 463 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:46,333 INFO L93 Difference]: Finished difference Result 223 states and 557 transitions. [2021-03-10 21:14:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:46,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:46,334 INFO L225 Difference]: With dead ends: 223 [2021-03-10 21:14:46,334 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 21:14:46,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:46,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 21:14:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 187. [2021-03-10 21:14:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.521505376344086) internal successors, (469), 186 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 469 transitions. [2021-03-10 21:14:46,337 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 469 transitions. Word has length 16 [2021-03-10 21:14:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:46,338 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 469 transitions. [2021-03-10 21:14:46,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 469 transitions. [2021-03-10 21:14:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:46,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:46,338 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:46,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-03-10 21:14:46,551 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:46,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1319798927, now seen corresponding path program 127 times [2021-03-10 21:14:46,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:46,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364460983] [2021-03-10 21:14:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:46,553 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:46,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065425187] [2021-03-10 21:14:46,553 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 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 21:14:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:46,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:46,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:46,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:46,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:46,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:14:46,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:46,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:46,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-03-10 21:14:46,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:46,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:46,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-03-10 21:14:46,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:46,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:46,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:46,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:46,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:46,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:46,726 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 21:14:46,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364460983] [2021-03-10 21:14:46,726 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:46,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065425187] [2021-03-10 21:14:46,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:46,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:46,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697960834] [2021-03-10 21:14:46,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:46,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:46,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:46,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:46,727 INFO L87 Difference]: Start difference. First operand 187 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:46,876 INFO L93 Difference]: Finished difference Result 230 states and 574 transitions. [2021-03-10 21:14:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:46,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:46,877 INFO L225 Difference]: With dead ends: 230 [2021-03-10 21:14:46,877 INFO L226 Difference]: Without dead ends: 227 [2021-03-10 21:14:46,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-03-10 21:14:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 188. [2021-03-10 21:14:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5240641711229945) internal successors, (472), 187 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 472 transitions. [2021-03-10 21:14:46,879 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 472 transitions. Word has length 16 [2021-03-10 21:14:46,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:46,879 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 472 transitions. [2021-03-10 21:14:46,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 472 transitions. [2021-03-10 21:14:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:46,879 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:46,879 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:47,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:47,080 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:47,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:47,080 INFO L82 PathProgramCache]: Analyzing trace with hash 398544779, now seen corresponding path program 128 times [2021-03-10 21:14:47,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:47,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475041133] [2021-03-10 21:14:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:47,082 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:47,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518216774] [2021-03-10 21:14:47,082 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 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 21:14:47,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:47,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:47,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:47,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:47,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:47,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:47,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:14:47,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:47,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:47,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-03-10 21:14:47,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:47,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:47,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-03-10 21:14:47,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:14:47,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:47,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:14:47,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:47,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,220 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:47,253 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 21:14:47,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475041133] [2021-03-10 21:14:47,253 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:47,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518216774] [2021-03-10 21:14:47,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:47,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:47,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005348289] [2021-03-10 21:14:47,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:47,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:47,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:47,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:47,254 INFO L87 Difference]: Start difference. First operand 188 states and 472 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:47,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:47,400 INFO L93 Difference]: Finished difference Result 239 states and 598 transitions. [2021-03-10 21:14:47,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:47,400 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:47,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:47,401 INFO L225 Difference]: With dead ends: 239 [2021-03-10 21:14:47,401 INFO L226 Difference]: Without dead ends: 236 [2021-03-10 21:14:47,401 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-03-10 21:14:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 186. [2021-03-10 21:14:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.518918918918919) internal successors, (466), 185 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 466 transitions. [2021-03-10 21:14:47,403 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 466 transitions. Word has length 16 [2021-03-10 21:14:47,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:47,403 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 466 transitions. [2021-03-10 21:14:47,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 466 transitions. [2021-03-10 21:14:47,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:47,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:47,403 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:47,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-03-10 21:14:47,604 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:47,604 INFO L82 PathProgramCache]: Analyzing trace with hash -748344121, now seen corresponding path program 129 times [2021-03-10 21:14:47,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:47,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389427638] [2021-03-10 21:14:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:47,606 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:47,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609163113] [2021-03-10 21:14:47,606 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 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 21:14:47,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:47,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:47,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:47,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:47,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:47,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:47,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-03-10 21:14:47,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:47,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:47,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-03-10 21:14:47,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:47,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:47,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-03-10 21:14:47,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:47,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:47,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:47,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:47,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:47,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:47,797 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 21:14:47,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389427638] [2021-03-10 21:14:47,797 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:47,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609163113] [2021-03-10 21:14:47,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:47,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:47,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709688203] [2021-03-10 21:14:47,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:47,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:47,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:47,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:47,798 INFO L87 Difference]: Start difference. First operand 186 states and 466 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:47,973 INFO L93 Difference]: Finished difference Result 225 states and 565 transitions. [2021-03-10 21:14:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:47,974 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:47,974 INFO L225 Difference]: With dead ends: 225 [2021-03-10 21:14:47,974 INFO L226 Difference]: Without dead ends: 222 [2021-03-10 21:14:47,974 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-03-10 21:14:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 188. [2021-03-10 21:14:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5240641711229945) internal successors, (472), 187 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 472 transitions. [2021-03-10 21:14:47,976 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 472 transitions. Word has length 16 [2021-03-10 21:14:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:47,976 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 472 transitions. [2021-03-10 21:14:47,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 472 transitions. [2021-03-10 21:14:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:47,977 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:47,977 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:48,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-10 21:14:48,177 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:48,177 INFO L82 PathProgramCache]: Analyzing trace with hash 969999585, now seen corresponding path program 130 times [2021-03-10 21:14:48,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:48,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805782877] [2021-03-10 21:14:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:48,179 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:48,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480311679] [2021-03-10 21:14:48,179 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 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 21:14:48,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:48,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:48,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:48,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:48,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:48,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:14:48,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:48,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:48,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-03-10 21:14:48,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:48,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:48,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-03-10 21:14:48,312 INFO L446 ElimStorePlain]: Different costs {0=[v_A_128], 5=[F]} [2021-03-10 21:14:48,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:48,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:48,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:14:48,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:14:48,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:14:48,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 29 [2021-03-10 21:14:48,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:48,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,332 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:29 [2021-03-10 21:14:48,365 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 21:14:48,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805782877] [2021-03-10 21:14:48,365 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:48,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480311679] [2021-03-10 21:14:48,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:48,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:48,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622689345] [2021-03-10 21:14:48,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:48,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:48,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:48,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:48,366 INFO L87 Difference]: Start difference. First operand 188 states and 472 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:48,503 INFO L93 Difference]: Finished difference Result 235 states and 590 transitions. [2021-03-10 21:14:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:48,503 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:48,504 INFO L225 Difference]: With dead ends: 235 [2021-03-10 21:14:48,504 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:14:48,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:14:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 187. [2021-03-10 21:14:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.521505376344086) internal successors, (469), 186 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 469 transitions. [2021-03-10 21:14:48,506 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 469 transitions. Word has length 16 [2021-03-10 21:14:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:48,506 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 469 transitions. [2021-03-10 21:14:48,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 469 transitions. [2021-03-10 21:14:48,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:48,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:48,507 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:48,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-03-10 21:14:48,707 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:48,707 INFO L82 PathProgramCache]: Analyzing trace with hash 988433611, now seen corresponding path program 131 times [2021-03-10 21:14:48,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:48,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279832385] [2021-03-10 21:14:48,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:48,709 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:48,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222714035] [2021-03-10 21:14:48,709 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 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 21:14:48,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:48,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:48,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:48,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:48,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:48,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:48,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-03-10 21:14:48,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:48,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:48,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-03-10 21:14:48,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:48,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:48,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-03-10 21:14:48,820 INFO L446 ElimStorePlain]: Different costs {0=[v_A_130], 5=[F]} [2021-03-10 21:14:48,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:48,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:48,844 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:48,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:14:48,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:48,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:48,850 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:14:48,894 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 21:14:48,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279832385] [2021-03-10 21:14:48,894 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:48,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222714035] [2021-03-10 21:14:48,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:48,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:48,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932591176] [2021-03-10 21:14:48,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:48,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:48,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:48,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:48,895 INFO L87 Difference]: Start difference. First operand 187 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:49,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:49,029 INFO L93 Difference]: Finished difference Result 228 states and 574 transitions. [2021-03-10 21:14:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:49,029 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:49,029 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:14:49,029 INFO L226 Difference]: Without dead ends: 225 [2021-03-10 21:14:49,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-03-10 21:14:49,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 187. [2021-03-10 21:14:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.521505376344086) internal successors, (469), 186 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 469 transitions. [2021-03-10 21:14:49,032 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 469 transitions. Word has length 16 [2021-03-10 21:14:49,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:49,032 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 469 transitions. [2021-03-10 21:14:49,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 469 transitions. [2021-03-10 21:14:49,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:49,032 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:49,032 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:49,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:49,232 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:49,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:49,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2036153729, now seen corresponding path program 132 times [2021-03-10 21:14:49,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:49,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601504076] [2021-03-10 21:14:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:49,234 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:49,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798085582] [2021-03-10 21:14:49,234 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 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 21:14:49,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:49,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:49,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:49,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:49,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:49,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:49,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:14:49,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:49,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:49,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:49,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:49,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:49,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-03-10 21:14:49,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:49,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:49,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:49,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:49,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,387 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:49,409 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 21:14:49,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601504076] [2021-03-10 21:14:49,409 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:49,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798085582] [2021-03-10 21:14:49,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:49,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:49,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618434965] [2021-03-10 21:14:49,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:49,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:49,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:49,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:49,410 INFO L87 Difference]: Start difference. First operand 187 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:49,532 INFO L93 Difference]: Finished difference Result 213 states and 529 transitions. [2021-03-10 21:14:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:49,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:49,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:49,533 INFO L225 Difference]: With dead ends: 213 [2021-03-10 21:14:49,533 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 21:14:49,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 21:14:49,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2021-03-10 21:14:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.526595744680851) internal successors, (475), 188 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 475 transitions. [2021-03-10 21:14:49,535 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 475 transitions. Word has length 16 [2021-03-10 21:14:49,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:49,535 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 475 transitions. [2021-03-10 21:14:49,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:49,535 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 475 transitions. [2021-03-10 21:14:49,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:49,535 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:49,535 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:49,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-03-10 21:14:49,736 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:49,736 INFO L82 PathProgramCache]: Analyzing trace with hash -307106395, now seen corresponding path program 133 times [2021-03-10 21:14:49,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:49,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986222284] [2021-03-10 21:14:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:49,748 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:49,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236773437] [2021-03-10 21:14:49,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:49,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:49,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:49,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:49,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:14:49,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:49,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:49,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:49,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:49,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:49,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-03-10 21:14:49,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:49,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:49,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:49,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:49,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:49,905 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:49,926 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 21:14:49,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986222284] [2021-03-10 21:14:49,926 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:49,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236773437] [2021-03-10 21:14:49,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:49,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:49,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812237124] [2021-03-10 21:14:49,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:49,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:49,927 INFO L87 Difference]: Start difference. First operand 189 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:50,061 INFO L93 Difference]: Finished difference Result 220 states and 546 transitions. [2021-03-10 21:14:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:50,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:50,062 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:14:50,062 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:14:50,062 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:50,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:14:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 190. [2021-03-10 21:14:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.5291005291005293) internal successors, (478), 189 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 478 transitions. [2021-03-10 21:14:50,064 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 478 transitions. Word has length 16 [2021-03-10 21:14:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:50,064 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 478 transitions. [2021-03-10 21:14:50,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 478 transitions. [2021-03-10 21:14:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:50,065 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:50,065 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:50,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:50,265 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:50,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1411237311, now seen corresponding path program 134 times [2021-03-10 21:14:50,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:50,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924888932] [2021-03-10 21:14:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:50,267 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:50,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603226124] [2021-03-10 21:14:50,267 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:50,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:50,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:50,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:50,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:50,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:50,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:50,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-03-10 21:14:50,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:50,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:50,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:50,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:50,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:50,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-03-10 21:14:50,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:50,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:50,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:50,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:50,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,406 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:50,439 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 21:14:50,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924888932] [2021-03-10 21:14:50,439 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:50,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603226124] [2021-03-10 21:14:50,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:50,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:50,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678975617] [2021-03-10 21:14:50,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:50,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:50,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:50,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:50,440 INFO L87 Difference]: Start difference. First operand 190 states and 478 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:50,595 INFO L93 Difference]: Finished difference Result 229 states and 570 transitions. [2021-03-10 21:14:50,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:50,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:50,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:50,595 INFO L225 Difference]: With dead ends: 229 [2021-03-10 21:14:50,595 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 21:14:50,596 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 21:14:50,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 188. [2021-03-10 21:14:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5240641711229945) internal successors, (472), 187 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 472 transitions. [2021-03-10 21:14:50,598 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 472 transitions. Word has length 16 [2021-03-10 21:14:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:50,598 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 472 transitions. [2021-03-10 21:14:50,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 472 transitions. [2021-03-10 21:14:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:50,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:50,598 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:50,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:50,811 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:50,811 INFO L82 PathProgramCache]: Analyzing trace with hash 264348411, now seen corresponding path program 135 times [2021-03-10 21:14:50,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:50,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588149787] [2021-03-10 21:14:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:50,813 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:50,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440514404] [2021-03-10 21:14:50,813 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 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 21:14:50,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:50,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:50,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:50,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:50,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:50,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:50,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-03-10 21:14:50,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:50,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:50,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:50,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:50,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:50,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-03-10 21:14:50,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:50,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:50,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:50,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:50,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:50,979 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:51,001 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 21:14:51,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588149787] [2021-03-10 21:14:51,002 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:51,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440514404] [2021-03-10 21:14:51,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:51,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:51,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819002806] [2021-03-10 21:14:51,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:51,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:51,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:51,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:51,002 INFO L87 Difference]: Start difference. First operand 188 states and 472 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:51,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:51,136 INFO L93 Difference]: Finished difference Result 215 states and 537 transitions. [2021-03-10 21:14:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:51,136 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:51,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:51,137 INFO L225 Difference]: With dead ends: 215 [2021-03-10 21:14:51,137 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 21:14:51,137 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 21:14:51,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 190. [2021-03-10 21:14:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.5291005291005293) internal successors, (478), 189 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 478 transitions. [2021-03-10 21:14:51,139 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 478 transitions. Word has length 16 [2021-03-10 21:14:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:51,139 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 478 transitions. [2021-03-10 21:14:51,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 478 transitions. [2021-03-10 21:14:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:51,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:51,139 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:51,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:51,340 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:51,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1982692117, now seen corresponding path program 136 times [2021-03-10 21:14:51,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:51,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129199247] [2021-03-10 21:14:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:51,342 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:51,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034392695] [2021-03-10 21:14:51,342 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 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 21:14:51,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:51,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:51,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:51,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:51,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:51,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:51,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:14:51,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:51,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:51,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:51,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:51,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:51,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-03-10 21:14:51,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:14:51,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:51,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:14:51,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:51,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,489 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:51,547 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 21:14:51,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129199247] [2021-03-10 21:14:51,548 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:51,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034392695] [2021-03-10 21:14:51,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:51,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:51,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559925820] [2021-03-10 21:14:51,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:51,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:51,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:51,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:51,549 INFO L87 Difference]: Start difference. First operand 190 states and 478 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:51,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:51,685 INFO L93 Difference]: Finished difference Result 225 states and 562 transitions. [2021-03-10 21:14:51,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:51,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:51,686 INFO L225 Difference]: With dead ends: 225 [2021-03-10 21:14:51,686 INFO L226 Difference]: Without dead ends: 222 [2021-03-10 21:14:51,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:51,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-03-10 21:14:51,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 189. [2021-03-10 21:14:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.526595744680851) internal successors, (475), 188 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 475 transitions. [2021-03-10 21:14:51,688 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 475 transitions. Word has length 16 [2021-03-10 21:14:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:51,688 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 475 transitions. [2021-03-10 21:14:51,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 475 transitions. [2021-03-10 21:14:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:51,688 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:51,688 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:51,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:51,889 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:51,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:51,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2001126143, now seen corresponding path program 137 times [2021-03-10 21:14:51,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:51,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088328841] [2021-03-10 21:14:51,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:51,891 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:51,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9077759] [2021-03-10 21:14:51,891 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 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 21:14:51,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:51,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:51,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:51,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:51,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:51,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:51,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:14:51,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:51,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:51,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:51,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:51,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:51,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:51,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-03-10 21:14:52,003 INFO L446 ElimStorePlain]: Different costs {0=[v_A_142], 5=[F]} [2021-03-10 21:14:52,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:52,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:52,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:52,025 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:52,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:14:52,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:52,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:52,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:52,032 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:14:52,079 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 21:14:52,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088328841] [2021-03-10 21:14:52,080 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:52,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9077759] [2021-03-10 21:14:52,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:52,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:52,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614047481] [2021-03-10 21:14:52,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:52,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:52,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:52,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:52,081 INFO L87 Difference]: Start difference. First operand 189 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:52,216 INFO L93 Difference]: Finished difference Result 218 states and 546 transitions. [2021-03-10 21:14:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:52,217 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:52,217 INFO L225 Difference]: With dead ends: 218 [2021-03-10 21:14:52,217 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 21:14:52,218 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 21:14:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 187. [2021-03-10 21:14:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.521505376344086) internal successors, (469), 186 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 469 transitions. [2021-03-10 21:14:52,220 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 469 transitions. Word has length 16 [2021-03-10 21:14:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:52,220 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 469 transitions. [2021-03-10 21:14:52,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 469 transitions. [2021-03-10 21:14:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:52,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:52,220 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:52,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:52,420 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:52,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1662061529, now seen corresponding path program 138 times [2021-03-10 21:14:52,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:52,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239364878] [2021-03-10 21:14:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:52,422 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:52,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866660025] [2021-03-10 21:14:52,422 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 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 21:14:52,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:52,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:52,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:52,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:52,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239364878] [2021-03-10 21:14:52,525 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:52,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866660025] [2021-03-10 21:14:52,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:52,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:52,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709457242] [2021-03-10 21:14:52,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:52,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:52,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:52,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:52,526 INFO L87 Difference]: Start difference. First operand 187 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:52,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:52,691 INFO L93 Difference]: Finished difference Result 252 states and 626 transitions. [2021-03-10 21:14:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:52,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:52,692 INFO L225 Difference]: With dead ends: 252 [2021-03-10 21:14:52,692 INFO L226 Difference]: Without dead ends: 248 [2021-03-10 21:14:52,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-03-10 21:14:52,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 186. [2021-03-10 21:14:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.5243243243243243) internal successors, (467), 185 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 467 transitions. [2021-03-10 21:14:52,694 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 467 transitions. Word has length 16 [2021-03-10 21:14:52,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:52,695 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 467 transitions. [2021-03-10 21:14:52,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:52,695 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 467 transitions. [2021-03-10 21:14:52,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:52,695 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:52,695 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:52,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-10 21:14:52,895 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:52,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1884448125, now seen corresponding path program 139 times [2021-03-10 21:14:52,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:52,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855783706] [2021-03-10 21:14:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:52,897 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:52,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946412501] [2021-03-10 21:14:52,897 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 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 21:14:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:52,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:52,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:52,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:52,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:52,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:52,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:52,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:14:52,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:52,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:52,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:52,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:52,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-03-10 21:14:52,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:52,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:52,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:52,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:52,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:14:53,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:53,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:53,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:53,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:53,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:53,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:53,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:53,070 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:53,092 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 21:14:53,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855783706] [2021-03-10 21:14:53,092 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:53,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946412501] [2021-03-10 21:14:53,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:53,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:53,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737810990] [2021-03-10 21:14:53,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:53,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:53,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:53,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:53,093 INFO L87 Difference]: Start difference. First operand 186 states and 467 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:53,261 INFO L93 Difference]: Finished difference Result 223 states and 555 transitions. [2021-03-10 21:14:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:53,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:53,262 INFO L225 Difference]: With dead ends: 223 [2021-03-10 21:14:53,262 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 21:14:53,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 21:14:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 188. [2021-03-10 21:14:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5401069518716577) internal successors, (475), 187 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 475 transitions. [2021-03-10 21:14:53,265 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 475 transitions. Word has length 16 [2021-03-10 21:14:53,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:53,265 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 475 transitions. [2021-03-10 21:14:53,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 475 transitions. [2021-03-10 21:14:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:53,265 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:53,265 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:53,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-03-10 21:14:53,482 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:53,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:53,482 INFO L82 PathProgramCache]: Analyzing trace with hash -166104419, now seen corresponding path program 140 times [2021-03-10 21:14:53,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:53,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487578493] [2021-03-10 21:14:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:53,483 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:53,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564645522] [2021-03-10 21:14:53,483 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 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 21:14:53,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:53,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:53,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:53,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:53,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:53,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:53,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:53,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-03-10 21:14:53,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:53,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:53,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:53,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:53,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-03-10 21:14:53,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:53,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:53,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:53,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:53,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-03-10 21:14:53,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:14:53,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:53,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:53,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:14:53,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:53,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:53,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:53,628 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:53,661 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 21:14:53,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487578493] [2021-03-10 21:14:53,662 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:53,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564645522] [2021-03-10 21:14:53,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:53,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:53,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178959416] [2021-03-10 21:14:53,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:53,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:53,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:53,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:53,662 INFO L87 Difference]: Start difference. First operand 188 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:53,827 INFO L93 Difference]: Finished difference Result 233 states and 580 transitions. [2021-03-10 21:14:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:53,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:53,828 INFO L225 Difference]: With dead ends: 233 [2021-03-10 21:14:53,828 INFO L226 Difference]: Without dead ends: 230 [2021-03-10 21:14:53,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-03-10 21:14:53,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2021-03-10 21:14:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5401069518716577) internal successors, (475), 187 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 475 transitions. [2021-03-10 21:14:53,831 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 475 transitions. Word has length 16 [2021-03-10 21:14:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:53,831 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 475 transitions. [2021-03-10 21:14:53,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 475 transitions. [2021-03-10 21:14:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:53,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:53,831 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:54,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 21:14:54,031 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:54,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:54,032 INFO L82 PathProgramCache]: Analyzing trace with hash -147670393, now seen corresponding path program 141 times [2021-03-10 21:14:54,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:54,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241356613] [2021-03-10 21:14:54,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:54,033 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:54,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385693122] [2021-03-10 21:14:54,033 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 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 21:14:54,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:54,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:54,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:54,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:54,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:54,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:54,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-03-10 21:14:54,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:54,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:54,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-03-10 21:14:54,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:54,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:54,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:14:54,152 INFO L446 ElimStorePlain]: Different costs {0=[v_A_148], 5=[F]} [2021-03-10 21:14:54,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:54,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:54,175 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:54,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:14:54,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:54,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,182 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:14:54,229 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 21:14:54,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241356613] [2021-03-10 21:14:54,229 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:54,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385693122] [2021-03-10 21:14:54,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:54,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:54,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080118621] [2021-03-10 21:14:54,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:54,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:54,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:54,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:54,230 INFO L87 Difference]: Start difference. First operand 188 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:54,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:54,369 INFO L93 Difference]: Finished difference Result 221 states and 556 transitions. [2021-03-10 21:14:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:54,369 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:54,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:54,370 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:14:54,370 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 21:14:54,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:54,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 21:14:54,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 188. [2021-03-10 21:14:54,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5401069518716577) internal successors, (475), 187 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 475 transitions. [2021-03-10 21:14:54,372 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 475 transitions. Word has length 16 [2021-03-10 21:14:54,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:54,372 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 475 transitions. [2021-03-10 21:14:54,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:54,372 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 475 transitions. [2021-03-10 21:14:54,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:54,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:54,372 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:54,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-03-10 21:14:54,575 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:54,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1168486911, now seen corresponding path program 142 times [2021-03-10 21:14:54,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:54,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229817468] [2021-03-10 21:14:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:54,577 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:54,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105061723] [2021-03-10 21:14:54,577 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 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 21:14:54,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:54,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:54,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:54,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:54,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:54,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:54,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-03-10 21:14:54,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:54,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:54,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-03-10 21:14:54,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:54,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:54,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-03-10 21:14:54,706 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:54,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:14:54,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:54,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:14:54,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:54,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:54,722 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:14:54,772 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 21:14:54,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229817468] [2021-03-10 21:14:54,772 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:54,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105061723] [2021-03-10 21:14:54,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:54,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:54,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098586100] [2021-03-10 21:14:54,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:54,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:54,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:54,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:54,773 INFO L87 Difference]: Start difference. First operand 188 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:54,892 INFO L93 Difference]: Finished difference Result 221 states and 556 transitions. [2021-03-10 21:14:54,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:54,893 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:54,893 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:14:54,893 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 21:14:54,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 21:14:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 188. [2021-03-10 21:14:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5401069518716577) internal successors, (475), 187 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 475 transitions. [2021-03-10 21:14:54,898 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 475 transitions. Word has length 16 [2021-03-10 21:14:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:54,898 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 475 transitions. [2021-03-10 21:14:54,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:54,898 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 475 transitions. [2021-03-10 21:14:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:54,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:54,898 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:55,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:55,099 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:55,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:55,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1050402431, now seen corresponding path program 143 times [2021-03-10 21:14:55,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:55,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400253927] [2021-03-10 21:14:55,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:55,101 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:55,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44104260] [2021-03-10 21:14:55,101 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 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 21:14:55,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:55,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:55,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:14:55,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:55,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400253927] [2021-03-10 21:14:55,214 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:55,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44104260] [2021-03-10 21:14:55,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:55,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:55,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098205903] [2021-03-10 21:14:55,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:55,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:55,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:55,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:55,214 INFO L87 Difference]: Start difference. First operand 188 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:55,388 INFO L93 Difference]: Finished difference Result 231 states and 575 transitions. [2021-03-10 21:14:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:14:55,388 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:55,389 INFO L225 Difference]: With dead ends: 231 [2021-03-10 21:14:55,389 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 21:14:55,389 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 21:14:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 187. [2021-03-10 21:14:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.532258064516129) internal successors, (471), 186 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 471 transitions. [2021-03-10 21:14:55,392 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 471 transitions. Word has length 16 [2021-03-10 21:14:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:55,392 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 471 transitions. [2021-03-10 21:14:55,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,392 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 471 transitions. [2021-03-10 21:14:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:55,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:55,392 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:55,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-03-10 21:14:55,593 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:55,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:55,593 INFO L82 PathProgramCache]: Analyzing trace with hash -707456309, now seen corresponding path program 144 times [2021-03-10 21:14:55,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:55,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545617242] [2021-03-10 21:14:55,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:55,594 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:55,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270313275] [2021-03-10 21:14:55,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:14:55,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:55,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:55,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:55,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:55,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:14:55,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:55,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:55,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:55,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:14:55,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:55,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:55,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:55,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:55,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:55,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:55,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:55,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:55,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:55,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-03-10 21:14:55,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:14:55,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:55,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:55,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:14:55,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:55,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:55,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:55,748 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:55,769 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 21:14:55,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545617242] [2021-03-10 21:14:55,769 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:55,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270313275] [2021-03-10 21:14:55,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:55,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:55,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938791575] [2021-03-10 21:14:55,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:55,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:55,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:55,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:55,770 INFO L87 Difference]: Start difference. First operand 187 states and 471 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:55,890 INFO L93 Difference]: Finished difference Result 207 states and 517 transitions. [2021-03-10 21:14:55,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:55,890 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:55,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:55,890 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:14:55,891 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:14:55,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:14:55,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 189. [2021-03-10 21:14:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.5372340425531914) internal successors, (477), 188 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 477 transitions. [2021-03-10 21:14:55,893 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 477 transitions. Word has length 16 [2021-03-10 21:14:55,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:55,893 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 477 transitions. [2021-03-10 21:14:55,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,893 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 477 transitions. [2021-03-10 21:14:55,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:55,893 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:55,893 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:56,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:56,107 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:56,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1021591025, now seen corresponding path program 145 times [2021-03-10 21:14:56,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:56,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895843961] [2021-03-10 21:14:56,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:56,109 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:56,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207337808] [2021-03-10 21:14:56,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:56,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:56,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:56,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:56,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:56,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:14:56,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:56,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:56,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:56,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:56,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:56,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-03-10 21:14:56,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:56,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:56,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:56,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:56,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,279 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:56,302 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 21:14:56,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895843961] [2021-03-10 21:14:56,302 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:56,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207337808] [2021-03-10 21:14:56,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:56,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:56,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339281523] [2021-03-10 21:14:56,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:56,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:56,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:56,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:56,303 INFO L87 Difference]: Start difference. First operand 189 states and 477 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:56,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:56,479 INFO L93 Difference]: Finished difference Result 226 states and 563 transitions. [2021-03-10 21:14:56,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:56,480 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:56,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:56,480 INFO L225 Difference]: With dead ends: 226 [2021-03-10 21:14:56,480 INFO L226 Difference]: Without dead ends: 223 [2021-03-10 21:14:56,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-03-10 21:14:56,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 190. [2021-03-10 21:14:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.544973544973545) internal successors, (481), 189 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 481 transitions. [2021-03-10 21:14:56,483 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 481 transitions. Word has length 16 [2021-03-10 21:14:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:56,483 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 481 transitions. [2021-03-10 21:14:56,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 481 transitions. [2021-03-10 21:14:56,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:56,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:56,483 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:56,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:56,695 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:56,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1555032565, now seen corresponding path program 146 times [2021-03-10 21:14:56,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:56,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084404497] [2021-03-10 21:14:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:56,697 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:56,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703559820] [2021-03-10 21:14:56,697 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 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 21:14:56,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:56,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:56,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:56,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:56,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:56,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:56,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:14:56,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:56,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:56,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:56,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:56,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:56,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-03-10 21:14:56,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:56,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:56,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:56,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:56,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:56,845 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:56,879 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 21:14:56,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084404497] [2021-03-10 21:14:56,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:56,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703559820] [2021-03-10 21:14:56,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:56,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:56,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883730021] [2021-03-10 21:14:56,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:56,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:56,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:56,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:56,880 INFO L87 Difference]: Start difference. First operand 190 states and 481 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:57,021 INFO L93 Difference]: Finished difference Result 235 states and 587 transitions. [2021-03-10 21:14:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:57,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:57,022 INFO L225 Difference]: With dead ends: 235 [2021-03-10 21:14:57,022 INFO L226 Difference]: Without dead ends: 232 [2021-03-10 21:14:57,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-03-10 21:14:57,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 189. [2021-03-10 21:14:57,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.5372340425531914) internal successors, (477), 188 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 477 transitions. [2021-03-10 21:14:57,024 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 477 transitions. Word has length 16 [2021-03-10 21:14:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:57,024 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 477 transitions. [2021-03-10 21:14:57,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 477 transitions. [2021-03-10 21:14:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:57,024 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:57,024 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:57,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-03-10 21:14:57,225 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:57,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1593045831, now seen corresponding path program 147 times [2021-03-10 21:14:57,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:57,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250668385] [2021-03-10 21:14:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:57,227 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:57,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654629914] [2021-03-10 21:14:57,227 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 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 21:14:57,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:57,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:57,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:57,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:57,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:57,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:57,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:14:57,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:57,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:57,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:57,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:57,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:57,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-03-10 21:14:57,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:57,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:57,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:57,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:57,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,388 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:57,409 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 21:14:57,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250668385] [2021-03-10 21:14:57,409 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:57,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654629914] [2021-03-10 21:14:57,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:57,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:57,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583210044] [2021-03-10 21:14:57,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:57,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:57,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:57,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:57,410 INFO L87 Difference]: Start difference. First operand 189 states and 477 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:57,549 INFO L93 Difference]: Finished difference Result 217 states and 541 transitions. [2021-03-10 21:14:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:57,549 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:57,549 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:14:57,550 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 21:14:57,550 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 21:14:57,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 191. [2021-03-10 21:14:57,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.5526315789473686) internal successors, (485), 190 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 485 transitions. [2021-03-10 21:14:57,553 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 485 transitions. Word has length 16 [2021-03-10 21:14:57,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:57,553 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 485 transitions. [2021-03-10 21:14:57,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,553 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 485 transitions. [2021-03-10 21:14:57,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:57,553 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:57,553 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:57,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:57,774 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:57,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:57,774 INFO L82 PathProgramCache]: Analyzing trace with hash -983577759, now seen corresponding path program 148 times [2021-03-10 21:14:57,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:57,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212385083] [2021-03-10 21:14:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:57,775 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:57,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015742085] [2021-03-10 21:14:57,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:14:57,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:57,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:57,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:57,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:57,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:57,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:57,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:14:57,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:57,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:57,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:57,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:57,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:57,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-03-10 21:14:57,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:14:57,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:57,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:14:57,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:57,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:57,917 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:57,950 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 21:14:57,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212385083] [2021-03-10 21:14:57,950 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:57,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015742085] [2021-03-10 21:14:57,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:57,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:57,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148535871] [2021-03-10 21:14:57,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:57,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:57,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:57,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:57,951 INFO L87 Difference]: Start difference. First operand 191 states and 485 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:58,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:58,080 INFO L93 Difference]: Finished difference Result 227 states and 566 transitions. [2021-03-10 21:14:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:58,080 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:58,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:58,081 INFO L225 Difference]: With dead ends: 227 [2021-03-10 21:14:58,081 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 21:14:58,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 21:14:58,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 190. [2021-03-10 21:14:58,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.544973544973545) internal successors, (481), 189 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 481 transitions. [2021-03-10 21:14:58,084 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 481 transitions. Word has length 16 [2021-03-10 21:14:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:58,085 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 481 transitions. [2021-03-10 21:14:58,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 481 transitions. [2021-03-10 21:14:58,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:58,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:58,085 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:58,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-10 21:14:58,307 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:58,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:58,307 INFO L82 PathProgramCache]: Analyzing trace with hash -965143733, now seen corresponding path program 149 times [2021-03-10 21:14:58,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:58,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498632949] [2021-03-10 21:14:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:58,308 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:58,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778939304] [2021-03-10 21:14:58,309 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 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 21:14:58,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:58,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:58,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:58,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:58,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:58,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:58,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:14:58,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:58,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:58,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:14:58,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:58,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:58,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-03-10 21:14:58,427 INFO L446 ElimStorePlain]: Different costs {0=[v_A_162], 5=[F]} [2021-03-10 21:14:58,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:58,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:58,457 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:14:58,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:14:58,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:58,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,464 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:14:58,511 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 21:14:58,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498632949] [2021-03-10 21:14:58,511 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:58,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778939304] [2021-03-10 21:14:58,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:58,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:58,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812667561] [2021-03-10 21:14:58,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:58,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:58,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:58,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:58,512 INFO L87 Difference]: Start difference. First operand 190 states and 481 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:58,660 INFO L93 Difference]: Finished difference Result 214 states and 538 transitions. [2021-03-10 21:14:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:58,660 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:58,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:58,660 INFO L225 Difference]: With dead ends: 214 [2021-03-10 21:14:58,660 INFO L226 Difference]: Without dead ends: 211 [2021-03-10 21:14:58,661 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-10 21:14:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 190. [2021-03-10 21:14:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.544973544973545) internal successors, (481), 189 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:58,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 481 transitions. [2021-03-10 21:14:58,663 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 481 transitions. Word has length 16 [2021-03-10 21:14:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:58,663 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 481 transitions. [2021-03-10 21:14:58,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:58,663 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 481 transitions. [2021-03-10 21:14:58,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:58,663 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:58,663 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:58,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-03-10 21:14:58,864 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:58,864 INFO L82 PathProgramCache]: Analyzing trace with hash -555750705, now seen corresponding path program 150 times [2021-03-10 21:14:58,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:58,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499456643] [2021-03-10 21:14:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:58,865 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:58,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825555131] [2021-03-10 21:14:58,865 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 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 21:14:58,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:58,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:58,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:58,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:58,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:58,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:58,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:14:58,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:14:58,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:58,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-03-10 21:14:58,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:58,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:58,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:58,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:14:59,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:59,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:59,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:59,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:14:59,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:59,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:59,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:59,025 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:14:59,045 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 21:14:59,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499456643] [2021-03-10 21:14:59,046 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:59,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825555131] [2021-03-10 21:14:59,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:59,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:59,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143038175] [2021-03-10 21:14:59,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:59,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:59,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:59,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:59,046 INFO L87 Difference]: Start difference. First operand 190 states and 481 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:59,182 INFO L93 Difference]: Finished difference Result 220 states and 548 transitions. [2021-03-10 21:14:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:59,182 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:59,182 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:14:59,182 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:14:59,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:14:59,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2021-03-10 21:14:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.56020942408377) internal successors, (489), 191 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 489 transitions. [2021-03-10 21:14:59,184 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 489 transitions. Word has length 16 [2021-03-10 21:14:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:59,185 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 489 transitions. [2021-03-10 21:14:59,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 489 transitions. [2021-03-10 21:14:59,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:59,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:59,185 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:59,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-03-10 21:14:59,385 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:59,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:59,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1162593001, now seen corresponding path program 151 times [2021-03-10 21:14:59,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:59,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103876995] [2021-03-10 21:14:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:59,387 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:59,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883056876] [2021-03-10 21:14:59,387 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 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 21:14:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:59,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:59,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:59,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:14:59,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:59,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:59,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:59,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:14:59,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:14:59,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:59,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:59,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:59,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-03-10 21:14:59,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:14:59,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:59,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:59,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:59,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-03-10 21:14:59,538 INFO L446 ElimStorePlain]: Different costs {0=[v_A_166], 5=[F]} [2021-03-10 21:14:59,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:14:59,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:59,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:59,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:14:59,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:14:59,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:14:59,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 29 [2021-03-10 21:14:59,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:59,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:14:59,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:59,558 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:29 [2021-03-10 21:14:59,591 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 21:14:59,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103876995] [2021-03-10 21:14:59,591 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:14:59,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883056876] [2021-03-10 21:14:59,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:14:59,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:14:59,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285437590] [2021-03-10 21:14:59,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:59,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:59,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:59,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:59,592 INFO L87 Difference]: Start difference. First operand 192 states and 489 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:59,760 INFO L93 Difference]: Finished difference Result 230 states and 573 transitions. [2021-03-10 21:14:59,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:59,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:14:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:59,761 INFO L225 Difference]: With dead ends: 230 [2021-03-10 21:14:59,761 INFO L226 Difference]: Without dead ends: 227 [2021-03-10 21:14:59,761 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:59,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-03-10 21:14:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 191. [2021-03-10 21:14:59,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.5526315789473686) internal successors, (485), 190 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 485 transitions. [2021-03-10 21:14:59,763 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 485 transitions. Word has length 16 [2021-03-10 21:14:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:59,763 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 485 transitions. [2021-03-10 21:14:59,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 485 transitions. [2021-03-10 21:14:59,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:14:59,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:59,763 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:59,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-03-10 21:14:59,964 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:59,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:59,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1181027027, now seen corresponding path program 152 times [2021-03-10 21:14:59,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:59,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34926095] [2021-03-10 21:14:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:59,965 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:14:59,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434018992] [2021-03-10 21:14:59,965 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 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 21:14:59,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:59,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:59,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:14:59,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:00,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:00,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:00,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:15:00,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:00,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:00,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-03-10 21:15:00,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:00,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:00,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:15:00,080 INFO L446 ElimStorePlain]: Different costs {0=[v_A_168], 5=[F]} [2021-03-10 21:15:00,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:00,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:00,102 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:00,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:15:00,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:00,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,108 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:15:00,167 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 21:15:00,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34926095] [2021-03-10 21:15:00,167 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:00,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434018992] [2021-03-10 21:15:00,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:00,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:00,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220959087] [2021-03-10 21:15:00,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:00,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:00,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:00,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:00,168 INFO L87 Difference]: Start difference. First operand 191 states and 485 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:00,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:00,322 INFO L93 Difference]: Finished difference Result 217 states and 545 transitions. [2021-03-10 21:15:00,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:00,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:00,323 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:15:00,323 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 21:15:00,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 21:15:00,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 190. [2021-03-10 21:15:00,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.544973544973545) internal successors, (481), 189 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 481 transitions. [2021-03-10 21:15:00,325 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 481 transitions. Word has length 16 [2021-03-10 21:15:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:00,325 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 481 transitions. [2021-03-10 21:15:00,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 481 transitions. [2021-03-10 21:15:00,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:00,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:00,325 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:00,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:00,526 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:00,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:00,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1797782965, now seen corresponding path program 153 times [2021-03-10 21:15:00,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:00,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619874642] [2021-03-10 21:15:00,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:00,527 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:00,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663621290] [2021-03-10 21:15:00,528 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 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 21:15:00,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:15:00,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:00,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:00,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:00,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:00,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:00,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:15:00,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:00,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:00,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-03-10 21:15:00,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:00,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:00,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-03-10 21:15:00,646 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:00,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:15:00,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:00,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:15:00,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:00,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:00,663 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:15:00,709 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 21:15:00,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619874642] [2021-03-10 21:15:00,709 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:00,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663621290] [2021-03-10 21:15:00,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:00,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:00,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302064925] [2021-03-10 21:15:00,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:00,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:00,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:00,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:00,710 INFO L87 Difference]: Start difference. First operand 190 states and 481 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:00,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:00,855 INFO L93 Difference]: Finished difference Result 217 states and 547 transitions. [2021-03-10 21:15:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:00,855 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:00,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:00,856 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:15:00,856 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 21:15:00,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:00,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 21:15:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 190. [2021-03-10 21:15:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.544973544973545) internal successors, (481), 189 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:00,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 481 transitions. [2021-03-10 21:15:00,858 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 481 transitions. Word has length 16 [2021-03-10 21:15:00,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:00,858 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 481 transitions. [2021-03-10 21:15:00,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:00,858 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 481 transitions. [2021-03-10 21:15:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:00,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:00,858 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:01,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:01,059 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:01,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:01,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1551033415, now seen corresponding path program 154 times [2021-03-10 21:15:01,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:01,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619453502] [2021-03-10 21:15:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:01,066 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:01,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135663715] [2021-03-10 21:15:01,066 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 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 21:15:01,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:01,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:01,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:01,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:01,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:15:01,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:01,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-03-10 21:15:01,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:01,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:01,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-03-10 21:15:01,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:01,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:01,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-03-10 21:15:01,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:15:01,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:01,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:15:01,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:01,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,242 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:15:01,264 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 21:15:01,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619453502] [2021-03-10 21:15:01,264 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:01,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135663715] [2021-03-10 21:15:01,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:01,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:01,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628172430] [2021-03-10 21:15:01,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:01,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:01,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:01,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:01,265 INFO L87 Difference]: Start difference. First operand 190 states and 481 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:01,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:01,424 INFO L93 Difference]: Finished difference Result 220 states and 552 transitions. [2021-03-10 21:15:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:01,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:01,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:01,425 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:15:01,425 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:15:01,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:15:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2021-03-10 21:15:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.56020942408377) internal successors, (489), 191 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 489 transitions. [2021-03-10 21:15:01,427 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 489 transitions. Word has length 16 [2021-03-10 21:15:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:01,427 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 489 transitions. [2021-03-10 21:15:01,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:01,427 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 489 transitions. [2021-03-10 21:15:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:01,428 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:01,428 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:01,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:01,628 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:01,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:01,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1025590175, now seen corresponding path program 155 times [2021-03-10 21:15:01,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:01,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52021964] [2021-03-10 21:15:01,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:01,630 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:01,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183401272] [2021-03-10 21:15:01,630 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 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 21:15:01,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:15:01,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:01,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:01,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:01,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:15:01,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:01,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-03-10 21:15:01,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:01,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:01,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-03-10 21:15:01,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:01,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:01,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-03-10 21:15:01,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:15:01,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:01,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:15:01,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:01,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:01,770 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:15:01,802 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 21:15:01,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52021964] [2021-03-10 21:15:01,802 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:01,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183401272] [2021-03-10 21:15:01,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:01,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:01,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874215913] [2021-03-10 21:15:01,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:01,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:01,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:01,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:01,803 INFO L87 Difference]: Start difference. First operand 192 states and 489 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:01,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:01,958 INFO L93 Difference]: Finished difference Result 230 states and 577 transitions. [2021-03-10 21:15:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:01,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:01,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:01,959 INFO L225 Difference]: With dead ends: 230 [2021-03-10 21:15:01,959 INFO L226 Difference]: Without dead ends: 227 [2021-03-10 21:15:01,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-03-10 21:15:01,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 191. [2021-03-10 21:15:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.5526315789473686) internal successors, (485), 190 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 485 transitions. [2021-03-10 21:15:01,961 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 485 transitions. Word has length 16 [2021-03-10 21:15:01,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:01,961 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 485 transitions. [2021-03-10 21:15:01,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:01,962 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 485 transitions. [2021-03-10 21:15:01,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:01,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:01,962 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:02,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:02,162 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:02,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1007156149, now seen corresponding path program 156 times [2021-03-10 21:15:02,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:02,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668614098] [2021-03-10 21:15:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:02,165 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:02,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320540970] [2021-03-10 21:15:02,165 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 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 21:15:02,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:15:02,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:02,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:02,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:02,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:02,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:02,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:15:02,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:02,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:02,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-03-10 21:15:02,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:02,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:02,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:15:02,298 INFO L446 ElimStorePlain]: Different costs {0=[v_A_176], 5=[F]} [2021-03-10 21:15:02,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:02,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:02,324 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:02,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:15:02,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:02,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,332 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:15:02,384 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 21:15:02,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668614098] [2021-03-10 21:15:02,385 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:02,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320540970] [2021-03-10 21:15:02,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:02,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:02,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715332179] [2021-03-10 21:15:02,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:02,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:02,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:02,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:02,385 INFO L87 Difference]: Start difference. First operand 191 states and 485 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:02,526 INFO L93 Difference]: Finished difference Result 217 states and 549 transitions. [2021-03-10 21:15:02,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:02,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:02,527 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:15:02,527 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 21:15:02,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 21:15:02,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 190. [2021-03-10 21:15:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.544973544973545) internal successors, (481), 189 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 481 transitions. [2021-03-10 21:15:02,530 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 481 transitions. Word has length 16 [2021-03-10 21:15:02,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:02,530 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 481 transitions. [2021-03-10 21:15:02,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:02,530 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 481 transitions. [2021-03-10 21:15:02,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:02,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:02,530 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:02,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:02,731 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:02,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:02,731 INFO L82 PathProgramCache]: Analyzing trace with hash 309001155, now seen corresponding path program 157 times [2021-03-10 21:15:02,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:02,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628494985] [2021-03-10 21:15:02,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:02,733 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:02,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483603758] [2021-03-10 21:15:02,733 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 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 21:15:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:02,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:02,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:02,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:02,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:02,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:15:02,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:02,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:02,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-03-10 21:15:02,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:02,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:02,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-03-10 21:15:02,864 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:02,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:15:02,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:02,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:15:02,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:02,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:02,880 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:15:02,927 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 21:15:02,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628494985] [2021-03-10 21:15:02,928 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:02,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483603758] [2021-03-10 21:15:02,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:02,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:02,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028663530] [2021-03-10 21:15:02,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:02,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:02,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:02,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:02,928 INFO L87 Difference]: Start difference. First operand 190 states and 481 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:03,081 INFO L93 Difference]: Finished difference Result 217 states and 549 transitions. [2021-03-10 21:15:03,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:03,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:03,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:03,082 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:15:03,082 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 21:15:03,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 21:15:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2021-03-10 21:15:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.5372340425531914) internal successors, (477), 188 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 477 transitions. [2021-03-10 21:15:03,084 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 477 transitions. Word has length 16 [2021-03-10 21:15:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:03,084 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 477 transitions. [2021-03-10 21:15:03,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:03,084 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 477 transitions. [2021-03-10 21:15:03,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:03,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:03,085 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:03,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:03,285 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:03,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1825134125, now seen corresponding path program 158 times [2021-03-10 21:15:03,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:03,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725647075] [2021-03-10 21:15:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:03,287 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:03,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986990411] [2021-03-10 21:15:03,287 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 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 21:15:03,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:03,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:03,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:15:03,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:03,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725647075] [2021-03-10 21:15:03,415 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:03,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986990411] [2021-03-10 21:15:03,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:03,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-03-10 21:15:03,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721978533] [2021-03-10 21:15:03,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:03,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:03,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:03,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:03,416 INFO L87 Difference]: Start difference. First operand 189 states and 477 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:03,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:03,565 INFO L93 Difference]: Finished difference Result 207 states and 516 transitions. [2021-03-10 21:15:03,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:15:03,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:03,567 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:15:03,567 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:15:03,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:15:03,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:15:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 183. [2021-03-10 21:15:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5494505494505493) internal successors, (464), 182 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2021-03-10 21:15:03,570 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 16 [2021-03-10 21:15:03,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:03,570 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2021-03-10 21:15:03,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2021-03-10 21:15:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:03,571 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:03,571 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:03,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:03,790 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:03,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:03,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1839795381, now seen corresponding path program 159 times [2021-03-10 21:15:03,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:03,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750753365] [2021-03-10 21:15:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:03,792 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:03,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412956421] [2021-03-10 21:15:03,792 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 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 21:15:03,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:15:03,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:03,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:03,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:03,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:03,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:03,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:03,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:03,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:15:03,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:03,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:03,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:03,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:03,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-03-10 21:15:03,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:03,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:03,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:03,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:03,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-03-10 21:15:03,911 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:03,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:15:03,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:03,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:03,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:15:03,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:03,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:03,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:03,926 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:15:03,976 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 21:15:03,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750753365] [2021-03-10 21:15:03,976 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:03,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412956421] [2021-03-10 21:15:03,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:03,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:03,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795540769] [2021-03-10 21:15:03,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:03,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:03,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:03,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:03,977 INFO L87 Difference]: Start difference. First operand 183 states and 464 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:04,104 INFO L93 Difference]: Finished difference Result 211 states and 531 transitions. [2021-03-10 21:15:04,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:04,104 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:04,105 INFO L225 Difference]: With dead ends: 211 [2021-03-10 21:15:04,105 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 21:15:04,105 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 21:15:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 183. [2021-03-10 21:15:04,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5494505494505493) internal successors, (464), 182 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:04,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2021-03-10 21:15:04,107 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 16 [2021-03-10 21:15:04,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:04,107 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2021-03-10 21:15:04,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:04,107 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2021-03-10 21:15:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:04,107 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:04,107 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:04,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 21:15:04,311 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:04,311 INFO L82 PathProgramCache]: Analyzing trace with hash 982486595, now seen corresponding path program 160 times [2021-03-10 21:15:04,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:04,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039271783] [2021-03-10 21:15:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:04,313 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:04,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738301226] [2021-03-10 21:15:04,313 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 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 21:15:04,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:04,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:04,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:04,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:04,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:04,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:04,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:15:04,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:04,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:04,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:15:04,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:15:04,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:04,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-03-10 21:15:04,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:15:04,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:04,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:15:04,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:04,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,466 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:15:04,488 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 21:15:04,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039271783] [2021-03-10 21:15:04,488 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:04,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738301226] [2021-03-10 21:15:04,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:04,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:04,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632041605] [2021-03-10 21:15:04,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:04,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:04,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:04,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:04,489 INFO L87 Difference]: Start difference. First operand 183 states and 464 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:04,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:04,625 INFO L93 Difference]: Finished difference Result 202 states and 508 transitions. [2021-03-10 21:15:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:04,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:04,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:04,625 INFO L225 Difference]: With dead ends: 202 [2021-03-10 21:15:04,626 INFO L226 Difference]: Without dead ends: 199 [2021-03-10 21:15:04,626 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-03-10 21:15:04,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 185. [2021-03-10 21:15:04,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5543478260869565) internal successors, (470), 184 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 470 transitions. [2021-03-10 21:15:04,627 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 470 transitions. Word has length 16 [2021-03-10 21:15:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:04,628 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 470 transitions. [2021-03-10 21:15:04,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 470 transitions. [2021-03-10 21:15:04,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:04,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:04,628 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:04,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-03-10 21:15:04,828 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:04,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1583433367, now seen corresponding path program 161 times [2021-03-10 21:15:04,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:04,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174576238] [2021-03-10 21:15:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:04,830 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:04,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641695517] [2021-03-10 21:15:04,830 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 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 21:15:04,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:15:04,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:04,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:04,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:04,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:04,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:04,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:15:04,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:04,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:04,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:15:04,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:15:04,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:04,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-03-10 21:15:04,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:15:04,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:04,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:15:04,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:04,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:04,990 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:15:05,012 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 21:15:05,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174576238] [2021-03-10 21:15:05,012 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:05,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641695517] [2021-03-10 21:15:05,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:05,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:05,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557090645] [2021-03-10 21:15:05,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:05,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:05,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:05,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:05,013 INFO L87 Difference]: Start difference. First operand 185 states and 470 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:05,182 INFO L93 Difference]: Finished difference Result 209 states and 525 transitions. [2021-03-10 21:15:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:05,182 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:05,183 INFO L225 Difference]: With dead ends: 209 [2021-03-10 21:15:05,183 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 21:15:05,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 21:15:05,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 186. [2021-03-10 21:15:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.556756756756757) internal successors, (473), 185 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 473 transitions. [2021-03-10 21:15:05,185 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 473 transitions. Word has length 16 [2021-03-10 21:15:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:05,185 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 473 transitions. [2021-03-10 21:15:05,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 473 transitions. [2021-03-10 21:15:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:05,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:05,185 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:05,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-03-10 21:15:05,386 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:05,386 INFO L82 PathProgramCache]: Analyzing trace with hash 134910339, now seen corresponding path program 162 times [2021-03-10 21:15:05,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:05,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867247579] [2021-03-10 21:15:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:05,388 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:05,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513341169] [2021-03-10 21:15:05,388 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 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 21:15:05,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:15:05,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:05,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:05,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:05,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:05,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:05,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:05,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:05,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:15:05,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:05,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:05,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:05,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:05,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:15:05,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:05,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:05,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:05,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:05,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-03-10 21:15:05,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:05,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:05,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:05,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:15:05,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:05,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:05,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:05,540 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:15:05,575 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 21:15:05,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867247579] [2021-03-10 21:15:05,575 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:05,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513341169] [2021-03-10 21:15:05,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:05,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:05,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599250832] [2021-03-10 21:15:05,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:05,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:05,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:05,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:05,576 INFO L87 Difference]: Start difference. First operand 186 states and 473 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:05,770 INFO L93 Difference]: Finished difference Result 218 states and 549 transitions. [2021-03-10 21:15:05,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:05,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:05,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:05,770 INFO L225 Difference]: With dead ends: 218 [2021-03-10 21:15:05,771 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 21:15:05,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:05,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 21:15:05,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 184. [2021-03-10 21:15:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.551912568306011) internal successors, (467), 183 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 467 transitions. [2021-03-10 21:15:05,773 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 467 transitions. Word has length 16 [2021-03-10 21:15:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:05,773 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 467 transitions. [2021-03-10 21:15:05,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 467 transitions. [2021-03-10 21:15:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:05,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:05,773 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:05,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:05,980 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:05,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1011978561, now seen corresponding path program 163 times [2021-03-10 21:15:05,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:05,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587813349] [2021-03-10 21:15:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:05,982 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:05,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583153932] [2021-03-10 21:15:05,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:15:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:06,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:06,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:06,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:06,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:06,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:15:06,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:06,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:06,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:15:06,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:06,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:06,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-03-10 21:15:06,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:06,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:06,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:15:06,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:06,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,153 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:15:06,175 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 21:15:06,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587813349] [2021-03-10 21:15:06,175 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:06,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583153932] [2021-03-10 21:15:06,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:06,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:06,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098327012] [2021-03-10 21:15:06,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:06,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:06,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:06,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:06,176 INFO L87 Difference]: Start difference. First operand 184 states and 467 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:06,338 INFO L93 Difference]: Finished difference Result 204 states and 516 transitions. [2021-03-10 21:15:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:06,338 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:06,338 INFO L225 Difference]: With dead ends: 204 [2021-03-10 21:15:06,339 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 21:15:06,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 21:15:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 186. [2021-03-10 21:15:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.556756756756757) internal successors, (473), 185 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 473 transitions. [2021-03-10 21:15:06,340 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 473 transitions. Word has length 16 [2021-03-10 21:15:06,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:06,341 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 473 transitions. [2021-03-10 21:15:06,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 473 transitions. [2021-03-10 21:15:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:06,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:06,341 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:06,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:06,541 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:06,542 INFO L82 PathProgramCache]: Analyzing trace with hash 706365145, now seen corresponding path program 164 times [2021-03-10 21:15:06,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:06,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016189111] [2021-03-10 21:15:06,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:06,543 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:06,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720465272] [2021-03-10 21:15:06,543 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 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 21:15:06,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:06,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:06,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:06,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:06,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:06,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:06,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:15:06,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:06,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:06,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:15:06,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:15:06,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:06,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-03-10 21:15:06,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:15:06,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:06,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:15:06,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:06,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:06,686 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:15:06,721 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 21:15:06,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016189111] [2021-03-10 21:15:06,722 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:06,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720465272] [2021-03-10 21:15:06,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:06,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:06,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093284530] [2021-03-10 21:15:06,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:06,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:06,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:06,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:06,722 INFO L87 Difference]: Start difference. First operand 186 states and 473 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:06,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:06,862 INFO L93 Difference]: Finished difference Result 214 states and 541 transitions. [2021-03-10 21:15:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:06,863 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:06,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:06,863 INFO L225 Difference]: With dead ends: 214 [2021-03-10 21:15:06,863 INFO L226 Difference]: Without dead ends: 211 [2021-03-10 21:15:06,863 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:06,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-10 21:15:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 185. [2021-03-10 21:15:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5543478260869565) internal successors, (470), 184 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 470 transitions. [2021-03-10 21:15:06,865 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 470 transitions. Word has length 16 [2021-03-10 21:15:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:06,865 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 470 transitions. [2021-03-10 21:15:06,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:06,865 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 470 transitions. [2021-03-10 21:15:06,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:06,866 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:06,866 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:07,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:07,066 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash 724799171, now seen corresponding path program 165 times [2021-03-10 21:15:07,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:07,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297541922] [2021-03-10 21:15:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:07,068 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:07,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815416809] [2021-03-10 21:15:07,068 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 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 21:15:07,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:15:07,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:07,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:07,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:07,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:07,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:15:07,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:07,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:07,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-03-10 21:15:07,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:07,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:07,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-03-10 21:15:07,195 INFO L446 ElimStorePlain]: Different costs {0=[v_A_192], 5=[F]} [2021-03-10 21:15:07,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:07,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:07,219 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:07,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:15:07,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:07,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,226 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:15:07,274 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 21:15:07,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297541922] [2021-03-10 21:15:07,274 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:07,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815416809] [2021-03-10 21:15:07,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:07,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:07,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174750054] [2021-03-10 21:15:07,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:07,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:07,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:07,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:07,275 INFO L87 Difference]: Start difference. First operand 185 states and 470 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:07,432 INFO L93 Difference]: Finished difference Result 207 states and 525 transitions. [2021-03-10 21:15:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:07,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:07,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:07,433 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:15:07,433 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:15:07,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:15:07,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 183. [2021-03-10 21:15:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5494505494505493) internal successors, (464), 182 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2021-03-10 21:15:07,435 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 16 [2021-03-10 21:15:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:07,436 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2021-03-10 21:15:07,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2021-03-10 21:15:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:07,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:07,436 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:07,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-03-10 21:15:07,636 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash 385734557, now seen corresponding path program 166 times [2021-03-10 21:15:07,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:07,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411277308] [2021-03-10 21:15:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:07,638 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:07,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387189835] [2021-03-10 21:15:07,638 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 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 21:15:07,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:07,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:15:07,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:07,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:07,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:07,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:15:07,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:15:07,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:07,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:30 [2021-03-10 21:15:07,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:07,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:07,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-03-10 21:15:07,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:15:07,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:15:07,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-03-10 21:15:07,773 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:15:07,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:07,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:15:07,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:07,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:07,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:07,790 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:16 [2021-03-10 21:15:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:07,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411277308] [2021-03-10 21:15:07,822 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:07,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387189835] [2021-03-10 21:15:07,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:07,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:07,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886969541] [2021-03-10 21:15:07,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:07,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:07,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:07,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:07,823 INFO L87 Difference]: Start difference. First operand 183 states and 464 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:07,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:07,996 INFO L93 Difference]: Finished difference Result 225 states and 562 transitions. [2021-03-10 21:15:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:15:07,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:07,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:07,997 INFO L225 Difference]: With dead ends: 225 [2021-03-10 21:15:07,997 INFO L226 Difference]: Without dead ends: 221 [2021-03-10 21:15:07,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-03-10 21:15:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 179. [2021-03-10 21:15:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.539325842696629) internal successors, (452), 178 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 452 transitions. [2021-03-10 21:15:07,999 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 452 transitions. Word has length 16 [2021-03-10 21:15:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:07,999 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 452 transitions. [2021-03-10 21:15:07,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 452 transitions. [2021-03-10 21:15:07,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:07,999 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:07,999 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:08,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:08,200 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:08,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1134192199, now seen corresponding path program 167 times [2021-03-10 21:15:08,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:08,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790240664] [2021-03-10 21:15:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:08,201 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:08,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544479713] [2021-03-10 21:15:08,202 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 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 21:15:08,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:15:08,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:08,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:08,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:08,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:08,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:08,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:15:08,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:08,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:08,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-03-10 21:15:08,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:08,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:08,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:15:08,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:08,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:08,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:15:08,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:08,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,366 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:15:08,386 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 21:15:08,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790240664] [2021-03-10 21:15:08,387 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:08,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544479713] [2021-03-10 21:15:08,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:08,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:08,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078650880] [2021-03-10 21:15:08,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:08,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:08,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:08,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:08,387 INFO L87 Difference]: Start difference. First operand 179 states and 452 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:08,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:08,526 INFO L93 Difference]: Finished difference Result 210 states and 524 transitions. [2021-03-10 21:15:08,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:08,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:08,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:08,527 INFO L225 Difference]: With dead ends: 210 [2021-03-10 21:15:08,527 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 21:15:08,527 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 21:15:08,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 182. [2021-03-10 21:15:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.552486187845304) internal successors, (462), 181 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 462 transitions. [2021-03-10 21:15:08,529 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 462 transitions. Word has length 16 [2021-03-10 21:15:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:08,530 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 462 transitions. [2021-03-10 21:15:08,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 462 transitions. [2021-03-10 21:15:08,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:08,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:08,530 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:08,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:08,743 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:08,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:08,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1442431391, now seen corresponding path program 168 times [2021-03-10 21:15:08,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:08,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984863936] [2021-03-10 21:15:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:08,745 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:08,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392262404] [2021-03-10 21:15:08,745 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 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 21:15:08,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:15:08,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:08,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:08,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:08,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:08,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:08,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:15:08,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:15:08,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:08,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-03-10 21:15:08,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:08,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:08,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-03-10 21:15:08,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:08,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:08,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:15:08,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:08,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:08,891 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:15:08,924 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 21:15:08,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984863936] [2021-03-10 21:15:08,925 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:08,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392262404] [2021-03-10 21:15:08,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:08,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:08,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752894476] [2021-03-10 21:15:08,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:08,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:08,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:08,925 INFO L87 Difference]: Start difference. First operand 182 states and 462 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:09,078 INFO L93 Difference]: Finished difference Result 220 states and 549 transitions. [2021-03-10 21:15:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:09,078 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:09,079 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:15:09,079 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:15:09,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:15:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 181. [2021-03-10 21:15:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.55) internal successors, (459), 180 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 459 transitions. [2021-03-10 21:15:09,081 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 459 transitions. Word has length 16 [2021-03-10 21:15:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:09,081 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 459 transitions. [2021-03-10 21:15:09,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 459 transitions. [2021-03-10 21:15:09,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:09,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:09,081 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:09,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:09,282 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:09,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1423997365, now seen corresponding path program 169 times [2021-03-10 21:15:09,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:09,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037536037] [2021-03-10 21:15:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:09,283 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:09,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120292380] [2021-03-10 21:15:09,283 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 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 21:15:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:09,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:09,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:09,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:09,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:09,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:15:09,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:09,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:09,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-03-10 21:15:09,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:09,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:09,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:15:09,418 INFO L446 ElimStorePlain]: Different costs {0=[v_A_201], 5=[F]} [2021-03-10 21:15:09,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:09,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:09,441 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:09,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:15:09,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:09,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,448 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:15:09,493 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 21:15:09,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037536037] [2021-03-10 21:15:09,493 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:09,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120292380] [2021-03-10 21:15:09,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:09,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:09,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14601782] [2021-03-10 21:15:09,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:09,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:09,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:09,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:09,493 INFO L87 Difference]: Start difference. First operand 181 states and 459 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:09,639 INFO L93 Difference]: Finished difference Result 207 states and 524 transitions. [2021-03-10 21:15:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:09,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:09,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:09,640 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:15:09,640 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:15:09,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:15:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 180. [2021-03-10 21:15:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.547486033519553) internal successors, (456), 179 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:09,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 456 transitions. [2021-03-10 21:15:09,643 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 456 transitions. Word has length 16 [2021-03-10 21:15:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:09,644 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 456 transitions. [2021-03-10 21:15:09,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 456 transitions. [2021-03-10 21:15:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:09,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:09,644 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:09,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:09,867 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:09,867 INFO L82 PathProgramCache]: Analyzing trace with hash -107840061, now seen corresponding path program 170 times [2021-03-10 21:15:09,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:09,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909534247] [2021-03-10 21:15:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:09,869 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:09,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078202492] [2021-03-10 21:15:09,869 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 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 21:15:09,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:09,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:09,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:09,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:09,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:09,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:09,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-03-10 21:15:09,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:09,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:09,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-03-10 21:15:09,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:09,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:09,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:09,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-03-10 21:15:09,997 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:09,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:15:09,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:10,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:10,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:15:10,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:10,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:10,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:10,013 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:15:10,060 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 21:15:10,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909534247] [2021-03-10 21:15:10,060 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:10,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078202492] [2021-03-10 21:15:10,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:10,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:10,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183139404] [2021-03-10 21:15:10,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:10,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:10,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:10,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:10,061 INFO L87 Difference]: Start difference. First operand 180 states and 456 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:10,211 INFO L93 Difference]: Finished difference Result 207 states and 525 transitions. [2021-03-10 21:15:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:10,212 INFO L225 Difference]: With dead ends: 207 [2021-03-10 21:15:10,212 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 21:15:10,213 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 21:15:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 178. [2021-03-10 21:15:10,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.536723163841808) internal successors, (449), 177 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 449 transitions. [2021-03-10 21:15:10,214 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 449 transitions. Word has length 16 [2021-03-10 21:15:10,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:10,215 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 449 transitions. [2021-03-10 21:15:10,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 449 transitions. [2021-03-10 21:15:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:10,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:10,215 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:10,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:10,415 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:10,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:10,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1053990977, now seen corresponding path program 171 times [2021-03-10 21:15:10,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:10,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106995163] [2021-03-10 21:15:10,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:10,417 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:10,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060813996] [2021-03-10 21:15:10,417 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 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 21:15:10,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:15:10,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:10,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:10,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:10,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:15:10,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:10,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:10,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:10,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-03-10 21:15:10,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:10,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:10,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:10,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:10,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-03-10 21:15:10,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:10,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:10,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:10,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:10,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-03-10 21:15:10,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:15:10,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:10,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:10,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:15:10,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:10,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:10,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:10,576 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:15:10,597 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 21:15:10,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106995163] [2021-03-10 21:15:10,597 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:10,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060813996] [2021-03-10 21:15:10,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:10,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:10,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30474603] [2021-03-10 21:15:10,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:10,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:10,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:10,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:10,598 INFO L87 Difference]: Start difference. First operand 178 states and 449 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:10,737 INFO L93 Difference]: Finished difference Result 211 states and 523 transitions. [2021-03-10 21:15:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:10,737 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:10,737 INFO L225 Difference]: With dead ends: 211 [2021-03-10 21:15:10,737 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 21:15:10,737 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:10,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 21:15:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 180. [2021-03-10 21:15:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.541899441340782) internal successors, (455), 179 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 455 transitions. [2021-03-10 21:15:10,740 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 455 transitions. Word has length 16 [2021-03-10 21:15:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:10,740 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 455 transitions. [2021-03-10 21:15:10,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 455 transitions. [2021-03-10 21:15:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:10,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:10,740 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:10,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-03-10 21:15:10,955 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:10,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:10,955 INFO L82 PathProgramCache]: Analyzing trace with hash 664352729, now seen corresponding path program 172 times [2021-03-10 21:15:10,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:10,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070778859] [2021-03-10 21:15:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:10,957 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:10,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140102182] [2021-03-10 21:15:10,957 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 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 21:15:10,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:10,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:10,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:10,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:10,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:10,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:11,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:15:11,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:11,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:11,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-03-10 21:15:11,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:11,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:11,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:15:11,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:15:11,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:11,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:15:11,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:11,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,101 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:15:11,139 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 21:15:11,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070778859] [2021-03-10 21:15:11,139 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:11,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140102182] [2021-03-10 21:15:11,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:11,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:11,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719868935] [2021-03-10 21:15:11,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:11,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:11,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:11,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:11,140 INFO L87 Difference]: Start difference. First operand 180 states and 455 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:11,288 INFO L93 Difference]: Finished difference Result 221 states and 548 transitions. [2021-03-10 21:15:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:11,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:11,288 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:15:11,288 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 21:15:11,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:11,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 21:15:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 179. [2021-03-10 21:15:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.539325842696629) internal successors, (452), 178 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 452 transitions. [2021-03-10 21:15:11,290 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 452 transitions. Word has length 16 [2021-03-10 21:15:11,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:11,290 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 452 transitions. [2021-03-10 21:15:11,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 452 transitions. [2021-03-10 21:15:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:11,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:11,291 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:11,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-03-10 21:15:11,491 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:11,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:11,492 INFO L82 PathProgramCache]: Analyzing trace with hash 682786755, now seen corresponding path program 173 times [2021-03-10 21:15:11,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:11,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206335548] [2021-03-10 21:15:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:11,494 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:11,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131358182] [2021-03-10 21:15:11,494 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:11,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:15:11,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:11,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:11,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:11,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:11,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:11,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:15:11,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:11,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:11,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-03-10 21:15:11,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:11,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:11,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:15:11,612 INFO L446 ElimStorePlain]: Different costs {0=[v_A_209], 5=[F]} [2021-03-10 21:15:11,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:11,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:11,634 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:11,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:15:11,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:11,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:11,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:15:11,687 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 21:15:11,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206335548] [2021-03-10 21:15:11,687 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:11,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131358182] [2021-03-10 21:15:11,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:11,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:11,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983573798] [2021-03-10 21:15:11,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:11,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:11,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:11,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:11,688 INFO L87 Difference]: Start difference. First operand 179 states and 452 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:11,824 INFO L93 Difference]: Finished difference Result 208 states and 523 transitions. [2021-03-10 21:15:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:11,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:11,824 INFO L225 Difference]: With dead ends: 208 [2021-03-10 21:15:11,824 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 21:15:11,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:11,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 21:15:11,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 178. [2021-03-10 21:15:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.536723163841808) internal successors, (449), 177 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 449 transitions. [2021-03-10 21:15:11,826 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 449 transitions. Word has length 16 [2021-03-10 21:15:11,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:11,826 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 449 transitions. [2021-03-10 21:15:11,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,827 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 449 transitions. [2021-03-10 21:15:11,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:11,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:11,827 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:12,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:12,027 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:12,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1998944059, now seen corresponding path program 174 times [2021-03-10 21:15:12,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:12,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433812926] [2021-03-10 21:15:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:12,039 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:12,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341892804] [2021-03-10 21:15:12,039 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 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 21:15:12,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:15:12,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:12,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:12,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:15:12,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:12,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-03-10 21:15:12,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:12,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:12,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-03-10 21:15:12,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:12,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:12,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-03-10 21:15:12,177 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:12,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:15:12,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:12,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:15:12,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:12,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,199 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:15:12,263 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 21:15:12,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433812926] [2021-03-10 21:15:12,263 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:12,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341892804] [2021-03-10 21:15:12,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:12,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:12,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914336316] [2021-03-10 21:15:12,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:12,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:12,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:12,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:12,264 INFO L87 Difference]: Start difference. First operand 178 states and 449 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:12,426 INFO L93 Difference]: Finished difference Result 208 states and 524 transitions. [2021-03-10 21:15:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:12,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:12,426 INFO L225 Difference]: With dead ends: 208 [2021-03-10 21:15:12,426 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 21:15:12,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 21:15:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 177. [2021-03-10 21:15:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.528409090909091) internal successors, (445), 176 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 445 transitions. [2021-03-10 21:15:12,428 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 445 transitions. Word has length 16 [2021-03-10 21:15:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:12,429 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 445 transitions. [2021-03-10 21:15:12,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:12,429 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 445 transitions. [2021-03-10 21:15:12,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:12,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:12,429 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:12,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-03-10 21:15:12,629 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:12,630 INFO L82 PathProgramCache]: Analyzing trace with hash -149852477, now seen corresponding path program 175 times [2021-03-10 21:15:12,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:12,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526147482] [2021-03-10 21:15:12,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:12,632 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:12,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70736004] [2021-03-10 21:15:12,632 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 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 21:15:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:12,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:12,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:12,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:12,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:12,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-03-10 21:15:12,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:12,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:12,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-03-10 21:15:12,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:12,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:12,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-03-10 21:15:12,750 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:12,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:15:12,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:12,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:15:12,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:12,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:12,766 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:15:12,811 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 21:15:12,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526147482] [2021-03-10 21:15:12,811 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:12,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70736004] [2021-03-10 21:15:12,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:12,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:12,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118935790] [2021-03-10 21:15:12,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:12,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:12,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:12,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:12,812 INFO L87 Difference]: Start difference. First operand 177 states and 445 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:12,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:12,960 INFO L93 Difference]: Finished difference Result 208 states and 521 transitions. [2021-03-10 21:15:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:12,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:12,961 INFO L225 Difference]: With dead ends: 208 [2021-03-10 21:15:12,961 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 21:15:12,961 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 21:15:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 175. [2021-03-10 21:15:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.528735632183908) internal successors, (440), 174 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 440 transitions. [2021-03-10 21:15:12,963 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 440 transitions. Word has length 16 [2021-03-10 21:15:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:12,963 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 440 transitions. [2021-03-10 21:15:12,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 440 transitions. [2021-03-10 21:15:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:12,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:12,963 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:13,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:13,167 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:13,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:13,167 INFO L82 PathProgramCache]: Analyzing trace with hash -611091837, now seen corresponding path program 176 times [2021-03-10 21:15:13,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:13,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346768163] [2021-03-10 21:15:13,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:13,169 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:13,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231988222] [2021-03-10 21:15:13,169 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 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 21:15:13,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:13,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:13,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:13,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:13,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:13,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:13,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-03-10 21:15:13,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:13,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:13,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-03-10 21:15:13,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:13,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:13,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:15:13,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:13,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:13,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-03-10 21:15:13,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:13,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,327 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:15:13,349 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 21:15:13,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346768163] [2021-03-10 21:15:13,349 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:13,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231988222] [2021-03-10 21:15:13,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:13,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:13,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744253497] [2021-03-10 21:15:13,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:13,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:13,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:13,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:13,350 INFO L87 Difference]: Start difference. First operand 175 states and 440 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:13,506 INFO L93 Difference]: Finished difference Result 211 states and 520 transitions. [2021-03-10 21:15:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:13,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:13,507 INFO L225 Difference]: With dead ends: 211 [2021-03-10 21:15:13,507 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 21:15:13,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 21:15:13,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 177. [2021-03-10 21:15:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.534090909090909) internal successors, (446), 176 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 446 transitions. [2021-03-10 21:15:13,509 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 446 transitions. Word has length 16 [2021-03-10 21:15:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:13,509 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 446 transitions. [2021-03-10 21:15:13,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 446 transitions. [2021-03-10 21:15:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:13,510 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:13,510 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:13,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:13,710 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:13,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:13,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1107251869, now seen corresponding path program 177 times [2021-03-10 21:15:13,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:13,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532210221] [2021-03-10 21:15:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:13,712 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:13,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157119906] [2021-03-10 21:15:13,712 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 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 21:15:13,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:15:13,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:13,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:13,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:13,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:15:13,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:13,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-03-10 21:15:13,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:13,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:13,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-03-10 21:15:13,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:13,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:13,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-03-10 21:15:13,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-03-10 21:15:13,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:13,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 21:15:13,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:13,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:13,863 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-03-10 21:15:13,897 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 21:15:13,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532210221] [2021-03-10 21:15:13,897 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:13,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157119906] [2021-03-10 21:15:13,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:13,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:13,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724953201] [2021-03-10 21:15:13,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:13,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:13,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:13,898 INFO L87 Difference]: Start difference. First operand 177 states and 446 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:14,071 INFO L93 Difference]: Finished difference Result 221 states and 545 transitions. [2021-03-10 21:15:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:14,072 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:14,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:14,072 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:15:14,072 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 21:15:14,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 21:15:14,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 176. [2021-03-10 21:15:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.5314285714285716) internal successors, (443), 175 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 443 transitions. [2021-03-10 21:15:14,074 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 443 transitions. Word has length 16 [2021-03-10 21:15:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:14,074 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 443 transitions. [2021-03-10 21:15:14,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 443 transitions. [2021-03-10 21:15:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:14,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:14,075 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:14,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:14,275 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:14,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:14,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1125685895, now seen corresponding path program 178 times [2021-03-10 21:15:14,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:14,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333418262] [2021-03-10 21:15:14,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:14,277 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:14,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477032711] [2021-03-10 21:15:14,277 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 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 21:15:14,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:14,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:14,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:14,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:14,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:14,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-03-10 21:15:14,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:14,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:14,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-03-10 21:15:14,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-03-10 21:15:14,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:14,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-03-10 21:15:14,402 INFO L446 ElimStorePlain]: Different costs {0=[v_A_219], 5=[F]} [2021-03-10 21:15:14,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:14,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:14,425 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:14,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-03-10 21:15:14,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:14,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,432 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-03-10 21:15:14,477 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 21:15:14,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333418262] [2021-03-10 21:15:14,477 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:14,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477032711] [2021-03-10 21:15:14,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:14,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:14,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390278319] [2021-03-10 21:15:14,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:14,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:14,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:14,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:14,478 INFO L87 Difference]: Start difference. First operand 176 states and 443 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:14,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:14,643 INFO L93 Difference]: Finished difference Result 215 states and 533 transitions. [2021-03-10 21:15:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:14,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:14,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:14,643 INFO L225 Difference]: With dead ends: 215 [2021-03-10 21:15:14,643 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 21:15:14,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 21:15:14,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-03-10 21:15:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.528735632183908) internal successors, (440), 174 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 440 transitions. [2021-03-10 21:15:14,650 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 440 transitions. Word has length 16 [2021-03-10 21:15:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:14,650 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 440 transitions. [2021-03-10 21:15:14,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 440 transitions. [2021-03-10 21:15:14,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:14,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:14,650 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:14,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:14,851 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:14,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:14,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1853124097, now seen corresponding path program 179 times [2021-03-10 21:15:14,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:14,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145362846] [2021-03-10 21:15:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:14,853 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:14,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544224145] [2021-03-10 21:15:14,853 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 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 21:15:14,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:15:14,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:14,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:14,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:14,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-03-10 21:15:14,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:14,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-03-10 21:15:14,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:14,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:14,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-03-10 21:15:14,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:14,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:14,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-03-10 21:15:14,971 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:14,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:15:14,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:14,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:15:14,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:14,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:14,986 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:15:15,030 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 21:15:15,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145362846] [2021-03-10 21:15:15,031 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:15,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544224145] [2021-03-10 21:15:15,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:15,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:15,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036197292] [2021-03-10 21:15:15,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:15,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:15,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:15,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:15,031 INFO L87 Difference]: Start difference. First operand 175 states and 440 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:15,177 INFO L93 Difference]: Finished difference Result 218 states and 542 transitions. [2021-03-10 21:15:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:15,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:15,178 INFO L225 Difference]: With dead ends: 218 [2021-03-10 21:15:15,178 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 21:15:15,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:15,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 21:15:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 174. [2021-03-10 21:15:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.520231213872832) internal successors, (436), 173 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 436 transitions. [2021-03-10 21:15:15,181 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 436 transitions. Word has length 16 [2021-03-10 21:15:15,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:15,181 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 436 transitions. [2021-03-10 21:15:15,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 436 transitions. [2021-03-10 21:15:15,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:15,181 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:15,181 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:15,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable197 [2021-03-10 21:15:15,402 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:15,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:15,402 INFO L82 PathProgramCache]: Analyzing trace with hash 293046663, now seen corresponding path program 180 times [2021-03-10 21:15:15,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:15,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38844329] [2021-03-10 21:15:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:15,404 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:15,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565994324] [2021-03-10 21:15:15,404 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 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 21:15:15,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:15:15,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:15,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:15,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:15,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:15,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:15,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:15,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-03-10 21:15:15,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:15,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:15,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:15,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:15,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-03-10 21:15:15,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:15,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:15,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:15,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:15,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-03-10 21:15:15,521 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:15,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:15:15,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:15,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:15,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:15:15,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:15,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:15,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:15,536 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:15:15,583 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 21:15:15,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38844329] [2021-03-10 21:15:15,583 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:15,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565994324] [2021-03-10 21:15:15,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:15,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:15,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544475462] [2021-03-10 21:15:15,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:15,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:15,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:15,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:15,583 INFO L87 Difference]: Start difference. First operand 174 states and 436 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:15,738 INFO L93 Difference]: Finished difference Result 219 states and 545 transitions. [2021-03-10 21:15:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:15,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:15,739 INFO L225 Difference]: With dead ends: 219 [2021-03-10 21:15:15,739 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 21:15:15,739 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:15,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 21:15:15,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 173. [2021-03-10 21:15:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.5174418604651163) internal successors, (433), 172 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 433 transitions. [2021-03-10 21:15:15,741 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 433 transitions. Word has length 16 [2021-03-10 21:15:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:15,741 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 433 transitions. [2021-03-10 21:15:15,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 433 transitions. [2021-03-10 21:15:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:15,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:15,741 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:15,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:15,942 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:15,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:15,942 INFO L82 PathProgramCache]: Analyzing trace with hash -801044925, now seen corresponding path program 181 times [2021-03-10 21:15:15,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:15,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996084001] [2021-03-10 21:15:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:15,944 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:15,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773333398] [2021-03-10 21:15:15,945 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 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 21:15:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:15,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:15:15,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:15,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:15,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:15,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:15,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:15,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-03-10 21:15:15,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:15,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:16,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:16,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:16,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-03-10 21:15:16,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-03-10 21:15:16,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:16,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:16,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:16,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-03-10 21:15:16,068 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-03-10 21:15:16,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-03-10 21:15:16,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:16,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:16,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-03-10 21:15:16,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:16,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:16,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:16,086 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-03-10 21:15:16,149 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 21:15:16,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996084001] [2021-03-10 21:15:16,149 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:16,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773333398] [2021-03-10 21:15:16,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:16,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:16,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478360514] [2021-03-10 21:15:16,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:16,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:16,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:16,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:16,150 INFO L87 Difference]: Start difference. First operand 173 states and 433 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:16,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:16,384 INFO L93 Difference]: Finished difference Result 229 states and 576 transitions. [2021-03-10 21:15:16,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:16,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:16,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:16,385 INFO L225 Difference]: With dead ends: 229 [2021-03-10 21:15:16,385 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 21:15:16,385 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 21:15:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2021-03-10 21:15:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.538922155688623) internal successors, (424), 167 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 424 transitions. [2021-03-10 21:15:16,388 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 424 transitions. Word has length 16 [2021-03-10 21:15:16,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:16,388 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 424 transitions. [2021-03-10 21:15:16,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:16,388 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 424 transitions. [2021-03-10 21:15:16,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:15:16,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:16,389 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:16,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-03-10 21:15:16,599 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:16,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:16,599 INFO L82 PathProgramCache]: Analyzing trace with hash -919129405, now seen corresponding path program 182 times [2021-03-10 21:15:16,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:16,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137862485] [2021-03-10 21:15:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:16,601 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:16,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757657777] [2021-03-10 21:15:16,601 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 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 21:15:16,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:16,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:16,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:16,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:16,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137862485] [2021-03-10 21:15:16,721 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:16,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757657777] [2021-03-10 21:15:16,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:16,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:15:16,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906933375] [2021-03-10 21:15:16,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:15:16,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:16,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:15:16,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:15:16,722 INFO L87 Difference]: Start difference. First operand 168 states and 424 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:16,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:16,859 INFO L93 Difference]: Finished difference Result 228 states and 571 transitions. [2021-03-10 21:15:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:15:16,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:15:16,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:16,860 INFO L225 Difference]: With dead ends: 228 [2021-03-10 21:15:16,860 INFO L226 Difference]: Without dead ends: 223 [2021-03-10 21:15:16,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:15:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-03-10 21:15:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 160. [2021-03-10 21:15:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.5345911949685536) internal successors, (403), 159 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2021-03-10 21:15:16,862 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 16 [2021-03-10 21:15:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:16,862 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2021-03-10 21:15:16,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2021-03-10 21:15:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:16,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:16,862 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:17,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-03-10 21:15:17,063 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:17,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:17,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1571347686, now seen corresponding path program 183 times [2021-03-10 21:15:17,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:17,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630266388] [2021-03-10 21:15:17,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:17,065 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:17,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876981947] [2021-03-10 21:15:17,065 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 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 21:15:17,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:15:17,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:17,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:15:17,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:17,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:17,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:17,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:17,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:17,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-03-10 21:15:17,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:15:17,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:17,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:17,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:17,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-03-10 21:15:17,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:17,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-03-10 21:15:17,187 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:15:17,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:17,214 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-03-10 21:15:17,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2021-03-10 21:15:17,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:17,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:17,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:15:17,236 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:51, output treesize:45 [2021-03-10 21:15:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:17,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630266388] [2021-03-10 21:15:17,381 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:17,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876981947] [2021-03-10 21:15:17,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:17,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:15:17,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150910103] [2021-03-10 21:15:17,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:15:17,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:17,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:15:17,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:15:17,382 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 21:15:17,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:17,609 INFO L93 Difference]: Finished difference Result 186 states and 437 transitions. [2021-03-10 21:15:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:15:17,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 17 [2021-03-10 21:15:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:17,610 INFO L225 Difference]: With dead ends: 186 [2021-03-10 21:15:17,610 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 21:15:17,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:15:17,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 21:15:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2021-03-10 21:15:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.5448717948717947) internal successors, (397), 156 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 21:15:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 397 transitions. [2021-03-10 21:15:17,613 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 397 transitions. Word has length 17 [2021-03-10 21:15:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:17,613 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 397 transitions. [2021-03-10 21:15:17,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 21:15:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 397 transitions. [2021-03-10 21:15:17,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:17,613 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:17,613 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:17,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-03-10 21:15:17,814 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:17,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:17,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1566265809, now seen corresponding path program 184 times [2021-03-10 21:15:17,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:17,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794473683] [2021-03-10 21:15:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:17,816 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:17,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325345237] [2021-03-10 21:15:17,816 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 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 21:15:17,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:17,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:17,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:15:17,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:17,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794473683] [2021-03-10 21:15:17,992 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:17,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325345237] [2021-03-10 21:15:17,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:17,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-03-10 21:15:17,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565954315] [2021-03-10 21:15:17,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:17,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:17,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:17,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:17,992 INFO L87 Difference]: Start difference. First operand 157 states and 397 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 21:15:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:18,219 INFO L93 Difference]: Finished difference Result 229 states and 548 transitions. [2021-03-10 21:15:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:15:18,220 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 17 [2021-03-10 21:15:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:18,220 INFO L225 Difference]: With dead ends: 229 [2021-03-10 21:15:18,220 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 21:15:18,220 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 21:15:18,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2021-03-10 21:15:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.502994011976048) internal successors, (418), 167 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:18,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 418 transitions. [2021-03-10 21:15:18,223 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 418 transitions. Word has length 17 [2021-03-10 21:15:18,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:18,223 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 418 transitions. [2021-03-10 21:15:18,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 21:15:18,223 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 418 transitions. [2021-03-10 21:15:18,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:18,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:18,223 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:18,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-03-10 21:15:18,435 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:18,435 INFO L82 PathProgramCache]: Analyzing trace with hash -35767269, now seen corresponding path program 185 times [2021-03-10 21:15:18,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:18,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555164560] [2021-03-10 21:15:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:18,437 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:18,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964401094] [2021-03-10 21:15:18,437 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 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 21:15:18,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:15:18,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:18,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:15:18,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:18,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555164560] [2021-03-10 21:15:18,559 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:18,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964401094] [2021-03-10 21:15:18,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:18,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-03-10 21:15:18,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548432010] [2021-03-10 21:15:18,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:18,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:18,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:18,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:18,560 INFO L87 Difference]: Start difference. First operand 168 states and 418 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 21:15:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:18,937 INFO L93 Difference]: Finished difference Result 302 states and 719 transitions. [2021-03-10 21:15:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:15:18,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 17 [2021-03-10 21:15:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:18,938 INFO L225 Difference]: With dead ends: 302 [2021-03-10 21:15:18,938 INFO L226 Difference]: Without dead ends: 299 [2021-03-10 21:15:18,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:15:18,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-03-10 21:15:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 196. [2021-03-10 21:15:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6153846153846154) internal successors, (510), 195 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 510 transitions. [2021-03-10 21:15:18,941 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 510 transitions. Word has length 17 [2021-03-10 21:15:18,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:18,941 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 510 transitions. [2021-03-10 21:15:18,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 21:15:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 510 transitions. [2021-03-10 21:15:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:18,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:18,941 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:19,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:19,142 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:19,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:19,142 INFO L82 PathProgramCache]: Analyzing trace with hash -146589789, now seen corresponding path program 186 times [2021-03-10 21:15:19,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:19,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271145638] [2021-03-10 21:15:19,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:19,144 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:19,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951007030] [2021-03-10 21:15:19,144 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 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 21:15:19,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:15:19,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:19,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:15:19,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:19,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-03-10 21:15:19,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:19,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:19,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:19,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-03-10 21:15:19,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 21:15:19,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:19,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:19,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:19,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-03-10 21:15:19,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:15:19,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:19,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:19,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:19,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2021-03-10 21:15:19,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 21:15:19,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2021-03-10 21:15:19,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:19,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:19,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:19,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2021-03-10 21:15:19,318 INFO L354 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2021-03-10 21:15:19,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 42 [2021-03-10 21:15:19,321 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 21:15:19,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:19,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-03-10 21:15:19,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:15:19,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:15:19,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:15:19,338 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:62, output treesize:25 [2021-03-10 21:15:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:19,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271145638] [2021-03-10 21:15:19,407 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:19,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951007030] [2021-03-10 21:15:19,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:19,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-03-10 21:15:19,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262640355] [2021-03-10 21:15:19,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:19,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:19,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:19,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:19,408 INFO L87 Difference]: Start difference. First operand 196 states and 510 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 21:15:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:19,751 INFO L93 Difference]: Finished difference Result 288 states and 699 transitions. [2021-03-10 21:15:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:15:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 17 [2021-03-10 21:15:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:19,752 INFO L225 Difference]: With dead ends: 288 [2021-03-10 21:15:19,752 INFO L226 Difference]: Without dead ends: 285 [2021-03-10 21:15:19,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:19,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-03-10 21:15:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 197. [2021-03-10 21:15:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.622448979591837) internal successors, (514), 196 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 514 transitions. [2021-03-10 21:15:19,754 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 514 transitions. Word has length 17 [2021-03-10 21:15:19,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:19,754 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 514 transitions. [2021-03-10 21:15:19,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 21:15:19,754 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 514 transitions. [2021-03-10 21:15:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:19,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:19,755 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:19,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-03-10 21:15:19,955 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:19,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:19,956 INFO L82 PathProgramCache]: Analyzing trace with hash -414980841, now seen corresponding path program 187 times [2021-03-10 21:15:19,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:19,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837305518] [2021-03-10 21:15:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:19,957 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:19,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541713294] [2021-03-10 21:15:19,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:15:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:19,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:15:19,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:20,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837305518] [2021-03-10 21:15:20,095 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:20,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541713294] [2021-03-10 21:15:20,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:20,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-03-10 21:15:20,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159664669] [2021-03-10 21:15:20,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:20,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:20,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:20,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:20,096 INFO L87 Difference]: Start difference. First operand 197 states and 514 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 21:15:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:20,482 INFO L93 Difference]: Finished difference Result 304 states and 733 transitions. [2021-03-10 21:15:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:15:20,483 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 17 [2021-03-10 21:15:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:20,483 INFO L225 Difference]: With dead ends: 304 [2021-03-10 21:15:20,483 INFO L226 Difference]: Without dead ends: 301 [2021-03-10 21:15:20,483 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:15:20,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-03-10 21:15:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 203. [2021-03-10 21:15:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.618811881188119) internal successors, (529), 202 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 529 transitions. [2021-03-10 21:15:20,486 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 529 transitions. Word has length 17 [2021-03-10 21:15:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:20,487 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 529 transitions. [2021-03-10 21:15:20,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 21:15:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 529 transitions. [2021-03-10 21:15:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:20,487 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:20,487 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:20,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-03-10 21:15:20,709 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:20,709 INFO L82 PathProgramCache]: Analyzing trace with hash 120248961, now seen corresponding path program 188 times [2021-03-10 21:15:20,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:20,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821049547] [2021-03-10 21:15:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:20,711 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:20,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53473671] [2021-03-10 21:15:20,711 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 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 21:15:20,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:20,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:20,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:15:20,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:20,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821049547] [2021-03-10 21:15:20,812 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:20,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53473671] [2021-03-10 21:15:20,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:20,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-03-10 21:15:20,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084133510] [2021-03-10 21:15:20,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:15:20,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:20,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:15:20,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:15:20,813 INFO L87 Difference]: Start difference. First operand 203 states and 529 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 21:15:21,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:21,054 INFO L93 Difference]: Finished difference Result 410 states and 936 transitions. [2021-03-10 21:15:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:15:21,054 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 17 [2021-03-10 21:15:21,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:21,055 INFO L225 Difference]: With dead ends: 410 [2021-03-10 21:15:21,055 INFO L226 Difference]: Without dead ends: 395 [2021-03-10 21:15:21,055 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:21,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-03-10 21:15:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 267. [2021-03-10 21:15:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.680451127819549) internal successors, (713), 266 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:21,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 713 transitions. [2021-03-10 21:15:21,058 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 713 transitions. Word has length 17 [2021-03-10 21:15:21,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:21,058 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 713 transitions. [2021-03-10 21:15:21,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 21:15:21,058 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 713 transitions. [2021-03-10 21:15:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:21,059 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:21,059 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:21,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:21,261 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:21,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:21,261 INFO L82 PathProgramCache]: Analyzing trace with hash 626595227, now seen corresponding path program 189 times [2021-03-10 21:15:21,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:21,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895236720] [2021-03-10 21:15:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:21,263 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:21,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617850946] [2021-03-10 21:15:21,265 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 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 21:15:21,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:15:21,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:21,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:15:21,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:21,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895236720] [2021-03-10 21:15:21,428 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:21,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617850946] [2021-03-10 21:15:21,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:21,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-03-10 21:15:21,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773124191] [2021-03-10 21:15:21,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:21,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:21,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:21,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:21,429 INFO L87 Difference]: Start difference. First operand 267 states and 713 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 21:15:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:21,707 INFO L93 Difference]: Finished difference Result 357 states and 893 transitions. [2021-03-10 21:15:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:15:21,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 17 [2021-03-10 21:15:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:21,708 INFO L225 Difference]: With dead ends: 357 [2021-03-10 21:15:21,708 INFO L226 Difference]: Without dead ends: 354 [2021-03-10 21:15:21,708 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:15:21,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-03-10 21:15:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 269. [2021-03-10 21:15:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.6828358208955225) internal successors, (719), 268 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 719 transitions. [2021-03-10 21:15:21,712 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 719 transitions. Word has length 17 [2021-03-10 21:15:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:21,712 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 719 transitions. [2021-03-10 21:15:21,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 21:15:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 719 transitions. [2021-03-10 21:15:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:21,712 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:21,712 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:21,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-03-10 21:15:21,918 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:21,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:21,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1990413727, now seen corresponding path program 190 times [2021-03-10 21:15:21,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:21,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966490421] [2021-03-10 21:15:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:21,920 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:21,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794851217] [2021-03-10 21:15:21,920 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 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 21:15:21,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:21,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:21,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:15:21,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:22,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966490421] [2021-03-10 21:15:22,030 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:22,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794851217] [2021-03-10 21:15:22,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:22,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-03-10 21:15:22,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089203934] [2021-03-10 21:15:22,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:22,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:22,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:22,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:22,031 INFO L87 Difference]: Start difference. First operand 269 states and 719 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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 21:15:22,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:22,248 INFO L93 Difference]: Finished difference Result 354 states and 892 transitions. [2021-03-10 21:15:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:22,249 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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 17 [2021-03-10 21:15:22,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:22,249 INFO L225 Difference]: With dead ends: 354 [2021-03-10 21:15:22,249 INFO L226 Difference]: Without dead ends: 333 [2021-03-10 21:15:22,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:15:22,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-03-10 21:15:22,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 294. [2021-03-10 21:15:22,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.6996587030716723) internal successors, (791), 293 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:22,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 791 transitions. [2021-03-10 21:15:22,253 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 791 transitions. Word has length 17 [2021-03-10 21:15:22,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:22,253 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 791 transitions. [2021-03-10 21:15:22,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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 21:15:22,253 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 791 transitions. [2021-03-10 21:15:22,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:22,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:22,253 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:22,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:22,454 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:22,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1017240957, now seen corresponding path program 191 times [2021-03-10 21:15:22,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:22,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131380640] [2021-03-10 21:15:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:22,456 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:22,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136232000] [2021-03-10 21:15:22,456 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 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 21:15:22,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:15:22,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:22,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:15:22,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:22,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131380640] [2021-03-10 21:15:22,584 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-03-10 21:15:22,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136232000] [2021-03-10 21:15:22,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:15:22,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-03-10 21:15:22,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017308922] [2021-03-10 21:15:22,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:22,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:22,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:22,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:22,585 INFO L87 Difference]: Start difference. First operand 294 states and 791 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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 21:15:22,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:22,739 INFO L93 Difference]: Finished difference Result 423 states and 1083 transitions. [2021-03-10 21:15:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:15:22,739 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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 17 [2021-03-10 21:15:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:22,740 INFO L225 Difference]: With dead ends: 423 [2021-03-10 21:15:22,740 INFO L226 Difference]: Without dead ends: 417 [2021-03-10 21:15:22,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:15:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-03-10 21:15:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 314. [2021-03-10 21:15:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.7380191693290734) internal successors, (857), 313 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:22,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 857 transitions. [2021-03-10 21:15:22,744 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 857 transitions. Word has length 17 [2021-03-10 21:15:22,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:22,744 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 857 transitions. [2021-03-10 21:15:22,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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 21:15:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 857 transitions. [2021-03-10 21:15:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:22,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:22,745 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:22,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-03-10 21:15:22,947 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:22,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1548679005, now seen corresponding path program 192 times [2021-03-10 21:15:22,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:22,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189932837] [2021-03-10 21:15:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:22,948 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-03-10 21:15:22,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123046974] [2021-03-10 21:15:22,949 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 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 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown