/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/rew.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:54:12,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:54:12,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:54:12,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:54:12,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:54:12,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:54:12,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:54:12,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:54:12,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:54:12,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:54:12,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:54:12,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:54:12,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:54:12,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:54:12,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:54:12,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:54:12,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:54:12,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:54:12,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:54:12,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:54:12,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:54:12,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:54:12,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:54:12,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:54:12,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 18:54:12,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 18:54:12,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 18:54:12,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 18:54:12,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 18:54:12,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 18:54:12,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:54:12,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:54:12,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:54:12,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:54:12,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:54:12,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:54:12,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:54:12,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:54:12,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:54:12,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:54:12,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:54:12,445 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:54:12,463 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:54:12,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:54:12,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:54:12,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:54:12,468 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:54:12,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:54:12,471 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:54:12,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:54:12,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:54:12,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:54:12,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:54:12,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:54:12,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:54:12,472 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:54:12,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:54:12,473 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:54:12,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:54:12,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:54:12,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:54:12,474 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:54:12,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:54:12,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:54:12,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:54:12,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:54:12,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:54:12,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:54:12,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:54:12,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:54:12,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:54:12,734 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:54:12,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:54:12,753 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:54:12,754 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:54:12,755 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:54:12,756 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rew.c [2019-11-06 18:54:12,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b66b1e87/a769f5555e914135885a828c9ffe5385/FLAGac309e7a5 [2019-11-06 18:54:13,318 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:54:13,319 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rew.c [2019-11-06 18:54:13,325 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b66b1e87/a769f5555e914135885a828c9ffe5385/FLAGac309e7a5 [2019-11-06 18:54:13,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b66b1e87/a769f5555e914135885a828c9ffe5385 [2019-11-06 18:54:13,745 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:54:13,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:54:13,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:54:13,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:54:13,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:54:13,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:54:13" (1/1) ... [2019-11-06 18:54:13,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35cd8d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:54:13, skipping insertion in model container [2019-11-06 18:54:13,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:54:13" (1/1) ... [2019-11-06 18:54:13,763 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:54:13,782 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:54:13,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:54:13,988 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:54:14,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:54:14,024 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:54:14,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:54:14 WrapperNode [2019-11-06 18:54:14,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:54:14,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:54:14,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:54:14,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:54:14,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:54:14" (1/1) ... [2019-11-06 18:54:14,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:54:14" (1/1) ... [2019-11-06 18:54:14,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:54:14" (1/1) ... [2019-11-06 18:54:14,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:54:14" (1/1) ... [2019-11-06 18:54:14,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:54:14" (1/1) ... [2019-11-06 18:54:14,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:54:14" (1/1) ... [2019-11-06 18:54:14,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:54:14" (1/1) ... [2019-11-06 18:54:14,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:54:14,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:54:14,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:54:14,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:54:14,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:54:14" (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 [2019-11-06 18:54:14,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:54:14,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:54:14,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:54:14,185 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:54:14,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:54:14,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:54:14,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:54:14,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:54:14,185 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:54:14,186 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:54:14,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:54:14,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:54:14,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:54:14,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:54:14,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:54:14,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:54:14,461 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:54:14,461 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-06 18:54:14,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:54:14 BoogieIcfgContainer [2019-11-06 18:54:14,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:54:14,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:54:14,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:54:14,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:54:14,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:54:13" (1/3) ... [2019-11-06 18:54:14,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0757e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:54:14, skipping insertion in model container [2019-11-06 18:54:14,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:54:14" (2/3) ... [2019-11-06 18:54:14,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0757e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:54:14, skipping insertion in model container [2019-11-06 18:54:14,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:54:14" (3/3) ... [2019-11-06 18:54:14,470 INFO L109 eAbstractionObserver]: Analyzing ICFG rew.c [2019-11-06 18:54:14,479 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:54:14,485 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:54:14,493 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:54:14,512 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:54:14,512 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:54:14,512 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:54:14,512 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:54:14,513 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:54:14,513 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:54:14,513 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:54:14,513 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:54:14,530 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-06 18:54:14,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 18:54:14,535 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:54:14,536 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:54:14,538 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:54:14,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:54:14,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1294486485, now seen corresponding path program 1 times [2019-11-06 18:54:14,549 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:54:14,549 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123690284] [2019-11-06 18:54:14,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:54:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:54:14,748 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123690284] [2019-11-06 18:54:14,748 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:54:14,749 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:54:14,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120935643] [2019-11-06 18:54:14,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:54:14,755 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:54:14,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:54:14,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:54:14,771 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-06 18:54:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:54:14,894 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-11-06 18:54:14,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:54:14,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-06 18:54:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:54:14,902 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:54:14,903 INFO L226 Difference]: Without dead ends: 22 [2019-11-06 18:54:14,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:54:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-06 18:54:14,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-06 18:54:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-06 18:54:14,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-06 18:54:14,938 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-11-06 18:54:14,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:54:14,939 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-06 18:54:14,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:54:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-06 18:54:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 18:54:14,940 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:54:14,940 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:54:14,941 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:54:14,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:54:14,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1653126776, now seen corresponding path program 1 times [2019-11-06 18:54:14,941 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:54:14,942 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624760492] [2019-11-06 18:54:14,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:54:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:54:15,056 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624760492] [2019-11-06 18:54:15,056 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:54:15,056 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:54:15,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064589593] [2019-11-06 18:54:15,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:54:15,059 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:54:15,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:54:15,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:54:15,060 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2019-11-06 18:54:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:54:15,163 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2019-11-06 18:54:15,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:54:15,165 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-06 18:54:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:54:15,166 INFO L225 Difference]: With dead ends: 41 [2019-11-06 18:54:15,166 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:54:15,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:54:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:54:15,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-06 18:54:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:54:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-06 18:54:15,183 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-11-06 18:54:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:54:15,183 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-06 18:54:15,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:54:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-06 18:54:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 18:54:15,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:54:15,186 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:54:15,187 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:54:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:54:15,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1007604157, now seen corresponding path program 1 times [2019-11-06 18:54:15,188 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:54:15,189 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732775157] [2019-11-06 18:54:15,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:54:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:54:15,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732775157] [2019-11-06 18:54:15,303 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:54:15,303 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:54:15,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253934917] [2019-11-06 18:54:15,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:54:15,304 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:54:15,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:54:15,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:54:15,305 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2019-11-06 18:54:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:54:15,388 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-11-06 18:54:15,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:54:15,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-06 18:54:15,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:54:15,390 INFO L225 Difference]: With dead ends: 38 [2019-11-06 18:54:15,390 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 18:54:15,391 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:54:15,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 18:54:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-06 18:54:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:54:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-06 18:54:15,398 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2019-11-06 18:54:15,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:54:15,398 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-06 18:54:15,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:54:15,399 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-06 18:54:15,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:54:15,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:54:15,400 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:54:15,400 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:54:15,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:54:15,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2051596356, now seen corresponding path program 1 times [2019-11-06 18:54:15,401 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:54:15,401 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120735604] [2019-11-06 18:54:15,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:54:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:54:15,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120735604] [2019-11-06 18:54:15,827 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486825376] [2019-11-06 18:54:15,827 INFO L94 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 [2019-11-06 18:54:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:15,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:54:15,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:54:15,975 INFO L375 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 [2019-11-06 18:54:15,976 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:15,986 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:15,989 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:54:15,990 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-06 18:54:16,080 INFO L341 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2019-11-06 18:54:16,081 INFO L375 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 27 treesize of output 22 [2019-11-06 18:54:16,082 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:16,091 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:16,092 INFO L496 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. [2019-11-06 18:54:16,092 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:33 [2019-11-06 18:54:16,200 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:16,201 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 [2019-11-06 18:54:16,204 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:16,212 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:16,213 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:54:16,213 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:40, output treesize:7 [2019-11-06 18:54:16,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:54:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:54:16,301 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:54:16,302 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-11-06 18:54:16,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087187052] [2019-11-06 18:54:16,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:54:16,304 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:54:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:54:16,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:54:16,306 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 19 states. [2019-11-06 18:54:17,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:54:17,492 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-11-06 18:54:17,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:54:17,493 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-11-06 18:54:17,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:54:17,494 INFO L225 Difference]: With dead ends: 42 [2019-11-06 18:54:17,494 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:54:17,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:54:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:54:17,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2019-11-06 18:54:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:54:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-06 18:54:17,504 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 22 [2019-11-06 18:54:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:54:17,504 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-06 18:54:17,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:54:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-06 18:54:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:54:17,505 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:54:17,505 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:54:17,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:54:17,711 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:54:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:54:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash -730987952, now seen corresponding path program 1 times [2019-11-06 18:54:17,711 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:54:17,711 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513722289] [2019-11-06 18:54:17,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:54:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:54:17,903 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513722289] [2019-11-06 18:54:17,903 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062575937] [2019-11-06 18:54:17,904 INFO L94 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 [2019-11-06 18:54:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:17,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 18:54:17,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:54:17,993 INFO L375 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 [2019-11-06 18:54:17,993 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:17,999 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:18,000 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:54:18,000 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2019-11-06 18:54:18,159 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-11-06 18:54:18,159 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:18,163 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:18,164 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:54:18,164 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2019-11-06 18:54:18,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:54:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:54:18,223 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:54:18,223 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2019-11-06 18:54:18,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196407356] [2019-11-06 18:54:18,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-06 18:54:18,224 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:54:18,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-06 18:54:18,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:54:18,225 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 23 states. [2019-11-06 18:54:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:54:31,114 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2019-11-06 18:54:31,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:54:31,115 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-11-06 18:54:31,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:54:31,119 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:54:31,119 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:54:31,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:54:31,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:54:31,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 49. [2019-11-06 18:54:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:54:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-11-06 18:54:31,131 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 30 [2019-11-06 18:54:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:54:31,132 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-11-06 18:54:31,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-06 18:54:31,132 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-11-06 18:54:31,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:54:31,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:54:31,133 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:54:31,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:54:31,338 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:54:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:54:31,338 INFO L82 PathProgramCache]: Analyzing trace with hash 515182859, now seen corresponding path program 2 times [2019-11-06 18:54:31,339 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:54:31,339 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234222165] [2019-11-06 18:54:31,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:54:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:54:31,586 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234222165] [2019-11-06 18:54:31,586 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239039346] [2019-11-06 18:54:31,586 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:54:31,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:54:31,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:54:31,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 18:54:31,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:54:31,702 INFO L375 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 [2019-11-06 18:54:31,703 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:31,711 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:31,712 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:54:31,712 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-11-06 18:54:31,769 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:54:31,771 INFO L375 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 31 treesize of output 24 [2019-11-06 18:54:31,771 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:31,780 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:31,781 INFO L496 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. [2019-11-06 18:54:31,782 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:36 [2019-11-06 18:54:32,073 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:54:32,075 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:32,076 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 10 [2019-11-06 18:54:32,076 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:32,083 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:32,084 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:54:32,084 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:7 [2019-11-06 18:54:32,105 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:54:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:54:32,168 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:54:32,169 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2019-11-06 18:54:32,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785490649] [2019-11-06 18:54:32,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 18:54:32,169 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:54:32,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 18:54:32,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:54:32,170 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 26 states. [2019-11-06 18:54:45,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:54:45,576 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2019-11-06 18:54:45,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:54:45,577 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2019-11-06 18:54:45,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:54:45,579 INFO L225 Difference]: With dead ends: 84 [2019-11-06 18:54:45,579 INFO L226 Difference]: Without dead ends: 82 [2019-11-06 18:54:45,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 18:54:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-06 18:54:45,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 41. [2019-11-06 18:54:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:54:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-11-06 18:54:45,592 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 34 [2019-11-06 18:54:45,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:54:45,592 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-11-06 18:54:45,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 18:54:45,592 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-11-06 18:54:45,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:54:45,593 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:54:45,593 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:54:45,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:54:45,806 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:54:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:54:45,807 INFO L82 PathProgramCache]: Analyzing trace with hash 783487204, now seen corresponding path program 3 times [2019-11-06 18:54:45,807 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:54:45,808 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870936763] [2019-11-06 18:54:45,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:54:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:54:45,897 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870936763] [2019-11-06 18:54:45,897 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094126748] [2019-11-06 18:54:45,897 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:54:45,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:54:45,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:54:45,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:54:45,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:54:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:54:46,029 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:54:46,029 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2019-11-06 18:54:46,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776211897] [2019-11-06 18:54:46,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:54:46,031 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:54:46,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:54:46,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:54:46,031 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 13 states. [2019-11-06 18:54:46,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:54:46,284 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2019-11-06 18:54:46,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:54:46,284 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2019-11-06 18:54:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:54:46,286 INFO L225 Difference]: With dead ends: 102 [2019-11-06 18:54:46,286 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 18:54:46,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:54:46,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 18:54:46,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2019-11-06 18:54:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 18:54:46,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-11-06 18:54:46,296 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2019-11-06 18:54:46,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:54:46,297 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-11-06 18:54:46,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:54:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-11-06 18:54:46,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:54:46,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:54:46,298 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:54:46,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:54:46,503 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:54:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:54:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1309226143, now seen corresponding path program 4 times [2019-11-06 18:54:46,503 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:54:46,504 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550317655] [2019-11-06 18:54:46,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:54:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:54:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:54:46,726 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550317655] [2019-11-06 18:54:46,726 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592427472] [2019-11-06 18:54:46,726 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:54:46,777 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:54:46,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:54:46,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:54:46,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:54:46,860 INFO L375 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 [2019-11-06 18:54:46,860 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:46,865 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:46,866 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:54:46,866 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2019-11-06 18:54:47,117 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-11-06 18:54:47,118 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:54:47,120 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:54:47,120 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:54:47,121 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2019-11-06 18:54:47,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:54:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:54:47,183 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:54:47,183 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2019-11-06 18:54:47,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201804754] [2019-11-06 18:54:47,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:54:47,184 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:54:47,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:54:47,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:54:47,185 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 27 states.