/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-multidimensional/max-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:50:41,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:50:41,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:50:41,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:50:41,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:50:41,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:50:41,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:50:41,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:50:41,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:50:41,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:50:41,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:50:41,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:50:41,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:50:41,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:50:41,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:50:41,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:50:41,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:50:41,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:50:41,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:50:41,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:50:41,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:50:41,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:50:41,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:50:41,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:50:41,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:50:41,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:50:41,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:50:41,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:50:41,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:50:41,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:50:41,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:50:41,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:50:41,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:50:41,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:50:41,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:50:41,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:50:41,436 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 18:50:41,451 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:50:41,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:50:41,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:50:41,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:50:41,452 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:50:41,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:50:41,453 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:50:41,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:50:41,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:50:41,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:50:41,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:50:41,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:50:41,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:50:41,454 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:50:41,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:50:41,454 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:50:41,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:50:41,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:50:41,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:50:41,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:50:41,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:50:41,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:50:41,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:50:41,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:50:41,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:50:41,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:50:41,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:50:41,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:50:41,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:50:41,717 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:50:41,737 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:50:41,741 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:50:41,743 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:50:41,743 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:50:41,744 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/max-2-u.c [2019-11-06 18:50:41,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a128e17/b0e1ade8e28a464c9e75572e2d60dfaf/FLAG2e5f9dcd3 [2019-11-06 18:50:42,274 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:50:42,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/max-2-u.c [2019-11-06 18:50:42,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a128e17/b0e1ade8e28a464c9e75572e2d60dfaf/FLAG2e5f9dcd3 [2019-11-06 18:50:42,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03a128e17/b0e1ade8e28a464c9e75572e2d60dfaf [2019-11-06 18:50:42,669 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:50:42,671 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:50:42,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:50:42,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:50:42,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:50:42,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:50:42" (1/1) ... [2019-11-06 18:50:42,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d8125c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:42, skipping insertion in model container [2019-11-06 18:50:42,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:50:42" (1/1) ... [2019-11-06 18:50:42,687 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:50:42,706 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:50:42,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:50:42,887 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:50:42,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:50:43,015 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:50:43,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:43 WrapperNode [2019-11-06 18:50:43,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:50:43,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:50:43,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:50:43,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:50:43,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:43" (1/1) ... [2019-11-06 18:50:43,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:43" (1/1) ... [2019-11-06 18:50:43,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:43" (1/1) ... [2019-11-06 18:50:43,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:43" (1/1) ... [2019-11-06 18:50:43,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:43" (1/1) ... [2019-11-06 18:50:43,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:43" (1/1) ... [2019-11-06 18:50:43,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:43" (1/1) ... [2019-11-06 18:50:43,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:50:43,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:50:43,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:50:43,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:50:43,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:43" (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 18:50:43,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:50:43,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:50:43,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:50:43,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:50:43,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:50:43,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:50:43,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:50:43,119 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:50:43,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:50:43,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:50:43,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:50:43,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:50:43,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:50:43,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:50:43,445 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:50:43,445 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 18:50:43,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:43 BoogieIcfgContainer [2019-11-06 18:50:43,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:50:43,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:50:43,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:50:43,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:50:43,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:50:42" (1/3) ... [2019-11-06 18:50:43,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e15b1e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:43, skipping insertion in model container [2019-11-06 18:50:43,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:43" (2/3) ... [2019-11-06 18:50:43,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e15b1e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:43, skipping insertion in model container [2019-11-06 18:50:43,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:43" (3/3) ... [2019-11-06 18:50:43,456 INFO L109 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2019-11-06 18:50:43,466 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:50:43,474 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:50:43,486 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:50:43,517 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:50:43,517 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:50:43,517 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:50:43,517 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:50:43,518 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:50:43,518 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:50:43,518 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:50:43,518 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:50:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-06 18:50:43,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:50:43,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:43,542 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:43,543 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:43,548 INFO L82 PathProgramCache]: Analyzing trace with hash 659715076, now seen corresponding path program 1 times [2019-11-06 18:50:43,554 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:43,554 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77803473] [2019-11-06 18:50:43,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:43,627 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:43,628 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105506564] [2019-11-06 18:50:43,628 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 18:50:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:43,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:43,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:43,750 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 18:50:43,751 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77803473] [2019-11-06 18:50:43,751 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:43,752 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105506564] [2019-11-06 18:50:43,753 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:43,753 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:50:43,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674104432] [2019-11-06 18:50:43,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:50:43,759 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:43,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:50:43,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:50:43,777 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-11-06 18:50:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:43,859 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2019-11-06 18:50:43,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:50:43,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-06 18:50:43,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:43,870 INFO L225 Difference]: With dead ends: 61 [2019-11-06 18:50:43,870 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:50:43,874 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 18:50:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:50:43,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-11-06 18:50:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:50:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-06 18:50:43,922 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-11-06 18:50:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:43,923 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-06 18:50:43,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:50:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-06 18:50:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:50:43,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:43,924 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:44,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:44,129 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:44,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:44,129 INFO L82 PathProgramCache]: Analyzing trace with hash -528988062, now seen corresponding path program 1 times [2019-11-06 18:50:44,130 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:44,131 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71998051] [2019-11-06 18:50:44,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:44,142 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:44,142 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340260140] [2019-11-06 18:50:44,143 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 18:50:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:44,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:44,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:44,255 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 18:50:44,256 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71998051] [2019-11-06 18:50:44,256 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:44,256 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340260140] [2019-11-06 18:50:44,256 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:44,261 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:50:44,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846309679] [2019-11-06 18:50:44,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:44,265 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:44,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:44,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:44,266 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-11-06 18:50:44,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:44,347 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2019-11-06 18:50:44,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:44,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-06 18:50:44,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:44,350 INFO L225 Difference]: With dead ends: 59 [2019-11-06 18:50:44,350 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 18:50:44,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 18:50:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2019-11-06 18:50:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 18:50:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-11-06 18:50:44,363 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2019-11-06 18:50:44,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:44,364 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-11-06 18:50:44,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-11-06 18:50:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:50:44,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:44,365 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:44,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:44,569 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:44,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:44,570 INFO L82 PathProgramCache]: Analyzing trace with hash -306641421, now seen corresponding path program 1 times [2019-11-06 18:50:44,570 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:44,570 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077498573] [2019-11-06 18:50:44,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:44,579 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:44,580 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336321717] [2019-11-06 18:50:44,580 INFO L94 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 [2019-11-06 18:50:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:44,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:50:44,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:44,677 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077498573] [2019-11-06 18:50:44,677 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:44,677 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336321717] [2019-11-06 18:50:44,677 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:44,678 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:50:44,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348740457] [2019-11-06 18:50:44,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:50:44,679 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:44,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:50:44,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:44,680 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2019-11-06 18:50:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:44,824 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2019-11-06 18:50:44,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:50:44,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-06 18:50:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:44,827 INFO L225 Difference]: With dead ends: 69 [2019-11-06 18:50:44,827 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:50:44,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:50:44,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2019-11-06 18:50:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 18:50:44,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-11-06 18:50:44,851 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 20 [2019-11-06 18:50:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:44,852 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-11-06 18:50:44,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:50:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-11-06 18:50:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:50:44,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:44,853 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:45,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:45,065 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:45,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2003830142, now seen corresponding path program 2 times [2019-11-06 18:50:45,066 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:45,067 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135635511] [2019-11-06 18:50:45,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:45,075 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:45,075 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819873983] [2019-11-06 18:50:45,075 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 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 18:50:45,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 18:50:45,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:45,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:45,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:50:45,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135635511] [2019-11-06 18:50:45,173 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:45,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819873983] [2019-11-06 18:50:45,174 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:45,174 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:50:45,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463951336] [2019-11-06 18:50:45,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:45,175 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:45,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:45,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:45,176 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2019-11-06 18:50:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:45,255 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-11-06 18:50:45,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:45,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-06 18:50:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:45,257 INFO L225 Difference]: With dead ends: 76 [2019-11-06 18:50:45,257 INFO L226 Difference]: Without dead ends: 60 [2019-11-06 18:50:45,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:45,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-06 18:50:45,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2019-11-06 18:50:45,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:50:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-11-06 18:50:45,268 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 21 [2019-11-06 18:50:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:45,268 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-11-06 18:50:45,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-11-06 18:50:45,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:50:45,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:45,269 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:45,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:45,473 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash -851590433, now seen corresponding path program 1 times [2019-11-06 18:50:45,474 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:45,474 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908524595] [2019-11-06 18:50:45,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:45,481 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:45,481 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331483936] [2019-11-06 18:50:45,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:50:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:45,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:50:45,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:50:45,563 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908524595] [2019-11-06 18:50:45,563 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:45,563 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331483936] [2019-11-06 18:50:45,563 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:45,563 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 18:50:45,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399305873] [2019-11-06 18:50:45,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:50:45,564 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:45,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:50:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:50:45,565 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2019-11-06 18:50:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:45,697 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2019-11-06 18:50:45,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:50:45,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-06 18:50:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:45,700 INFO L225 Difference]: With dead ends: 83 [2019-11-06 18:50:45,700 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:50:45,704 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:50:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:50:45,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2019-11-06 18:50:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:50:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-11-06 18:50:45,725 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 30 [2019-11-06 18:50:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:45,725 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-11-06 18:50:45,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:50:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-11-06 18:50:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:50:45,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:45,730 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:45,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:45,931 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:45,931 INFO L82 PathProgramCache]: Analyzing trace with hash -241858451, now seen corresponding path program 2 times [2019-11-06 18:50:45,931 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:45,931 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183233099] [2019-11-06 18:50:45,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:45,938 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:45,939 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130813061] [2019-11-06 18:50:45,939 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:46,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:50:46,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:46,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:50:46,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:50:46,068 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183233099] [2019-11-06 18:50:46,068 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:46,069 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130813061] [2019-11-06 18:50:46,069 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:46,069 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 18:50:46,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136673850] [2019-11-06 18:50:46,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:50:46,070 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:46,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:50:46,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:50:46,070 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 7 states. [2019-11-06 18:50:46,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:46,186 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2019-11-06 18:50:46,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:50:46,187 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-11-06 18:50:46,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:46,188 INFO L225 Difference]: With dead ends: 97 [2019-11-06 18:50:46,188 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 18:50:46,189 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:50:46,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 18:50:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2019-11-06 18:50:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:50:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-11-06 18:50:46,206 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 34 [2019-11-06 18:50:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:46,208 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-11-06 18:50:46,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:50:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-11-06 18:50:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:50:46,210 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:46,210 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:46,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:46,416 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash -123740257, now seen corresponding path program 3 times [2019-11-06 18:50:46,418 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:46,418 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978285357] [2019-11-06 18:50:46,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:46,428 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:46,428 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088955957] [2019-11-06 18:50:46,428 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 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 [2019-11-06 18:50:46,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 18:50:46,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:46,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:50:46,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 18:50:46,499 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978285357] [2019-11-06 18:50:46,499 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:46,499 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088955957] [2019-11-06 18:50:46,499 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:46,500 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-06 18:50:46,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488755848] [2019-11-06 18:50:46,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:46,502 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:46,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:46,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:46,503 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 4 states. [2019-11-06 18:50:46,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:46,562 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2019-11-06 18:50:46,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:46,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-11-06 18:50:46,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:46,563 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:50:46,563 INFO L226 Difference]: Without dead ends: 66 [2019-11-06 18:50:46,564 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-06 18:50:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2019-11-06 18:50:46,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-06 18:50:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2019-11-06 18:50:46,575 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 38 [2019-11-06 18:50:46,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:46,575 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2019-11-06 18:50:46,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2019-11-06 18:50:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:50:46,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:46,577 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:46,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:46,781 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:46,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:46,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1198106045, now seen corresponding path program 4 times [2019-11-06 18:50:46,783 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:46,783 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598919323] [2019-11-06 18:50:46,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:46,791 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:46,792 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333177932] [2019-11-06 18:50:46,792 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 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 [2019-11-06 18:50:46,847 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:50:46,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:46,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:50:46,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-06 18:50:46,940 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598919323] [2019-11-06 18:50:46,940 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:46,940 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333177932] [2019-11-06 18:50:46,941 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:46,941 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 18:50:46,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675861794] [2019-11-06 18:50:46,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:50:46,942 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:46,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:50:46,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:50:46,942 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 9 states. [2019-11-06 18:50:47,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:47,161 INFO L93 Difference]: Finished difference Result 147 states and 186 transitions. [2019-11-06 18:50:47,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:50:47,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-11-06 18:50:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:47,162 INFO L225 Difference]: With dead ends: 147 [2019-11-06 18:50:47,163 INFO L226 Difference]: Without dead ends: 125 [2019-11-06 18:50:47,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:50:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-06 18:50:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2019-11-06 18:50:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 18:50:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2019-11-06 18:50:47,182 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 45 [2019-11-06 18:50:47,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:47,182 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2019-11-06 18:50:47,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:50:47,182 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2019-11-06 18:50:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 18:50:47,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:47,192 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:47,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:47,400 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:47,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:47,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1312433444, now seen corresponding path program 5 times [2019-11-06 18:50:47,401 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:47,401 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680881438] [2019-11-06 18:50:47,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:47,410 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:47,410 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317038761] [2019-11-06 18:50:47,411 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:30,797 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-06 18:51:30,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:30,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:51:30,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-06 18:51:30,895 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680881438] [2019-11-06 18:51:30,896 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:30,896 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317038761] [2019-11-06 18:51:30,896 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:30,897 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 18:51:30,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771930889] [2019-11-06 18:51:30,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:51:30,899 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:30,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:51:30,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:51:30,899 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand 8 states. [2019-11-06 18:51:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:31,022 INFO L93 Difference]: Finished difference Result 156 states and 202 transitions. [2019-11-06 18:51:31,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:51:31,023 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2019-11-06 18:51:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:31,024 INFO L225 Difference]: With dead ends: 156 [2019-11-06 18:51:31,024 INFO L226 Difference]: Without dead ends: 93 [2019-11-06 18:51:31,025 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:51:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-06 18:51:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2019-11-06 18:51:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-06 18:51:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2019-11-06 18:51:31,036 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 60 [2019-11-06 18:51:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:31,037 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2019-11-06 18:51:31,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:51:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2019-11-06 18:51:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-06 18:51:31,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:31,038 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:31,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:31,240 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:31,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:31,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1510466474, now seen corresponding path program 6 times [2019-11-06 18:51:31,241 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:31,241 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422780062] [2019-11-06 18:51:31,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:31,247 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:31,248 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774679513] [2019-11-06 18:51:31,248 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:51:31,291 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 18:51:31,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:31,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:51:31,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-06 18:51:31,352 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422780062] [2019-11-06 18:51:31,352 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:31,353 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774679513] [2019-11-06 18:51:31,353 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:31,353 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 18:51:31,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908956344] [2019-11-06 18:51:31,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:51:31,354 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:31,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:51:31,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:51:31,354 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand 6 states. [2019-11-06 18:51:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:31,473 INFO L93 Difference]: Finished difference Result 216 states and 276 transitions. [2019-11-06 18:51:31,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:51:31,473 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2019-11-06 18:51:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:31,475 INFO L225 Difference]: With dead ends: 216 [2019-11-06 18:51:31,475 INFO L226 Difference]: Without dead ends: 191 [2019-11-06 18:51:31,477 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:51:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-06 18:51:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 104. [2019-11-06 18:51:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-06 18:51:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 131 transitions. [2019-11-06 18:51:31,508 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 131 transitions. Word has length 68 [2019-11-06 18:51:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:31,509 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 131 transitions. [2019-11-06 18:51:31,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:51:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 131 transitions. [2019-11-06 18:51:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-06 18:51:31,514 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:31,515 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:31,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:31,718 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:31,718 INFO L82 PathProgramCache]: Analyzing trace with hash -155354480, now seen corresponding path program 7 times [2019-11-06 18:51:31,718 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:31,718 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440245053] [2019-11-06 18:51:31,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:31,724 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:31,725 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822537413] [2019-11-06 18:51:31,725 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-06 18:51:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:31,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:51:31,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2019-11-06 18:51:31,870 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440245053] [2019-11-06 18:51:31,871 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:31,871 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822537413] [2019-11-06 18:51:31,871 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:31,871 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 18:51:31,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853619213] [2019-11-06 18:51:31,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:51:31,872 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:31,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:51:31,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:51:31,873 INFO L87 Difference]: Start difference. First operand 104 states and 131 transitions. Second operand 9 states. [2019-11-06 18:51:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:31,993 INFO L93 Difference]: Finished difference Result 218 states and 285 transitions. [2019-11-06 18:51:31,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:51:31,993 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2019-11-06 18:51:31,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:31,994 INFO L225 Difference]: With dead ends: 218 [2019-11-06 18:51:31,994 INFO L226 Difference]: Without dead ends: 127 [2019-11-06 18:51:31,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:51:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-06 18:51:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2019-11-06 18:51:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-06 18:51:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2019-11-06 18:51:32,006 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 86 [2019-11-06 18:51:32,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:32,007 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2019-11-06 18:51:32,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:51:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2019-11-06 18:51:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 18:51:32,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:32,008 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:32,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:32,213 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:32,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:32,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1646989565, now seen corresponding path program 8 times [2019-11-06 18:51:32,213 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:32,214 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652686104] [2019-11-06 18:51:32,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:32,221 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:32,222 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026704189] [2019-11-06 18:51:32,222 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:32,292 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:51:32,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:32,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:51:32,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2019-11-06 18:51:32,386 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652686104] [2019-11-06 18:51:32,386 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:32,386 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026704189] [2019-11-06 18:51:32,387 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:32,387 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 18:51:32,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531897125] [2019-11-06 18:51:32,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:51:32,388 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:32,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:51:32,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:51:32,388 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand 10 states. [2019-11-06 18:51:32,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:32,546 INFO L93 Difference]: Finished difference Result 245 states and 320 transitions. [2019-11-06 18:51:32,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:51:32,547 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2019-11-06 18:51:32,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:32,548 INFO L225 Difference]: With dead ends: 245 [2019-11-06 18:51:32,548 INFO L226 Difference]: Without dead ends: 141 [2019-11-06 18:51:32,549 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:51:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-06 18:51:32,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2019-11-06 18:51:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-06 18:51:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 167 transitions. [2019-11-06 18:51:32,561 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 167 transitions. Word has length 97 [2019-11-06 18:51:32,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:32,562 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 167 transitions. [2019-11-06 18:51:32,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:51:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 167 transitions. [2019-11-06 18:51:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-06 18:51:32,563 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:32,563 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:32,767 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:32,768 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:32,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:32,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1261139824, now seen corresponding path program 9 times [2019-11-06 18:51:32,768 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:32,769 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312454235] [2019-11-06 18:51:32,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:32,778 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:32,778 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717458062] [2019-11-06 18:51:32,779 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 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 [2019-11-06 18:51:32,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:51:32,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:32,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:51:32,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:32,920 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 15 treesize of output 7 [2019-11-06 18:51:32,921 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:51:32,924 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:51:32,924 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 18:51:32,924 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-06 18:51:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-11-06 18:51:32,949 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312454235] [2019-11-06 18:51:32,950 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:32,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717458062] [2019-11-06 18:51:32,953 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:51:32,953 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 18:51:32,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835448388] [2019-11-06 18:51:32,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:51:32,954 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:32,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:51:32,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:51:32,955 INFO L87 Difference]: Start difference. First operand 132 states and 167 transitions. Second operand 6 states. [2019-11-06 18:51:33,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:33,027 INFO L93 Difference]: Finished difference Result 251 states and 323 transitions. [2019-11-06 18:51:33,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:51:33,027 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-11-06 18:51:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:33,029 INFO L225 Difference]: With dead ends: 251 [2019-11-06 18:51:33,029 INFO L226 Difference]: Without dead ends: 150 [2019-11-06 18:51:33,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:51:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-06 18:51:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 132. [2019-11-06 18:51:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-06 18:51:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 166 transitions. [2019-11-06 18:51:33,043 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 166 transitions. Word has length 108 [2019-11-06 18:51:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:33,045 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 166 transitions. [2019-11-06 18:51:33,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:51:33,046 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 166 transitions. [2019-11-06 18:51:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-06 18:51:33,047 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:33,047 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:33,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:33,251 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:33,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:33,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2100173486, now seen corresponding path program 1 times [2019-11-06 18:51:33,252 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:33,252 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103809763] [2019-11-06 18:51:33,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:33,259 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:33,259 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245066939] [2019-11-06 18:51:33,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:33,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:51:33,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2019-11-06 18:51:33,462 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103809763] [2019-11-06 18:51:33,463 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:33,463 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245066939] [2019-11-06 18:51:33,463 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:33,463 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 18:51:33,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262196944] [2019-11-06 18:51:33,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:51:33,464 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:33,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:51:33,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:51:33,465 INFO L87 Difference]: Start difference. First operand 132 states and 166 transitions. Second operand 11 states. [2019-11-06 18:51:33,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:33,648 INFO L93 Difference]: Finished difference Result 272 states and 353 transitions. [2019-11-06 18:51:33,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:51:33,648 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2019-11-06 18:51:33,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:33,650 INFO L225 Difference]: With dead ends: 272 [2019-11-06 18:51:33,650 INFO L226 Difference]: Without dead ends: 155 [2019-11-06 18:51:33,651 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:51:33,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-11-06 18:51:33,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2019-11-06 18:51:33,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-06 18:51:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2019-11-06 18:51:33,666 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 108 [2019-11-06 18:51:33,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:33,666 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2019-11-06 18:51:33,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:51:33,666 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2019-11-06 18:51:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 18:51:33,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:33,668 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 23, 16, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:33,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:33,872 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:33,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:33,872 INFO L82 PathProgramCache]: Analyzing trace with hash 225026463, now seen corresponding path program 2 times [2019-11-06 18:51:33,873 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:33,873 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701941063] [2019-11-06 18:51:33,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:33,882 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:33,882 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475574783] [2019-11-06 18:51:33,882 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 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 [2019-11-06 18:51:33,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:51:33,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:33,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:51:33,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 83 proven. 36 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-11-06 18:51:34,114 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701941063] [2019-11-06 18:51:34,115 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:34,115 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475574783] [2019-11-06 18:51:34,115 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:34,115 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-06 18:51:34,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383030059] [2019-11-06 18:51:34,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:51:34,116 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:34,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:51:34,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:51:34,117 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand 12 states. [2019-11-06 18:51:34,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:34,349 INFO L93 Difference]: Finished difference Result 299 states and 388 transitions. [2019-11-06 18:51:34,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:51:34,349 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 119 [2019-11-06 18:51:34,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:34,351 INFO L225 Difference]: With dead ends: 299 [2019-11-06 18:51:34,352 INFO L226 Difference]: Without dead ends: 169 [2019-11-06 18:51:34,352 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:51:34,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-11-06 18:51:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 160. [2019-11-06 18:51:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-06 18:51:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2019-11-06 18:51:34,371 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 119 [2019-11-06 18:51:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:34,371 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2019-11-06 18:51:34,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:51:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2019-11-06 18:51:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 18:51:34,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:34,373 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 26, 18, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:34,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:34,576 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:34,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:34,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1333730318, now seen corresponding path program 3 times [2019-11-06 18:51:34,577 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:34,577 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130003479] [2019-11-06 18:51:34,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:34,588 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:34,589 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934883057] [2019-11-06 18:51:34,589 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 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 [2019-11-06 18:51:35,704 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-06 18:51:35,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:35,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:51:35,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 103 proven. 45 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [2019-11-06 18:51:35,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130003479] [2019-11-06 18:51:35,846 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:35,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934883057] [2019-11-06 18:51:35,846 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:35,846 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-06 18:51:35,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406736013] [2019-11-06 18:51:35,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:51:35,847 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:35,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:51:35,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:51:35,847 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand 13 states. [2019-11-06 18:51:36,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:36,100 INFO L93 Difference]: Finished difference Result 326 states and 423 transitions. [2019-11-06 18:51:36,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:51:36,101 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 130 [2019-11-06 18:51:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:36,102 INFO L225 Difference]: With dead ends: 326 [2019-11-06 18:51:36,102 INFO L226 Difference]: Without dead ends: 183 [2019-11-06 18:51:36,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:51:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-11-06 18:51:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 174. [2019-11-06 18:51:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-06 18:51:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 220 transitions. [2019-11-06 18:51:36,119 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 220 transitions. Word has length 130 [2019-11-06 18:51:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:36,119 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 220 transitions. [2019-11-06 18:51:36,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:51:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 220 transitions. [2019-11-06 18:51:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 18:51:36,121 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:36,121 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 20, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]