/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/nla-digbench/bresenham.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:25:34,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:25:34,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:25:34,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:25:34,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:25:34,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:25:34,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:25:34,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:25:34,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:25:34,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:25:34,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:25:34,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-06 21:25:34,887 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 21:25:34,920 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:25:34,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:25:34,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:25:34,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:25:34,926 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:25:34,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:25:34,926 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:25:34,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:25:34,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:25:34,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:25:34,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:25:34,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:25:34,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:25:34,927 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:25:34,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:25:34,930 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:25:34,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:25:34,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:25:34,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:25:34,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:25:34,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:25:34,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:25:34,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:25:34,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:25:34,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:25:34,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:25:34,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:25:34,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:25:34,935 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:25:35,225 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:25:35,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:25:35,249 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:25:35,250 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:25:35,251 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:25:35,252 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/bresenham.c [2019-11-06 21:25:35,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/923c2f8d1/e39bc4bb616c41708892ab9ddadae9cb/FLAG0ba67e662 [2019-11-06 21:25:35,767 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:25:35,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/bresenham.c [2019-11-06 21:25:35,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/923c2f8d1/e39bc4bb616c41708892ab9ddadae9cb/FLAG0ba67e662 [2019-11-06 21:25:36,149 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/923c2f8d1/e39bc4bb616c41708892ab9ddadae9cb [2019-11-06 21:25:36,159 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:25:36,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:25:36,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:25:36,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:25:36,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:25:36,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:25:36" (1/1) ... [2019-11-06 21:25:36,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1172a0d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:36, skipping insertion in model container [2019-11-06 21:25:36,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:25:36" (1/1) ... [2019-11-06 21:25:36,180 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:25:36,202 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:25:36,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:25:36,375 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:25:36,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:25:36,409 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:25:36,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:36 WrapperNode [2019-11-06 21:25:36,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:25:36,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:25:36,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:25:36,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:25:36,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:36" (1/1) ... [2019-11-06 21:25:36,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:36" (1/1) ... [2019-11-06 21:25:36,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:36" (1/1) ... [2019-11-06 21:25:36,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:36" (1/1) ... [2019-11-06 21:25:36,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:36" (1/1) ... [2019-11-06 21:25:36,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:36" (1/1) ... [2019-11-06 21:25:36,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:36" (1/1) ... [2019-11-06 21:25:36,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:25:36,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:25:36,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:25:36,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:25:36,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:36" (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 21:25:36,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:25:36,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:25:36,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:25:36,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:25:36,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:25:36,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:25:36,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 21:25:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:25:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:25:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:25:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:25:36,807 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:25:36,807 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:25:36,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:25:36 BoogieIcfgContainer [2019-11-06 21:25:36,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:25:36,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:25:36,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:25:36,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:25:36,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:25:36" (1/3) ... [2019-11-06 21:25:36,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc4cf23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:25:36, skipping insertion in model container [2019-11-06 21:25:36,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:36" (2/3) ... [2019-11-06 21:25:36,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc4cf23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:25:36, skipping insertion in model container [2019-11-06 21:25:36,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:25:36" (3/3) ... [2019-11-06 21:25:36,831 INFO L109 eAbstractionObserver]: Analyzing ICFG bresenham.c [2019-11-06 21:25:36,854 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:25:36,863 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:25:36,896 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:25:36,922 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:25:36,923 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:25:36,923 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:25:36,923 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:25:36,923 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:25:36,923 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:25:36,923 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:25:36,924 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:25:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-06 21:25:36,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:25:36,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:36,945 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:36,947 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:36,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:36,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1560104174, now seen corresponding path program 1 times [2019-11-06 21:25:36,961 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:36,961 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440604180] [2019-11-06 21:25:36,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:37,056 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440604180] [2019-11-06 21:25:37,056 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:25:37,057 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 21:25:37,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523223586] [2019-11-06 21:25:37,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 21:25:37,062 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:37,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 21:25:37,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:25:37,076 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-11-06 21:25:37,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:37,098 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-11-06 21:25:37,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 21:25:37,100 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-06 21:25:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:37,109 INFO L225 Difference]: With dead ends: 39 [2019-11-06 21:25:37,109 INFO L226 Difference]: Without dead ends: 17 [2019-11-06 21:25:37,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:25:37,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-06 21:25:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-06 21:25:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-06 21:25:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-06 21:25:37,157 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2019-11-06 21:25:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:37,157 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-06 21:25:37,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 21:25:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-06 21:25:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:25:37,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:37,158 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:37,159 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:37,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:37,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1561891634, now seen corresponding path program 1 times [2019-11-06 21:25:37,160 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:37,160 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625790424] [2019-11-06 21:25:37,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:37,170 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:37,170 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578090042] [2019-11-06 21:25:37,170 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 21:25:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:37,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 21:25:37,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:37,354 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 21:25:37,356 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625790424] [2019-11-06 21:25:37,356 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:37,356 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578090042] [2019-11-06 21:25:37,357 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:25:37,357 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 21:25:37,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695257067] [2019-11-06 21:25:37,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:25:37,360 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:37,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:25:37,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:25:37,362 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2019-11-06 21:25:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:37,467 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-11-06 21:25:37,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:25:37,468 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-06 21:25:37,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:37,470 INFO L225 Difference]: With dead ends: 28 [2019-11-06 21:25:37,470 INFO L226 Difference]: Without dead ends: 25 [2019-11-06 21:25:37,471 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:25:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-06 21:25:37,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-06 21:25:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 21:25:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-06 21:25:37,480 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2019-11-06 21:25:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:37,481 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-06 21:25:37,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:25:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-06 21:25:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 21:25:37,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:37,483 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:37,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:37,688 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:37,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1038075816, now seen corresponding path program 1 times [2019-11-06 21:25:37,689 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:37,689 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660958356] [2019-11-06 21:25:37,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:37,701 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:37,701 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871674043] [2019-11-06 21:25:37,701 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 21:25:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:37,745 WARN L254 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 21:25:37,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:37,884 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660958356] [2019-11-06 21:25:37,884 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:37,884 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871674043] [2019-11-06 21:25:37,885 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:37,885 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:25:37,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681857095] [2019-11-06 21:25:37,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:25:37,886 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:37,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:25:37,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:25:37,887 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 9 states. [2019-11-06 21:25:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:38,056 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-11-06 21:25:38,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:25:38,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-11-06 21:25:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:38,058 INFO L225 Difference]: With dead ends: 37 [2019-11-06 21:25:38,058 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 21:25:38,059 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 21:25:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-06 21:25:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 21:25:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-11-06 21:25:38,068 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2019-11-06 21:25:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:38,069 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-11-06 21:25:38,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:25:38,069 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-11-06 21:25:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 21:25:38,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:38,070 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:38,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:38,275 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:38,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:38,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1481884118, now seen corresponding path program 1 times [2019-11-06 21:25:38,275 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:38,276 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468365015] [2019-11-06 21:25:38,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:38,282 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:38,282 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22724579] [2019-11-06 21:25:38,282 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) [2019-11-06 21:25:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:38,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:25:38,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:38,427 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468365015] [2019-11-06 21:25:38,428 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:38,428 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22724579] [2019-11-06 21:25:38,428 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:38,428 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:25:38,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044163227] [2019-11-06 21:25:38,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:25:38,429 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:38,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:25:38,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:25:38,430 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2019-11-06 21:25:38,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:38,588 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-11-06 21:25:38,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:25:38,590 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-11-06 21:25:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:38,591 INFO L225 Difference]: With dead ends: 45 [2019-11-06 21:25:38,591 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 21:25:38,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:38,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 21:25:38,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-11-06 21:25:38,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 21:25:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-11-06 21:25:38,605 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 19 [2019-11-06 21:25:38,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:38,605 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-11-06 21:25:38,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:25:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-11-06 21:25:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 21:25:38,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:38,607 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:38,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:38,811 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:38,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:38,812 INFO L82 PathProgramCache]: Analyzing trace with hash 190103611, now seen corresponding path program 1 times [2019-11-06 21:25:38,813 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:38,813 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282496650] [2019-11-06 21:25:38,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:38,819 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:38,820 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473484818] [2019-11-06 21:25:38,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:38,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 21:25:38,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:39,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:25:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:25:39,064 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282496650] [2019-11-06 21:25:39,064 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:39,065 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473484818] [2019-11-06 21:25:39,065 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:39,065 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-06 21:25:39,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432221335] [2019-11-06 21:25:39,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:25:39,066 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:39,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:25:39,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:25:39,067 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 12 states. [2019-11-06 21:25:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:39,246 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2019-11-06 21:25:39,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 21:25:39,247 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2019-11-06 21:25:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:39,248 INFO L225 Difference]: With dead ends: 50 [2019-11-06 21:25:39,249 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 21:25:39,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:25:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 21:25:39,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2019-11-06 21:25:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 21:25:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-11-06 21:25:39,264 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 25 [2019-11-06 21:25:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:39,264 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-11-06 21:25:39,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:25:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-11-06 21:25:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:25:39,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:39,268 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:39,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:39,469 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:39,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:39,469 INFO L82 PathProgramCache]: Analyzing trace with hash -775079950, now seen corresponding path program 2 times [2019-11-06 21:25:39,470 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:39,470 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122799067] [2019-11-06 21:25:39,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:39,475 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:39,476 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550168079] [2019-11-06 21:25:39,476 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 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 21:25:39,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:39,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:39,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 21:25:39,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:25:39,654 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122799067] [2019-11-06 21:25:39,654 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:39,655 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550168079] [2019-11-06 21:25:39,655 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:39,655 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 21:25:39,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972449099] [2019-11-06 21:25:39,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:25:39,656 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:39,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:25:39,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:39,657 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2019-11-06 21:25:39,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:39,854 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2019-11-06 21:25:39,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:25:39,855 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-11-06 21:25:39,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:39,856 INFO L225 Difference]: With dead ends: 54 [2019-11-06 21:25:39,856 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 21:25:39,857 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:25:39,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 21:25:39,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2019-11-06 21:25:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 21:25:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-06 21:25:39,865 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 28 [2019-11-06 21:25:39,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:39,865 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-06 21:25:39,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:25:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-06 21:25:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:25:39,866 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:39,866 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:40,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:40,070 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:40,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:40,070 INFO L82 PathProgramCache]: Analyzing trace with hash 999927412, now seen corresponding path program 1 times [2019-11-06 21:25:40,070 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:40,071 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186554314] [2019-11-06 21:25:40,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:40,076 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:40,076 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420532707] [2019-11-06 21:25:40,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:25:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:40,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-06 21:25:40,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:25:40,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186554314] [2019-11-06 21:25:40,239 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:40,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420532707] [2019-11-06 21:25:40,239 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:40,240 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 21:25:40,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434822136] [2019-11-06 21:25:40,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:25:40,240 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:40,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:25:40,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:40,241 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 11 states. [2019-11-06 21:25:40,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:40,412 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2019-11-06 21:25:40,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:25:40,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-11-06 21:25:40,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:40,421 INFO L225 Difference]: With dead ends: 54 [2019-11-06 21:25:40,421 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 21:25:40,422 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:25:40,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 21:25:40,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-11-06 21:25:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 21:25:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-11-06 21:25:40,430 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 28 [2019-11-06 21:25:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:40,430 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-11-06 21:25:40,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:25:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-11-06 21:25:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:25:40,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:40,432 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:40,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:40,635 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:40,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:40,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1796148304, now seen corresponding path program 2 times [2019-11-06 21:25:40,636 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:40,636 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514081301] [2019-11-06 21:25:40,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:40,642 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:40,643 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386129854] [2019-11-06 21:25:40,643 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 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 21:25:40,682 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:40,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:40,683 WARN L254 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-06 21:25:40,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:25:40,805 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514081301] [2019-11-06 21:25:40,806 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:40,806 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386129854] [2019-11-06 21:25:40,806 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:40,807 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 21:25:40,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341989911] [2019-11-06 21:25:40,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:25:40,807 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:40,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:25:40,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:40,808 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 11 states. [2019-11-06 21:25:41,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:41,008 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2019-11-06 21:25:41,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:25:41,009 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-11-06 21:25:41,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:41,012 INFO L225 Difference]: With dead ends: 70 [2019-11-06 21:25:41,012 INFO L226 Difference]: Without dead ends: 68 [2019-11-06 21:25:41,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:25:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-06 21:25:41,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2019-11-06 21:25:41,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 21:25:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-11-06 21:25:41,022 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 28 [2019-11-06 21:25:41,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:41,022 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-11-06 21:25:41,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:25:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-11-06 21:25:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:25:41,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:41,024 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:41,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:41,227 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:41,228 INFO L82 PathProgramCache]: Analyzing trace with hash -21140942, now seen corresponding path program 2 times [2019-11-06 21:25:41,228 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:41,228 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007132660] [2019-11-06 21:25:41,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:41,233 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:41,234 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962993180] [2019-11-06 21:25:41,234 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 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 21:25:41,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:41,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:41,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 21:25:41,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:25:41,421 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007132660] [2019-11-06 21:25:41,422 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:41,422 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962993180] [2019-11-06 21:25:41,422 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:41,422 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 21:25:41,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283815503] [2019-11-06 21:25:41,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:25:41,424 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:41,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:25:41,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:41,425 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 11 states. [2019-11-06 21:25:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:41,611 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2019-11-06 21:25:41,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:25:41,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-11-06 21:25:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:41,613 INFO L225 Difference]: With dead ends: 70 [2019-11-06 21:25:41,613 INFO L226 Difference]: Without dead ends: 68 [2019-11-06 21:25:41,614 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:25:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-06 21:25:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2019-11-06 21:25:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 21:25:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-11-06 21:25:41,622 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 28 [2019-11-06 21:25:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:41,623 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-11-06 21:25:41,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:25:41,623 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-11-06 21:25:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 21:25:41,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:41,624 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:41,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:41,837 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:41,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:41,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1039880453, now seen corresponding path program 1 times [2019-11-06 21:25:41,838 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:41,838 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036935013] [2019-11-06 21:25:41,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:41,844 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:41,844 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454254558] [2019-11-06 21:25:41,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:41,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 21:25:41,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:25:42,024 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036935013] [2019-11-06 21:25:42,024 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:42,025 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454254558] [2019-11-06 21:25:42,025 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:42,025 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 21:25:42,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620398488] [2019-11-06 21:25:42,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:25:42,026 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:42,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:25:42,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:25:42,026 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 7 states. [2019-11-06 21:25:42,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:42,156 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2019-11-06 21:25:42,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:25:42,157 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-11-06 21:25:42,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:42,159 INFO L225 Difference]: With dead ends: 71 [2019-11-06 21:25:42,160 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 21:25:42,160 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:25:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 21:25:42,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2019-11-06 21:25:42,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 21:25:42,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2019-11-06 21:25:42,178 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 34 [2019-11-06 21:25:42,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:42,179 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2019-11-06 21:25:42,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:25:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2019-11-06 21:25:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 21:25:42,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:42,183 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:42,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:42,385 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:42,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:42,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1845541185, now seen corresponding path program 2 times [2019-11-06 21:25:42,386 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:42,386 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877182700] [2019-11-06 21:25:42,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:42,392 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:42,392 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18695761] [2019-11-06 21:25:42,392 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 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 21:25:42,429 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:42,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:42,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 21:25:42,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:25:42,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877182700] [2019-11-06 21:25:42,547 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:42,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18695761] [2019-11-06 21:25:42,550 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:42,550 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 21:25:42,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378865886] [2019-11-06 21:25:42,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:25:42,551 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:42,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:25:42,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:25:42,556 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 7 states. [2019-11-06 21:25:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:42,723 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2019-11-06 21:25:42,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:25:42,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-11-06 21:25:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:42,726 INFO L225 Difference]: With dead ends: 74 [2019-11-06 21:25:42,726 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 21:25:42,727 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:25:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 21:25:42,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2019-11-06 21:25:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 21:25:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2019-11-06 21:25:42,736 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 34 [2019-11-06 21:25:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:42,737 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2019-11-06 21:25:42,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:25:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2019-11-06 21:25:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 21:25:42,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:42,739 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:42,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:42,950 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:42,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1258735171, now seen corresponding path program 2 times [2019-11-06 21:25:42,951 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:42,951 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510414904] [2019-11-06 21:25:42,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:42,959 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:42,960 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072175288] [2019-11-06 21:25:42,960 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 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 21:25:42,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:42,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:42,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 21:25:42,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:43,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:25:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 21:25:43,228 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510414904] [2019-11-06 21:25:43,229 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:43,229 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072175288] [2019-11-06 21:25:43,229 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:43,229 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-06 21:25:43,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866822897] [2019-11-06 21:25:43,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 21:25:43,230 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:43,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 21:25:43,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:25:43,230 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 14 states. [2019-11-06 21:25:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:43,416 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2019-11-06 21:25:43,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 21:25:43,417 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-11-06 21:25:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:43,418 INFO L225 Difference]: With dead ends: 72 [2019-11-06 21:25:43,419 INFO L226 Difference]: Without dead ends: 65 [2019-11-06 21:25:43,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:25:43,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-06 21:25:43,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2019-11-06 21:25:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 21:25:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-06 21:25:43,426 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2019-11-06 21:25:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:43,426 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-06 21:25:43,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 21:25:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-06 21:25:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 21:25:43,427 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:43,427 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:43,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:43,631 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:43,632 INFO L82 PathProgramCache]: Analyzing trace with hash 389577448, now seen corresponding path program 3 times [2019-11-06 21:25:43,632 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:43,632 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983070737] [2019-11-06 21:25:43,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:43,637 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:43,637 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423872618] [2019-11-06 21:25:43,637 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 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 21:25:43,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 21:25:43,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:43,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 21:25:43,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 21:25:43,737 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983070737] [2019-11-06 21:25:43,737 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:43,737 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423872618] [2019-11-06 21:25:43,737 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:43,737 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:25:43,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794643460] [2019-11-06 21:25:43,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:25:43,738 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:43,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:25:43,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:25:43,739 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 9 states. [2019-11-06 21:25:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:43,851 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2019-11-06 21:25:43,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:25:43,852 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-11-06 21:25:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:43,853 INFO L225 Difference]: With dead ends: 71 [2019-11-06 21:25:43,853 INFO L226 Difference]: Without dead ends: 68 [2019-11-06 21:25:43,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:43,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-06 21:25:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2019-11-06 21:25:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-06 21:25:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2019-11-06 21:25:43,862 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 37 [2019-11-06 21:25:43,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:43,862 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2019-11-06 21:25:43,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:25:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2019-11-06 21:25:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 21:25:43,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:43,864 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:44,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:44,069 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:44,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:44,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2130382486, now seen corresponding path program 3 times [2019-11-06 21:25:44,070 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:44,071 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623231684] [2019-11-06 21:25:44,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:44,076 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:44,076 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825324164] [2019-11-06 21:25:44,076 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 21:25:44,112 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 21:25:44,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:44,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:25:44,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 21:25:44,191 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623231684] [2019-11-06 21:25:44,191 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:44,191 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825324164] [2019-11-06 21:25:44,192 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:44,192 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:25:44,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645315018] [2019-11-06 21:25:44,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:25:44,193 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:25:44,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:25:44,194 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 10 states. [2019-11-06 21:25:44,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:44,342 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 21:25:44,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:25:44,343 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-11-06 21:25:44,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:44,344 INFO L225 Difference]: With dead ends: 80 [2019-11-06 21:25:44,344 INFO L226 Difference]: Without dead ends: 78 [2019-11-06 21:25:44,344 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:25:44,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-06 21:25:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-11-06 21:25:44,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 21:25:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2019-11-06 21:25:44,353 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 37 [2019-11-06 21:25:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:44,354 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2019-11-06 21:25:44,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:25:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2019-11-06 21:25:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 21:25:44,355 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:44,355 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:44,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:44,559 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:44,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:44,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1143516456, now seen corresponding path program 4 times [2019-11-06 21:25:44,559 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:44,560 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425837540] [2019-11-06 21:25:44,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:44,565 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:44,565 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257514279] [2019-11-06 21:25:44,565 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 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 21:25:44,595 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:25:44,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:44,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 21:25:44,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:48,736 WARN L860 $PredicateComparison]: unable to prove that (exists ((main_~x~0 Int) (main_~y~0 Int)) (= (+ (* 6 c_main_~Y~0) (* (* c_main_~Y~0 2) main_~x~0)) (+ c_main_~v~0 (* 3 c_main_~X~0) (* (* c_main_~X~0 2) main_~y~0)))) is different from true [2019-11-06 21:25:54,816 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 27 [2019-11-06 21:25:58,873 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 29 [2019-11-06 21:26:09,539 WARN L191 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 30 [2019-11-06 21:26:09,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 5 refuted. 9 times theorem prover too weak. 6 trivial. 6 not checked. [2019-11-06 21:26:11,356 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425837540] [2019-11-06 21:26:11,356 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:11,356 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257514279] [2019-11-06 21:26:11,356 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:11,356 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-06 21:26:11,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037636772] [2019-11-06 21:26:11,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:26:11,357 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:11,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:26:11,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=81, Unknown=11, NotChecked=18, Total=132 [2019-11-06 21:26:11,358 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 12 states.