java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_mul_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:47:42,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:47:42,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:47:42,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:47:42,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:47:42,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:47:42,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:47:42,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:47:42,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:47:42,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:47:42,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:47:42,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:47:42,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:47:42,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:47:42,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:47:42,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:47:42,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:47:42,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:47:42,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:47:42,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:47:42,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:47:42,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:47:42,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:47:42,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:47:42,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:47:42,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:47:42,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:47:42,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:47:42,796 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 [2019-10-14 21:47:42,829 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:47:42,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:47:42,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:47:42,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:47:42,835 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:47:42,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:47:42,836 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:47:42,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:47:42,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:47:42,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:47:42,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:47:42,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:47:42,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:47:42,837 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:47:42,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:47:42,838 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:47:42,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:47:42,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:47:42,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:47:42,839 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:47:42,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:47:42,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:47:42,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:47:42,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:47:42,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:47:42,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:47:42,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:47:42,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:47:42,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:47:43,120 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:47:43,134 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:47:43,137 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:47:43,139 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:47:43,140 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:47:43,140 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_mul_init.i [2019-10-14 21:47:43,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23e290113/243b18ad107f4bfd947c26f44aa79a47/FLAGbfcd6b76a [2019-10-14 21:47:43,728 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:47:43,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_mul_init.i [2019-10-14 21:47:43,736 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23e290113/243b18ad107f4bfd947c26f44aa79a47/FLAGbfcd6b76a [2019-10-14 21:47:44,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23e290113/243b18ad107f4bfd947c26f44aa79a47 [2019-10-14 21:47:44,161 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:47:44,163 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:47:44,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:44,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:47:44,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:47:44,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:44" (1/1) ... [2019-10-14 21:47:44,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d890aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:44, skipping insertion in model container [2019-10-14 21:47:44,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:44" (1/1) ... [2019-10-14 21:47:44,182 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:47:44,199 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:47:44,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:44,396 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:47:44,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:44,439 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:47:44,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:44 WrapperNode [2019-10-14 21:47:44,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:44,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:47:44,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:47:44,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:47:44,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:44" (1/1) ... [2019-10-14 21:47:44,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:44" (1/1) ... [2019-10-14 21:47:44,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:44" (1/1) ... [2019-10-14 21:47:44,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:44" (1/1) ... [2019-10-14 21:47:44,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:44" (1/1) ... [2019-10-14 21:47:44,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:44" (1/1) ... [2019-10-14 21:47:44,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:44" (1/1) ... [2019-10-14 21:47:44,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:47:44,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:47:44,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:47:44,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:47:44,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:44" (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 [2019-10-14 21:47:44,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:47:44,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:47:44,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:47:44,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:47:44,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:47:44,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:47:44,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-10-14 21:47:44,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:47:44,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:47:44,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:47:44,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:47:44,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:47:44,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:47:44,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:47:44,892 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:47:44,892 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:47:44,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:44 BoogieIcfgContainer [2019-10-14 21:47:44,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:47:44,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:47:44,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:47:44,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:47:44,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:47:44" (1/3) ... [2019-10-14 21:47:44,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748e91f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:44, skipping insertion in model container [2019-10-14 21:47:44,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:44" (2/3) ... [2019-10-14 21:47:44,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748e91f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:44, skipping insertion in model container [2019-10-14 21:47:44,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:44" (3/3) ... [2019-10-14 21:47:44,903 INFO L109 eAbstractionObserver]: Analyzing ICFG array_mul_init.i [2019-10-14 21:47:44,913 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:47:44,921 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:47:44,934 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:47:44,994 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:47:44,994 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:47:44,995 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:47:44,995 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:47:44,995 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:47:44,995 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:47:44,995 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:47:44,995 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:47:45,017 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-14 21:47:45,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:47:45,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:45,026 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:45,028 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:45,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:45,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1583089931, now seen corresponding path program 1 times [2019-10-14 21:47:45,045 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:45,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352343613] [2019-10-14 21:47:45,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:45,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:45,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:45,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352343613] [2019-10-14 21:47:45,207 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:45,207 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:47:45,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538883019] [2019-10-14 21:47:45,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:47:45,213 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:45,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:47:45,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:47:45,228 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-10-14 21:47:45,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:45,340 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2019-10-14 21:47:45,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:47:45,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:47:45,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:45,353 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:47:45,353 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:47:45,359 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:47:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:47:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 21:47:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:47:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-14 21:47:45,396 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-10-14 21:47:45,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:45,397 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-14 21:47:45,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:47:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-10-14 21:47:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:47:45,398 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:45,399 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:45,399 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:45,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:45,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1899913894, now seen corresponding path program 1 times [2019-10-14 21:47:45,400 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:45,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831086846] [2019-10-14 21:47:45,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:45,401 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:45,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:45,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831086846] [2019-10-14 21:47:45,491 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:45,491 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:45,492 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146078824] [2019-10-14 21:47:45,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:45,497 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:45,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:45,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:45,499 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2019-10-14 21:47:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:45,664 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-10-14 21:47:45,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:45,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:47:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:45,668 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:47:45,669 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:47:45,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:45,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:47:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2019-10-14 21:47:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:47:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-14 21:47:45,683 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-10-14 21:47:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:45,683 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-14 21:47:45,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-14 21:47:45,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:47:45,684 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:45,685 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:45,685 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:45,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1536301701, now seen corresponding path program 1 times [2019-10-14 21:47:45,686 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:45,686 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987764999] [2019-10-14 21:47:45,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:45,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:45,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:47:45,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987764999] [2019-10-14 21:47:45,810 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:45,810 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:47:45,811 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687400823] [2019-10-14 21:47:45,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:47:45,817 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:45,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:47:45,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:47:45,818 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-10-14 21:47:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:45,987 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-14 21:47:45,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:47:45,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-10-14 21:47:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:45,990 INFO L225 Difference]: With dead ends: 34 [2019-10-14 21:47:45,990 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:47:45,991 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:47:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:47:45,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-14 21:47:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:47:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-14 21:47:45,998 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2019-10-14 21:47:45,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:45,999 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-14 21:47:45,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:47:45,999 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-14 21:47:46,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:47:46,000 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:46,001 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:46,001 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:46,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1534454659, now seen corresponding path program 1 times [2019-10-14 21:47:46,002 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:46,002 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526774220] [2019-10-14 21:47:46,002 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:46,003 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:46,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:46,026 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:46,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967149004] [2019-10-14 21:47:46,029 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 [2019-10-14 21:47:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:46,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:47:46,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:47:46,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526774220] [2019-10-14 21:47:46,143 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:46,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967149004] [2019-10-14 21:47:46,143 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:46,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-14 21:47:46,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060930341] [2019-10-14 21:47:46,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:46,145 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:46,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:46,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:46,145 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2019-10-14 21:47:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:46,233 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2019-10-14 21:47:46,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:46,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 21:47:46,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:46,237 INFO L225 Difference]: With dead ends: 73 [2019-10-14 21:47:46,238 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:47:46,238 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:47:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2019-10-14 21:47:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:47:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-10-14 21:47:46,248 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2019-10-14 21:47:46,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:46,248 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-10-14 21:47:46,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-10-14 21:47:46,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:47:46,250 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:46,250 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:46,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:46,455 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:46,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1606017140, now seen corresponding path program 2 times [2019-10-14 21:47:46,456 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:46,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142741814] [2019-10-14 21:47:46,457 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:46,457 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:46,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:46,483 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:46,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446853356] [2019-10-14 21:47:46,486 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 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 [2019-10-14 21:47:46,529 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:46,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:46,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:47:46,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:47:46,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142741814] [2019-10-14 21:47:46,579 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:46,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446853356] [2019-10-14 21:47:46,580 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:46,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:47:46,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967231309] [2019-10-14 21:47:46,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:47:46,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:46,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:47:46,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:47:46,582 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2019-10-14 21:47:46,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:46,736 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2019-10-14 21:47:46,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:47:46,739 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-10-14 21:47:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:46,742 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:47:46,742 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:47:46,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:47:46,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:47:46,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 41. [2019-10-14 21:47:46,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:47:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-10-14 21:47:46,760 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 26 [2019-10-14 21:47:46,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:46,760 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-10-14 21:47:46,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:47:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-10-14 21:47:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:47:46,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:46,764 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:46,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:46,969 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:46,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:46,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1732161177, now seen corresponding path program 3 times [2019-10-14 21:47:46,970 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:46,971 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774220783] [2019-10-14 21:47:46,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:46,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:46,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:46,996 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:46,996 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133148458] [2019-10-14 21:47:46,997 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:47,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:47:47,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:47,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:47:47,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:47:47,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774220783] [2019-10-14 21:47:47,121 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:47,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133148458] [2019-10-14 21:47:47,122 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:47,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:47:47,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157222324] [2019-10-14 21:47:47,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:47:47,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:47,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:47:47,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:47:47,126 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2019-10-14 21:47:47,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:47,329 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2019-10-14 21:47:47,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:47:47,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-10-14 21:47:47,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:47,332 INFO L225 Difference]: With dead ends: 101 [2019-10-14 21:47:47,332 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:47:47,335 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:47:47,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:47:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2019-10-14 21:47:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:47:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-10-14 21:47:47,360 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 31 [2019-10-14 21:47:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:47,360 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-10-14 21:47:47,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:47:47,360 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-10-14 21:47:47,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:47:47,363 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:47,363 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:47,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:47,571 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:47,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:47,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1392382608, now seen corresponding path program 4 times [2019-10-14 21:47:47,572 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:47,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27490826] [2019-10-14 21:47:47,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:47,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:47,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:47,594 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:47,594 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496878617] [2019-10-14 21:47:47,595 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 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 [2019-10-14 21:47:47,652 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:47,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:47,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:47:47,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:47:47,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27490826] [2019-10-14 21:47:47,717 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:47,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496878617] [2019-10-14 21:47:47,717 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:47,718 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 21:47:47,718 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381378300] [2019-10-14 21:47:47,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:47:47,719 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:47,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:47:47,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:47:47,720 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 7 states. [2019-10-14 21:47:47,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:47,866 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2019-10-14 21:47:47,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:47:47,868 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-10-14 21:47:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:47,870 INFO L225 Difference]: With dead ends: 115 [2019-10-14 21:47:47,870 INFO L226 Difference]: Without dead ends: 84 [2019-10-14 21:47:47,871 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:47:47,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-14 21:47:47,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 51. [2019-10-14 21:47:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:47:47,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2019-10-14 21:47:47,893 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 36 [2019-10-14 21:47:47,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:47,893 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2019-10-14 21:47:47,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:47:47,894 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2019-10-14 21:47:47,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:47:47,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:47,897 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:48,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:48,100 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:48,101 INFO L82 PathProgramCache]: Analyzing trace with hash 267511989, now seen corresponding path program 5 times [2019-10-14 21:47:48,101 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:48,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38072407] [2019-10-14 21:47:48,102 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:48,102 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:48,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:48,122 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:48,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338254530] [2019-10-14 21:47:48,122 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 21:47:48,205 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:47:48,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:48,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:47:48,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:47:48,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38072407] [2019-10-14 21:47:48,280 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:48,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338254530] [2019-10-14 21:47:48,281 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:48,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 21:47:48,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727964905] [2019-10-14 21:47:48,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:47:48,282 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:48,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:47:48,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:47:48,282 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 8 states. [2019-10-14 21:47:48,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:48,500 INFO L93 Difference]: Finished difference Result 129 states and 166 transitions. [2019-10-14 21:47:48,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:47:48,503 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-10-14 21:47:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:48,504 INFO L225 Difference]: With dead ends: 129 [2019-10-14 21:47:48,505 INFO L226 Difference]: Without dead ends: 95 [2019-10-14 21:47:48,509 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:47:48,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-14 21:47:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 56. [2019-10-14 21:47:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:47:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2019-10-14 21:47:48,530 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 41 [2019-10-14 21:47:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:48,531 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2019-10-14 21:47:48,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:47:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2019-10-14 21:47:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:47:48,532 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:48,532 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:48,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:48,748 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:48,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:48,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2052078420, now seen corresponding path program 6 times [2019-10-14 21:47:48,749 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:48,749 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527054993] [2019-10-14 21:47:48,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:48,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:48,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:48,769 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:48,769 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978690581] [2019-10-14 21:47:48,769 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 21:47:48,863 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:47:48,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:48,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:47:48,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 21:47:48,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527054993] [2019-10-14 21:47:48,944 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:48,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978690581] [2019-10-14 21:47:48,944 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:48,944 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 21:47:48,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986339337] [2019-10-14 21:47:48,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:47:48,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:48,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:47:48,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:47:48,949 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 9 states. [2019-10-14 21:47:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:49,149 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2019-10-14 21:47:49,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:47:49,151 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2019-10-14 21:47:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:49,152 INFO L225 Difference]: With dead ends: 143 [2019-10-14 21:47:49,152 INFO L226 Difference]: Without dead ends: 106 [2019-10-14 21:47:49,153 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:47:49,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-14 21:47:49,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 61. [2019-10-14 21:47:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:47:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2019-10-14 21:47:49,163 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 46 [2019-10-14 21:47:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:49,164 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2019-10-14 21:47:49,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:47:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2019-10-14 21:47:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:47:49,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:49,165 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:49,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:49,369 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:49,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:49,370 INFO L82 PathProgramCache]: Analyzing trace with hash -90078511, now seen corresponding path program 7 times [2019-10-14 21:47:49,370 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:49,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353813564] [2019-10-14 21:47:49,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:49,389 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:49,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535107366] [2019-10-14 21:47:49,390 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 21:47:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:47:49,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:47:49,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353813564] [2019-10-14 21:47:49,515 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:49,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535107366] [2019-10-14 21:47:49,515 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:49,515 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 21:47:49,515 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652436978] [2019-10-14 21:47:49,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:47:49,516 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:49,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:47:49,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:49,517 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 10 states. [2019-10-14 21:47:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:49,708 INFO L93 Difference]: Finished difference Result 157 states and 204 transitions. [2019-10-14 21:47:49,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:47:49,708 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2019-10-14 21:47:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:49,710 INFO L225 Difference]: With dead ends: 157 [2019-10-14 21:47:49,710 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 21:47:49,711 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 21:47:49,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 66. [2019-10-14 21:47:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 21:47:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2019-10-14 21:47:49,721 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 51 [2019-10-14 21:47:49,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:49,721 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2019-10-14 21:47:49,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:47:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2019-10-14 21:47:49,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:47:49,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:49,723 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:49,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:49,936 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:49,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:49,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1181960504, now seen corresponding path program 8 times [2019-10-14 21:47:49,936 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:49,936 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872041715] [2019-10-14 21:47:49,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:49,965 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:49,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652461993] [2019-10-14 21:47:49,965 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 [2019-10-14 21:47:50,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:50,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:50,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:47:50,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-14 21:47:50,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872041715] [2019-10-14 21:47:50,083 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:50,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652461993] [2019-10-14 21:47:50,083 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:50,083 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 21:47:50,084 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985188186] [2019-10-14 21:47:50,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:47:50,084 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:50,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:47:50,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:50,085 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 11 states. [2019-10-14 21:47:50,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:50,298 INFO L93 Difference]: Finished difference Result 171 states and 223 transitions. [2019-10-14 21:47:50,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:47:50,299 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2019-10-14 21:47:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:50,300 INFO L225 Difference]: With dead ends: 171 [2019-10-14 21:47:50,300 INFO L226 Difference]: Without dead ends: 128 [2019-10-14 21:47:50,301 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-14 21:47:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 71. [2019-10-14 21:47:50,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:47:50,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2019-10-14 21:47:50,311 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 56 [2019-10-14 21:47:50,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:50,312 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2019-10-14 21:47:50,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:47:50,312 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2019-10-14 21:47:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:47:50,313 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:50,313 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:50,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:50,526 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:50,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1976253677, now seen corresponding path program 9 times [2019-10-14 21:47:50,527 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:50,528 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681148595] [2019-10-14 21:47:50,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:50,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:50,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:50,546 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:50,547 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485459360] [2019-10-14 21:47:50,547 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 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 [2019-10-14 21:47:50,749 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 21:47:50,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:50,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:47:50,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:47:50,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681148595] [2019-10-14 21:47:50,860 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:50,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485459360] [2019-10-14 21:47:50,860 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:50,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 21:47:50,861 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32554526] [2019-10-14 21:47:50,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:47:50,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:50,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:47:50,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:47:50,862 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2019-10-14 21:47:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:51,083 INFO L93 Difference]: Finished difference Result 185 states and 242 transitions. [2019-10-14 21:47:51,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:47:51,083 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2019-10-14 21:47:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:51,085 INFO L225 Difference]: With dead ends: 185 [2019-10-14 21:47:51,085 INFO L226 Difference]: Without dead ends: 139 [2019-10-14 21:47:51,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:47:51,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-14 21:47:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 76. [2019-10-14 21:47:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-14 21:47:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2019-10-14 21:47:51,105 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 61 [2019-10-14 21:47:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:51,105 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2019-10-14 21:47:51,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:47:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2019-10-14 21:47:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:47:51,108 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:51,108 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:51,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:51,325 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:51,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:51,326 INFO L82 PathProgramCache]: Analyzing trace with hash 254629660, now seen corresponding path program 10 times [2019-10-14 21:47:51,326 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:51,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190873886] [2019-10-14 21:47:51,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:51,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:51,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:51,348 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:51,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260580565] [2019-10-14 21:47:51,349 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 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 [2019-10-14 21:47:51,404 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:51,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:51,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:47:51,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-14 21:47:51,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190873886] [2019-10-14 21:47:51,516 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:51,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260580565] [2019-10-14 21:47:51,517 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:51,517 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-14 21:47:51,517 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592969887] [2019-10-14 21:47:51,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:47:51,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:51,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:47:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:47:51,519 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 13 states. [2019-10-14 21:47:51,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:51,759 INFO L93 Difference]: Finished difference Result 199 states and 261 transitions. [2019-10-14 21:47:51,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:47:51,759 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2019-10-14 21:47:51,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:51,761 INFO L225 Difference]: With dead ends: 199 [2019-10-14 21:47:51,761 INFO L226 Difference]: Without dead ends: 150 [2019-10-14 21:47:51,762 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:47:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-10-14 21:47:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 81. [2019-10-14 21:47:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-14 21:47:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2019-10-14 21:47:51,770 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 66 [2019-10-14 21:47:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:51,771 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2019-10-14 21:47:51,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:47:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2019-10-14 21:47:51,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:47:51,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:51,772 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:51,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:51,978 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:51,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:51,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1584191241, now seen corresponding path program 11 times [2019-10-14 21:47:51,979 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:51,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589235979] [2019-10-14 21:47:51,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:51,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:51,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:51,999 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:52,000 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577667320] [2019-10-14 21:47:52,000 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 21:47:52,416 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:47:52,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:52,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:47:52,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-14 21:47:52,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589235979] [2019-10-14 21:47:52,537 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:52,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577667320] [2019-10-14 21:47:52,537 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:52,537 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 21:47:52,538 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558246108] [2019-10-14 21:47:52,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:47:52,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:52,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:47:52,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:52,539 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 14 states. [2019-10-14 21:47:52,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:52,861 INFO L93 Difference]: Finished difference Result 213 states and 280 transitions. [2019-10-14 21:47:52,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:47:52,862 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2019-10-14 21:47:52,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:52,864 INFO L225 Difference]: With dead ends: 213 [2019-10-14 21:47:52,864 INFO L226 Difference]: Without dead ends: 161 [2019-10-14 21:47:52,865 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-10-14 21:47:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 86. [2019-10-14 21:47:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 21:47:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2019-10-14 21:47:52,874 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 71 [2019-10-14 21:47:52,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:52,874 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2019-10-14 21:47:52,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:47:52,874 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2019-10-14 21:47:52,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:47:52,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:52,875 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:53,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:53,080 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:53,081 INFO L82 PathProgramCache]: Analyzing trace with hash -171924224, now seen corresponding path program 12 times [2019-10-14 21:47:53,081 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:53,081 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70898790] [2019-10-14 21:47:53,081 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:53,082 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:53,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:53,115 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:53,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374338257] [2019-10-14 21:47:53,115 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 21:47:54,148 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:47:54,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:54,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:47:54,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:47:54,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70898790] [2019-10-14 21:47:54,282 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:54,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374338257] [2019-10-14 21:47:54,283 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:54,283 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-14 21:47:54,283 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959919843] [2019-10-14 21:47:54,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:47:54,284 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:54,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:47:54,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:47:54,289 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 15 states. [2019-10-14 21:47:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:54,615 INFO L93 Difference]: Finished difference Result 227 states and 299 transitions. [2019-10-14 21:47:54,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:47:54,616 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2019-10-14 21:47:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:54,617 INFO L225 Difference]: With dead ends: 227 [2019-10-14 21:47:54,617 INFO L226 Difference]: Without dead ends: 172 [2019-10-14 21:47:54,618 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:47:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-10-14 21:47:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 91. [2019-10-14 21:47:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 21:47:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2019-10-14 21:47:54,626 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 76 [2019-10-14 21:47:54,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:54,627 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2019-10-14 21:47:54,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:47:54,627 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2019-10-14 21:47:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:47:54,628 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:54,628 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:54,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:54,841 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:54,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:54,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1140584155, now seen corresponding path program 13 times [2019-10-14 21:47:54,842 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:54,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050694037] [2019-10-14 21:47:54,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:54,860 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:54,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076434720] [2019-10-14 21:47:54,860 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 21:47:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:47:54,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-10-14 21:47:55,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050694037] [2019-10-14 21:47:55,059 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:55,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076434720] [2019-10-14 21:47:55,059 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:55,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-14 21:47:55,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898466473] [2019-10-14 21:47:55,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:47:55,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:55,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:47:55,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:47:55,060 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 16 states. [2019-10-14 21:47:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:55,462 INFO L93 Difference]: Finished difference Result 241 states and 318 transitions. [2019-10-14 21:47:55,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:47:55,462 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2019-10-14 21:47:55,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:55,464 INFO L225 Difference]: With dead ends: 241 [2019-10-14 21:47:55,464 INFO L226 Difference]: Without dead ends: 183 [2019-10-14 21:47:55,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:47:55,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-10-14 21:47:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 96. [2019-10-14 21:47:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-14 21:47:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2019-10-14 21:47:55,476 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 81 [2019-10-14 21:47:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:55,478 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2019-10-14 21:47:55,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:47:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2019-10-14 21:47:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 21:47:55,479 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:55,479 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:55,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:55,683 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:55,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:55,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1561365788, now seen corresponding path program 14 times [2019-10-14 21:47:55,684 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:55,685 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826924898] [2019-10-14 21:47:55,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:55,707 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:55,707 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100701545] [2019-10-14 21:47:55,707 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 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 [2019-10-14 21:47:55,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:55,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:55,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:47:55,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-10-14 21:47:55,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826924898] [2019-10-14 21:47:55,940 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:55,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100701545] [2019-10-14 21:47:55,941 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:55,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-14 21:47:55,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576294579] [2019-10-14 21:47:55,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:47:55,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:55,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:47:55,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:47:55,945 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand 17 states. [2019-10-14 21:47:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:56,330 INFO L93 Difference]: Finished difference Result 255 states and 337 transitions. [2019-10-14 21:47:56,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:47:56,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 86 [2019-10-14 21:47:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:56,332 INFO L225 Difference]: With dead ends: 255 [2019-10-14 21:47:56,332 INFO L226 Difference]: Without dead ends: 194 [2019-10-14 21:47:56,333 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:47:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-10-14 21:47:56,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 101. [2019-10-14 21:47:56,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-14 21:47:56,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2019-10-14 21:47:56,341 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 86 [2019-10-14 21:47:56,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:56,342 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2019-10-14 21:47:56,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:47:56,342 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2019-10-14 21:47:56,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-14 21:47:56,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:56,343 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:56,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:56,547 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:56,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1552853825, now seen corresponding path program 15 times [2019-10-14 21:47:56,549 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:56,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765237978] [2019-10-14 21:47:56,550 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,550 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:56,566 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:56,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516232689] [2019-10-14 21:47:56,567 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:58,051 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-14 21:47:58,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:58,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:47:58,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-14 21:47:58,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765237978] [2019-10-14 21:47:58,228 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:58,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516232689] [2019-10-14 21:47:58,228 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:58,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-14 21:47:58,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107094978] [2019-10-14 21:47:58,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:47:58,229 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:58,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:47:58,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:47:58,230 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand 18 states. [2019-10-14 21:47:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:58,625 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2019-10-14 21:47:58,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:47:58,626 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-10-14 21:47:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:58,628 INFO L225 Difference]: With dead ends: 269 [2019-10-14 21:47:58,629 INFO L226 Difference]: Without dead ends: 205 [2019-10-14 21:47:58,629 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:47:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-10-14 21:47:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 106. [2019-10-14 21:47:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-14 21:47:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2019-10-14 21:47:58,639 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 91 [2019-10-14 21:47:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:58,640 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2019-10-14 21:47:58,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:47:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2019-10-14 21:47:58,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 21:47:58,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:58,641 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:58,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:58,847 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:58,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:58,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1426325304, now seen corresponding path program 16 times [2019-10-14 21:47:58,847 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:58,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380887135] [2019-10-14 21:47:58,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:58,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:58,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:58,863 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:58,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987106837] [2019-10-14 21:47:58,863 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:58,935 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:58,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:58,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:47:58,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-10-14 21:47:59,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380887135] [2019-10-14 21:47:59,166 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:59,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987106837] [2019-10-14 21:47:59,166 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:59,167 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-14 21:47:59,167 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383396114] [2019-10-14 21:47:59,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:47:59,168 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:59,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:47:59,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:47:59,192 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand 19 states. [2019-10-14 21:47:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:59,591 INFO L93 Difference]: Finished difference Result 283 states and 375 transitions. [2019-10-14 21:47:59,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:47:59,592 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2019-10-14 21:47:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:59,593 INFO L225 Difference]: With dead ends: 283 [2019-10-14 21:47:59,594 INFO L226 Difference]: Without dead ends: 216 [2019-10-14 21:47:59,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:47:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-10-14 21:47:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 111. [2019-10-14 21:47:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-14 21:47:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2019-10-14 21:47:59,605 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 96 [2019-10-14 21:47:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:59,605 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2019-10-14 21:47:59,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:47:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2019-10-14 21:47:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-14 21:47:59,606 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:59,606 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:59,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:59,818 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:59,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1888118109, now seen corresponding path program 17 times [2019-10-14 21:47:59,819 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:59,819 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611163745] [2019-10-14 21:47:59,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:59,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:59,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:59,835 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:59,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720753720] [2019-10-14 21:47:59,836 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:01,686 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-14 21:48:01,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:01,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:48:01,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-10-14 21:48:01,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611163745] [2019-10-14 21:48:01,867 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:01,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720753720] [2019-10-14 21:48:01,867 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:01,867 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-14 21:48:01,867 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211068928] [2019-10-14 21:48:01,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:48:01,868 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:01,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:48:01,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:48:01,868 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand 20 states. [2019-10-14 21:48:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:02,363 INFO L93 Difference]: Finished difference Result 297 states and 394 transitions. [2019-10-14 21:48:02,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:48:02,364 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2019-10-14 21:48:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:02,365 INFO L225 Difference]: With dead ends: 297 [2019-10-14 21:48:02,366 INFO L226 Difference]: Without dead ends: 227 [2019-10-14 21:48:02,366 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:48:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-10-14 21:48:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 116. [2019-10-14 21:48:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-14 21:48:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2019-10-14 21:48:02,379 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 101 [2019-10-14 21:48:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:02,379 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2019-10-14 21:48:02,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:48:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2019-10-14 21:48:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 21:48:02,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:02,381 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:02,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:02,587 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:02,587 INFO L82 PathProgramCache]: Analyzing trace with hash -240611668, now seen corresponding path program 18 times [2019-10-14 21:48:02,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:02,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929688699] [2019-10-14 21:48:02,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:02,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:02,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:02,605 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:02,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162189618] [2019-10-14 21:48:02,606 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:05,010 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 21:48:05,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:05,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:48:05,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-10-14 21:48:05,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929688699] [2019-10-14 21:48:05,205 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:05,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162189618] [2019-10-14 21:48:05,205 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:05,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-14 21:48:05,206 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088887560] [2019-10-14 21:48:05,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:48:05,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:05,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:48:05,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:48:05,207 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand 21 states. [2019-10-14 21:48:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:05,762 INFO L93 Difference]: Finished difference Result 311 states and 413 transitions. [2019-10-14 21:48:05,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:48:05,763 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2019-10-14 21:48:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:05,766 INFO L225 Difference]: With dead ends: 311 [2019-10-14 21:48:05,766 INFO L226 Difference]: Without dead ends: 238 [2019-10-14 21:48:05,767 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:48:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-10-14 21:48:05,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 121. [2019-10-14 21:48:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-14 21:48:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2019-10-14 21:48:05,783 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 106 [2019-10-14 21:48:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:05,784 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2019-10-14 21:48:05,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:48:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2019-10-14 21:48:05,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-14 21:48:05,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:05,785 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:05,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:05,992 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:05,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:05,993 INFO L82 PathProgramCache]: Analyzing trace with hash 653590393, now seen corresponding path program 19 times [2019-10-14 21:48:05,993 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:05,993 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370478913] [2019-10-14 21:48:05,994 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:05,994 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:05,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:06,015 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:06,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139355869] [2019-10-14 21:48:06,016 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:06,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:48:06,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-10-14 21:48:06,339 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370478913] [2019-10-14 21:48:06,340 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:06,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139355869] [2019-10-14 21:48:06,340 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:06,340 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-14 21:48:06,340 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041701539] [2019-10-14 21:48:06,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:48:06,341 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:06,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:48:06,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:48:06,342 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 22 states. [2019-10-14 21:48:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:06,779 INFO L93 Difference]: Finished difference Result 325 states and 432 transitions. [2019-10-14 21:48:06,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:48:06,780 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2019-10-14 21:48:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:06,781 INFO L225 Difference]: With dead ends: 325 [2019-10-14 21:48:06,782 INFO L226 Difference]: Without dead ends: 249 [2019-10-14 21:48:06,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:48:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-10-14 21:48:06,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 126. [2019-10-14 21:48:06,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-14 21:48:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2019-10-14 21:48:06,792 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 111 [2019-10-14 21:48:06,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:06,793 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2019-10-14 21:48:06,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:48:06,793 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2019-10-14 21:48:06,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-14 21:48:06,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:06,794 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:06,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:06,998 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:06,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:06,998 INFO L82 PathProgramCache]: Analyzing trace with hash 238509200, now seen corresponding path program 20 times [2019-10-14 21:48:06,999 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:06,999 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053053681] [2019-10-14 21:48:06,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:06,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:06,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:07,013 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:07,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27443478] [2019-10-14 21:48:07,014 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:07,084 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:07,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:07,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:48:07,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-10-14 21:48:07,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053053681] [2019-10-14 21:48:07,357 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:07,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27443478] [2019-10-14 21:48:07,357 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:07,357 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-10-14 21:48:07,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121547272] [2019-10-14 21:48:07,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:48:07,358 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:07,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:48:07,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:48:07,359 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand 23 states. [2019-10-14 21:48:07,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:07,907 INFO L93 Difference]: Finished difference Result 339 states and 451 transitions. [2019-10-14 21:48:07,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:48:07,908 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2019-10-14 21:48:07,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:07,910 INFO L225 Difference]: With dead ends: 339 [2019-10-14 21:48:07,910 INFO L226 Difference]: Without dead ends: 260 [2019-10-14 21:48:07,911 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:48:07,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-10-14 21:48:07,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 131. [2019-10-14 21:48:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-10-14 21:48:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2019-10-14 21:48:07,922 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 116 [2019-10-14 21:48:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:07,922 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2019-10-14 21:48:07,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:48:07,922 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2019-10-14 21:48:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 21:48:07,923 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:07,923 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:08,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:08,127 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:08,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1229732245, now seen corresponding path program 21 times [2019-10-14 21:48:08,128 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:08,128 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333040929] [2019-10-14 21:48:08,128 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:08,129 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:08,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:08,144 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:08,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209846601] [2019-10-14 21:48:08,144 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:11,161 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-10-14 21:48:11,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:11,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:48:11,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-14 21:48:11,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333040929] [2019-10-14 21:48:11,401 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:11,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209846601] [2019-10-14 21:48:11,402 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:11,402 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-14 21:48:11,402 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419916930] [2019-10-14 21:48:11,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:48:11,402 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:11,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:48:11,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:48:11,403 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand 24 states. [2019-10-14 21:48:11,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:11,915 INFO L93 Difference]: Finished difference Result 353 states and 470 transitions. [2019-10-14 21:48:11,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:48:11,916 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2019-10-14 21:48:11,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:11,917 INFO L225 Difference]: With dead ends: 353 [2019-10-14 21:48:11,917 INFO L226 Difference]: Without dead ends: 271 [2019-10-14 21:48:11,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:48:11,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-10-14 21:48:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 136. [2019-10-14 21:48:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-10-14 21:48:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 161 transitions. [2019-10-14 21:48:11,929 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 161 transitions. Word has length 121 [2019-10-14 21:48:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:11,929 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 161 transitions. [2019-10-14 21:48:11,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:48:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 161 transitions. [2019-10-14 21:48:11,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 21:48:11,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:11,931 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:12,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:12,136 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:12,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:12,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1351964044, now seen corresponding path program 22 times [2019-10-14 21:48:12,137 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:12,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969856884] [2019-10-14 21:48:12,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:12,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:12,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:12,152 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:12,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060508332] [2019-10-14 21:48:12,152 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:12,231 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:12,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:12,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:48:12,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-10-14 21:48:12,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969856884] [2019-10-14 21:48:12,498 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:12,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060508332] [2019-10-14 21:48:12,498 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:12,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-10-14 21:48:12,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288925346] [2019-10-14 21:48:12,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:48:12,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:12,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:48:12,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:48:12,500 INFO L87 Difference]: Start difference. First operand 136 states and 161 transitions. Second operand 25 states. [2019-10-14 21:48:13,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:13,093 INFO L93 Difference]: Finished difference Result 367 states and 489 transitions. [2019-10-14 21:48:13,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:48:13,093 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-14 21:48:13,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:13,095 INFO L225 Difference]: With dead ends: 367 [2019-10-14 21:48:13,095 INFO L226 Difference]: Without dead ends: 282 [2019-10-14 21:48:13,096 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:48:13,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-10-14 21:48:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 141. [2019-10-14 21:48:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-10-14 21:48:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 167 transitions. [2019-10-14 21:48:13,110 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 167 transitions. Word has length 126 [2019-10-14 21:48:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:13,110 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 167 transitions. [2019-10-14 21:48:13,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:48:13,110 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 167 transitions. [2019-10-14 21:48:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-14 21:48:13,111 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:13,112 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:13,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:13,316 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:13,316 INFO L82 PathProgramCache]: Analyzing trace with hash -678571087, now seen corresponding path program 23 times [2019-10-14 21:48:13,316 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:13,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930978456] [2019-10-14 21:48:13,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:13,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:13,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:13,334 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:13,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039049963] [2019-10-14 21:48:13,335 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true