/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:23:22,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:23:22,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:23:22,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:23:22,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:23:22,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:23:22,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:23:22,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:23:22,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:23:22,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:23:22,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:23:22,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-06 21:23:23,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:23:23,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:23:23,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:23:23,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 21:23:23,028 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:23:23,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:23:23,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:23:23,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:23:23,030 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:23:23,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:23:23,030 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:23:23,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:23:23,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:23:23,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:23:23,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:23:23,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:23:23,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:23:23,033 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:23:23,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:23:23,033 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:23:23,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:23:23,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:23:23,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:23:23,034 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:23:23,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:23:23,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:23:23,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:23:23,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:23:23,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:23:23,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:23:23,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:23:23,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:23:23,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:23:23,324 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:23:23,343 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:23:23,347 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:23:23,348 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:23:23,349 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:23:23,349 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2019-11-06 21:23:23,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22b93c90/43e97e0d6fff437c847bc7ccc24f07f1/FLAG56a6fa632 [2019-11-06 21:23:23,854 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:23:23,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2019-11-06 21:23:23,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22b93c90/43e97e0d6fff437c847bc7ccc24f07f1/FLAG56a6fa632 [2019-11-06 21:23:24,270 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22b93c90/43e97e0d6fff437c847bc7ccc24f07f1 [2019-11-06 21:23:24,279 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:23:24,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:23:24,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:23:24,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:23:24,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:23:24,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:23:24" (1/1) ... [2019-11-06 21:23:24,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5df73c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:24, skipping insertion in model container [2019-11-06 21:23:24,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:23:24" (1/1) ... [2019-11-06 21:23:24,297 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:23:24,313 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:23:24,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:23:24,482 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:23:24,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:23:24,506 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:23:24,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:24 WrapperNode [2019-11-06 21:23:24,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:23:24,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:23:24,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:23:24,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:23:24,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:24" (1/1) ... [2019-11-06 21:23:24,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:24" (1/1) ... [2019-11-06 21:23:24,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:24" (1/1) ... [2019-11-06 21:23:24,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:24" (1/1) ... [2019-11-06 21:23:24,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:24" (1/1) ... [2019-11-06 21:23:24,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:24" (1/1) ... [2019-11-06 21:23:24,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:24" (1/1) ... [2019-11-06 21:23:24,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:23:24,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:23:24,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:23:24,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:23:24,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:23:24,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:23:24,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:23:24,664 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:23:24,664 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:23:24,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:23:24,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 21:23:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:23:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:23:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:23:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:23:24,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:23:24,831 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:23:24,832 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:23:24,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:23:24 BoogieIcfgContainer [2019-11-06 21:23:24,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:23:24,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:23:24,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:23:24,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:23:24,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:23:24" (1/3) ... [2019-11-06 21:23:24,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fdaac0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:23:24, skipping insertion in model container [2019-11-06 21:23:24,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:23:24" (2/3) ... [2019-11-06 21:23:24,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fdaac0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:23:24, skipping insertion in model container [2019-11-06 21:23:24,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:23:24" (3/3) ... [2019-11-06 21:23:24,841 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2019-11-06 21:23:24,851 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:23:24,858 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:23:24,868 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:23:24,888 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:23:24,888 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:23:24,889 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:23:24,889 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:23:24,889 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:23:24,889 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:23:24,889 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:23:24,889 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:23:24,905 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-06 21:23:24,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-06 21:23:24,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:24,910 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:24,912 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:24,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:24,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1281911547, now seen corresponding path program 1 times [2019-11-06 21:23:24,924 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:24,925 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291900128] [2019-11-06 21:23:24,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:25,022 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291900128] [2019-11-06 21:23:25,023 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:23:25,023 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 21:23:25,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336790730] [2019-11-06 21:23:25,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 21:23:25,030 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:25,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 21:23:25,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:23:25,046 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-11-06 21:23:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:25,069 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-06 21:23:25,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 21:23:25,070 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-06 21:23:25,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:25,079 INFO L225 Difference]: With dead ends: 32 [2019-11-06 21:23:25,079 INFO L226 Difference]: Without dead ends: 13 [2019-11-06 21:23:25,082 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:23:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-06 21:23:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-06 21:23:25,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-06 21:23:25,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-06 21:23:25,120 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-11-06 21:23:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:25,121 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-06 21:23:25,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 21:23:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-06 21:23:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-06 21:23:25,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:25,122 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:25,122 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:25,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:25,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1287452673, now seen corresponding path program 1 times [2019-11-06 21:23:25,123 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:25,124 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822519809] [2019-11-06 21:23:25,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:25,132 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:25,132 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741441730] [2019-11-06 21:23:25,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:25,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 21:23:25,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:25,277 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822519809] [2019-11-06 21:23:25,277 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:25,278 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741441730] [2019-11-06 21:23:25,281 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:23:25,281 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 21:23:25,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973254983] [2019-11-06 21:23:25,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 21:23:25,291 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:25,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 21:23:25,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:23:25,292 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2019-11-06 21:23:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:25,364 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-06 21:23:25,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:23:25,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-06 21:23:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:25,366 INFO L225 Difference]: With dead ends: 20 [2019-11-06 21:23:25,366 INFO L226 Difference]: Without dead ends: 15 [2019-11-06 21:23:25,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:23:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-06 21:23:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-06 21:23:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-06 21:23:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-11-06 21:23:25,373 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-11-06 21:23:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:25,373 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-11-06 21:23:25,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 21:23:25,376 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-11-06 21:23:25,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-06 21:23:25,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:25,377 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:25,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:25,581 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:25,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:25,582 INFO L82 PathProgramCache]: Analyzing trace with hash 843923389, now seen corresponding path program 1 times [2019-11-06 21:23:25,583 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:25,583 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298853035] [2019-11-06 21:23:25,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:25,602 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:25,602 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050141549] [2019-11-06 21:23:25,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:25,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 21:23:25,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:25,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:25,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298853035] [2019-11-06 21:23:25,764 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:25,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050141549] [2019-11-06 21:23:25,765 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:25,765 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 21:23:25,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479992106] [2019-11-06 21:23:25,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:23:25,766 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:25,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:23:25,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:23:25,767 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2019-11-06 21:23:25,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:25,889 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-11-06 21:23:25,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:23:25,890 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-06 21:23:25,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:25,891 INFO L225 Difference]: With dead ends: 21 [2019-11-06 21:23:25,891 INFO L226 Difference]: Without dead ends: 16 [2019-11-06 21:23:25,891 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:23:25,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-06 21:23:25,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-06 21:23:25,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-06 21:23:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-06 21:23:25,896 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-11-06 21:23:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:25,897 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-06 21:23:25,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:23:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-06 21:23:25,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 21:23:25,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:25,898 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:26,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:26,102 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:26,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:26,103 INFO L82 PathProgramCache]: Analyzing trace with hash 396918779, now seen corresponding path program 2 times [2019-11-06 21:23:26,103 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:26,103 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211926447] [2019-11-06 21:23:26,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:26,112 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:26,113 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147157364] [2019-11-06 21:23:26,113 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:26,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:23:26,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:26,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 21:23:26,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:26,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:26,312 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211926447] [2019-11-06 21:23:26,313 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:26,313 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147157364] [2019-11-06 21:23:26,313 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:26,313 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:23:26,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241818904] [2019-11-06 21:23:26,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:23:26,314 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:26,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:23:26,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:23:26,315 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2019-11-06 21:23:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:26,439 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-06 21:23:26,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:23:26,439 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-06 21:23:26,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:26,440 INFO L225 Difference]: With dead ends: 23 [2019-11-06 21:23:26,440 INFO L226 Difference]: Without dead ends: 18 [2019-11-06 21:23:26,441 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:23:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-06 21:23:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-06 21:23:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-06 21:23:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-06 21:23:26,446 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2019-11-06 21:23:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:26,446 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-06 21:23:26,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:23:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-06 21:23:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 21:23:26,447 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:26,447 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:26,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:26,656 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:26,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:26,657 INFO L82 PathProgramCache]: Analyzing trace with hash 322218169, now seen corresponding path program 3 times [2019-11-06 21:23:26,657 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:26,657 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859353572] [2019-11-06 21:23:26,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:26,667 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:26,667 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466078632] [2019-11-06 21:23:26,667 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:26,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 21:23:26,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:26,717 WARN L254 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:23:26,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:26,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:26,878 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859353572] [2019-11-06 21:23:26,878 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:26,879 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466078632] [2019-11-06 21:23:26,879 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:26,879 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-06 21:23:26,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184057079] [2019-11-06 21:23:26,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:23:26,880 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:26,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:23:26,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:23:26,882 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 12 states. [2019-11-06 21:23:27,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:27,051 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-11-06 21:23:27,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 21:23:27,053 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-06 21:23:27,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:27,054 INFO L225 Difference]: With dead ends: 25 [2019-11-06 21:23:27,054 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 21:23:27,055 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:23:27,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 21:23:27,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-06 21:23:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 21:23:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-06 21:23:27,065 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2019-11-06 21:23:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:27,065 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-06 21:23:27,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:23:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-06 21:23:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 21:23:27,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:27,069 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:27,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:27,280 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:27,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1549375991, now seen corresponding path program 4 times [2019-11-06 21:23:27,281 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:27,281 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634582693] [2019-11-06 21:23:27,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:27,293 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:27,294 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49340048] [2019-11-06 21:23:27,294 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:27,320 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:23:27,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:27,321 WARN L254 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 21:23:27,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:27,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:27,516 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634582693] [2019-11-06 21:23:27,516 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:27,516 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49340048] [2019-11-06 21:23:27,516 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:27,516 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-06 21:23:27,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183826610] [2019-11-06 21:23:27,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 21:23:27,518 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:27,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 21:23:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:23:27,519 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 14 states. [2019-11-06 21:23:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:27,671 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-11-06 21:23:27,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 21:23:27,672 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-11-06 21:23:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:27,673 INFO L225 Difference]: With dead ends: 27 [2019-11-06 21:23:27,673 INFO L226 Difference]: Without dead ends: 22 [2019-11-06 21:23:27,674 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:23:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-06 21:23:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-06 21:23:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-06 21:23:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-11-06 21:23:27,680 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2019-11-06 21:23:27,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:27,681 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-11-06 21:23:27,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 21:23:27,681 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-11-06 21:23:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 21:23:27,682 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:27,682 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:27,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:27,885 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:27,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:27,886 INFO L82 PathProgramCache]: Analyzing trace with hash -267963467, now seen corresponding path program 5 times [2019-11-06 21:23:27,887 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:27,887 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058257970] [2019-11-06 21:23:27,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:27,901 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:27,905 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349112882] [2019-11-06 21:23:27,906 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:27,935 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 21:23:27,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:27,937 WARN L254 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-06 21:23:27,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:28,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:28,189 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058257970] [2019-11-06 21:23:28,189 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:28,189 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349112882] [2019-11-06 21:23:28,190 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:28,190 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-06 21:23:28,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915294904] [2019-11-06 21:23:28,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 21:23:28,191 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:28,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 21:23:28,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:23:28,192 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 16 states. [2019-11-06 21:23:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:28,379 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-11-06 21:23:28,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 21:23:28,380 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2019-11-06 21:23:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:28,381 INFO L225 Difference]: With dead ends: 29 [2019-11-06 21:23:28,381 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 21:23:28,382 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:23:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 21:23:28,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-06 21:23:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 21:23:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-11-06 21:23:28,387 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2019-11-06 21:23:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:28,387 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-11-06 21:23:28,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 21:23:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-11-06 21:23:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 21:23:28,388 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:28,388 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:28,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:28,591 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:28,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:28,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1320506867, now seen corresponding path program 6 times [2019-11-06 21:23:28,593 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:28,593 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575588865] [2019-11-06 21:23:28,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:28,607 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:28,607 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223302465] [2019-11-06 21:23:28,607 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:28,645 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 21:23:28,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:28,646 WARN L254 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-06 21:23:28,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:28,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:28,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575588865] [2019-11-06 21:23:28,894 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:28,895 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223302465] [2019-11-06 21:23:28,895 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:28,895 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-11-06 21:23:28,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463950996] [2019-11-06 21:23:28,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 21:23:28,896 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:28,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 21:23:28,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:23:28,897 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 18 states. [2019-11-06 21:23:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:29,103 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-11-06 21:23:29,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 21:23:29,104 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2019-11-06 21:23:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:29,105 INFO L225 Difference]: With dead ends: 31 [2019-11-06 21:23:29,106 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 21:23:29,106 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2019-11-06 21:23:29,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 21:23:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 21:23:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 21:23:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-11-06 21:23:29,112 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2019-11-06 21:23:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:29,113 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-11-06 21:23:29,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 21:23:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-11-06 21:23:29,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 21:23:29,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:29,114 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:29,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:29,318 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:29,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:29,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1167859535, now seen corresponding path program 7 times [2019-11-06 21:23:29,319 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:29,319 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454151126] [2019-11-06 21:23:29,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:29,329 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:29,329 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630309566] [2019-11-06 21:23:29,330 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:29,368 WARN L254 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-06 21:23:29,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:29,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:29,646 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454151126] [2019-11-06 21:23:29,646 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:29,646 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630309566] [2019-11-06 21:23:29,646 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:29,646 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-11-06 21:23:29,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635742215] [2019-11-06 21:23:29,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 21:23:29,647 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:29,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 21:23:29,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2019-11-06 21:23:29,648 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 20 states. [2019-11-06 21:23:29,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:29,905 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-11-06 21:23:29,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 21:23:29,906 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2019-11-06 21:23:29,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:29,906 INFO L225 Difference]: With dead ends: 33 [2019-11-06 21:23:29,907 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 21:23:29,907 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2019-11-06 21:23:29,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 21:23:29,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-06 21:23:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 21:23:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-11-06 21:23:29,912 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2019-11-06 21:23:29,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:29,913 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-11-06 21:23:29,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 21:23:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-11-06 21:23:29,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 21:23:29,913 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:29,914 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:30,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:30,123 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:30,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:30,123 INFO L82 PathProgramCache]: Analyzing trace with hash -191187985, now seen corresponding path program 8 times [2019-11-06 21:23:30,123 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:30,123 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767691329] [2019-11-06 21:23:30,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:30,133 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:30,134 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826364429] [2019-11-06 21:23:30,134 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:30,166 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:23:30,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:30,168 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-06 21:23:30,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:30,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:30,516 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767691329] [2019-11-06 21:23:30,516 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:30,516 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826364429] [2019-11-06 21:23:30,516 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:30,516 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-11-06 21:23:30,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343748336] [2019-11-06 21:23:30,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 21:23:30,517 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:30,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 21:23:30,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2019-11-06 21:23:30,518 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 22 states. [2019-11-06 21:23:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:30,814 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-11-06 21:23:30,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 21:23:30,815 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2019-11-06 21:23:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:30,815 INFO L225 Difference]: With dead ends: 35 [2019-11-06 21:23:30,815 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 21:23:30,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2019-11-06 21:23:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 21:23:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-06 21:23:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 21:23:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-11-06 21:23:30,821 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2019-11-06 21:23:30,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:30,821 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-11-06 21:23:30,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 21:23:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-11-06 21:23:30,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 21:23:30,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:30,823 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:31,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:31,025 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:31,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2087301037, now seen corresponding path program 9 times [2019-11-06 21:23:31,026 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:31,026 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476791036] [2019-11-06 21:23:31,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:31,037 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:31,038 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130288489] [2019-11-06 21:23:31,038 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:31,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-06 21:23:31,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:31,083 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-06 21:23:31,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:31,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:31,427 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476791036] [2019-11-06 21:23:31,427 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:31,427 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130288489] [2019-11-06 21:23:31,427 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:31,427 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-11-06 21:23:31,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442673931] [2019-11-06 21:23:31,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 21:23:31,428 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:31,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 21:23:31,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2019-11-06 21:23:31,429 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 24 states. [2019-11-06 21:23:31,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:31,815 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-11-06 21:23:31,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 21:23:31,815 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2019-11-06 21:23:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:31,816 INFO L225 Difference]: With dead ends: 37 [2019-11-06 21:23:31,816 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 21:23:31,816 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2019-11-06 21:23:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 21:23:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-06 21:23:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 21:23:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-11-06 21:23:31,821 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2019-11-06 21:23:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:31,821 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-11-06 21:23:31,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 21:23:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-11-06 21:23:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 21:23:31,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:31,823 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:32,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:32,030 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:32,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1281930219, now seen corresponding path program 10 times [2019-11-06 21:23:32,030 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:32,030 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282113398] [2019-11-06 21:23:32,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:32,042 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:32,042 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964415798] [2019-11-06 21:23:32,042 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:32,071 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:23:32,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:32,072 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 51 conjunts are in the unsatisfiable core [2019-11-06 21:23:32,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:32,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:32,456 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282113398] [2019-11-06 21:23:32,456 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:32,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964415798] [2019-11-06 21:23:32,457 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:32,457 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-11-06 21:23:32,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671327447] [2019-11-06 21:23:32,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 21:23:32,458 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:32,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 21:23:32,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2019-11-06 21:23:32,459 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 26 states. [2019-11-06 21:23:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:32,909 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-11-06 21:23:32,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 21:23:32,910 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 31 [2019-11-06 21:23:32,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:32,911 INFO L225 Difference]: With dead ends: 39 [2019-11-06 21:23:32,911 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 21:23:32,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2019-11-06 21:23:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 21:23:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-06 21:23:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 21:23:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-11-06 21:23:32,917 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2019-11-06 21:23:32,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:32,918 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-11-06 21:23:32,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 21:23:32,918 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-11-06 21:23:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 21:23:32,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:32,919 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:33,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:33,123 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:33,123 INFO L82 PathProgramCache]: Analyzing trace with hash 414687401, now seen corresponding path program 11 times [2019-11-06 21:23:33,124 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:33,124 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248015746] [2019-11-06 21:23:33,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:33,137 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:33,138 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398329388] [2019-11-06 21:23:33,138 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:33,173 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 21:23:33,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:33,175 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 55 conjunts are in the unsatisfiable core [2019-11-06 21:23:33,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:33,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:33,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248015746] [2019-11-06 21:23:33,650 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:33,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398329388] [2019-11-06 21:23:33,650 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:33,650 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-11-06 21:23:33,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812565501] [2019-11-06 21:23:33,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 21:23:33,651 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:33,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 21:23:33,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2019-11-06 21:23:33,652 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 28 states. [2019-11-06 21:23:34,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:34,186 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-11-06 21:23:34,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 21:23:34,187 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2019-11-06 21:23:34,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:34,188 INFO L225 Difference]: With dead ends: 41 [2019-11-06 21:23:34,189 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 21:23:34,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2019-11-06 21:23:34,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 21:23:34,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-06 21:23:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 21:23:34,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-11-06 21:23:34,196 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2019-11-06 21:23:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:34,196 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-11-06 21:23:34,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 21:23:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-11-06 21:23:34,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 21:23:34,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:34,197 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:34,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:34,401 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:34,402 INFO L82 PathProgramCache]: Analyzing trace with hash 217994727, now seen corresponding path program 12 times [2019-11-06 21:23:34,402 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:34,402 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65951790] [2019-11-06 21:23:34,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:34,414 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:34,414 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536004654] [2019-11-06 21:23:34,414 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:34,469 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 21:23:34,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:34,472 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 59 conjunts are in the unsatisfiable core [2019-11-06 21:23:34,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:34,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:34,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65951790] [2019-11-06 21:23:34,962 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:34,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536004654] [2019-11-06 21:23:34,962 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:34,962 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-11-06 21:23:34,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942248477] [2019-11-06 21:23:34,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 21:23:34,963 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:34,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 21:23:34,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2019-11-06 21:23:34,964 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 30 states. [2019-11-06 21:23:35,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:35,543 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-11-06 21:23:35,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 21:23:35,544 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 35 [2019-11-06 21:23:35,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:35,545 INFO L225 Difference]: With dead ends: 43 [2019-11-06 21:23:35,545 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 21:23:35,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=926, Unknown=0, NotChecked=0, Total=992 [2019-11-06 21:23:35,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 21:23:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-06 21:23:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 21:23:35,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-11-06 21:23:35,554 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2019-11-06 21:23:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:35,556 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-11-06 21:23:35,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 21:23:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-11-06 21:23:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 21:23:35,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:35,558 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:35,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:35,764 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash 174896037, now seen corresponding path program 13 times [2019-11-06 21:23:35,764 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:35,764 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573316946] [2019-11-06 21:23:35,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:35,778 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:35,778 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184430941] [2019-11-06 21:23:35,778 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:35,825 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-06 21:23:35,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:36,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:36,427 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573316946] [2019-11-06 21:23:36,427 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:36,427 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184430941] [2019-11-06 21:23:36,428 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:36,428 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-11-06 21:23:36,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276871429] [2019-11-06 21:23:36,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 21:23:36,428 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:36,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 21:23:36,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2019-11-06 21:23:36,436 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 32 states. [2019-11-06 21:23:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:37,059 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-11-06 21:23:37,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 21:23:37,059 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 37 [2019-11-06 21:23:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:37,060 INFO L225 Difference]: With dead ends: 45 [2019-11-06 21:23:37,061 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 21:23:37,061 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 21:23:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 21:23:37,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-06 21:23:37,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 21:23:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-11-06 21:23:37,066 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2019-11-06 21:23:37,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:37,067 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-11-06 21:23:37,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 21:23:37,067 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-11-06 21:23:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 21:23:37,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:37,068 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:37,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:37,272 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:37,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1706727907, now seen corresponding path program 14 times [2019-11-06 21:23:37,272 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:37,273 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513758944] [2019-11-06 21:23:37,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:37,285 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:37,285 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311421793] [2019-11-06 21:23:37,285 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:37,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:23:37,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:37,336 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 67 conjunts are in the unsatisfiable core [2019-11-06 21:23:37,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:37,914 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:37,971 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513758944] [2019-11-06 21:23:37,971 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:37,971 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311421793] [2019-11-06 21:23:37,972 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:37,972 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-11-06 21:23:37,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969457795] [2019-11-06 21:23:37,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-06 21:23:37,973 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:37,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-06 21:23:37,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 21:23:37,974 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 34 states. [2019-11-06 21:23:38,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:38,694 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-11-06 21:23:38,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-06 21:23:38,694 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 39 [2019-11-06 21:23:38,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:38,695 INFO L225 Difference]: With dead ends: 47 [2019-11-06 21:23:38,695 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 21:23:38,696 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=1186, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 21:23:38,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 21:23:38,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-06 21:23:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 21:23:38,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-11-06 21:23:38,703 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2019-11-06 21:23:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:38,704 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-11-06 21:23:38,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-06 21:23:38,704 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-11-06 21:23:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 21:23:38,705 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:38,705 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:38,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:38,914 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:38,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:38,915 INFO L82 PathProgramCache]: Analyzing trace with hash 623372449, now seen corresponding path program 15 times [2019-11-06 21:23:38,915 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:38,916 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468654371] [2019-11-06 21:23:38,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:38,927 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:38,928 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040211969] [2019-11-06 21:23:38,928 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:39,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-06 21:23:39,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:39,003 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 71 conjunts are in the unsatisfiable core [2019-11-06 21:23:39,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:39,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:39,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468654371] [2019-11-06 21:23:39,790 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:39,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040211969] [2019-11-06 21:23:39,790 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:39,790 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-11-06 21:23:39,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270682380] [2019-11-06 21:23:39,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 21:23:39,791 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:39,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 21:23:39,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 21:23:39,792 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 36 states. [2019-11-06 21:23:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:40,687 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-11-06 21:23:40,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 21:23:40,688 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2019-11-06 21:23:40,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:40,689 INFO L225 Difference]: With dead ends: 49 [2019-11-06 21:23:40,689 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 21:23:40,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=1328, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 21:23:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 21:23:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-06 21:23:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 21:23:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-11-06 21:23:40,696 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2019-11-06 21:23:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:40,696 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-11-06 21:23:40,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 21:23:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-11-06 21:23:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 21:23:40,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:40,697 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:40,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:40,901 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:40,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:40,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1099137057, now seen corresponding path program 16 times [2019-11-06 21:23:40,902 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:40,903 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854640804] [2019-11-06 21:23:40,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:40,913 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:40,913 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678244687] [2019-11-06 21:23:40,914 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 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 [2019-11-06 21:23:40,968 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:23:40,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:40,970 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 75 conjunts are in the unsatisfiable core [2019-11-06 21:23:40,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:41,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:41,741 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854640804] [2019-11-06 21:23:41,741 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:41,741 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678244687] [2019-11-06 21:23:41,742 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:41,742 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-11-06 21:23:41,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19184694] [2019-11-06 21:23:41,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-06 21:23:41,742 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:41,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-06 21:23:41,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 21:23:41,743 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 38 states. [2019-11-06 21:23:42,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:42,606 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-11-06 21:23:42,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-06 21:23:42,606 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 43 [2019-11-06 21:23:42,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:42,607 INFO L225 Difference]: With dead ends: 51 [2019-11-06 21:23:42,607 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 21:23:42,608 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=1478, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 21:23:42,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 21:23:42,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-06 21:23:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 21:23:42,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-11-06 21:23:42,615 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2019-11-06 21:23:42,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:42,615 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-11-06 21:23:42,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-06 21:23:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-11-06 21:23:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 21:23:42,616 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:42,617 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:42,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:42,820 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:42,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:42,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1426603933, now seen corresponding path program 17 times [2019-11-06 21:23:42,821 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:42,821 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408455057] [2019-11-06 21:23:42,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:42,832 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:42,832 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992304188] [2019-11-06 21:23:42,832 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 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 [2019-11-06 21:23:42,885 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-06 21:23:42,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:42,886 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 79 conjunts are in the unsatisfiable core [2019-11-06 21:23:42,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:43,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:43,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408455057] [2019-11-06 21:23:43,720 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:43,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992304188] [2019-11-06 21:23:43,720 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:43,720 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-11-06 21:23:43,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037333827] [2019-11-06 21:23:43,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 21:23:43,721 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:43,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 21:23:43,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 21:23:43,722 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 40 states. [2019-11-06 21:23:44,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:44,667 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-11-06 21:23:44,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 21:23:44,667 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 45 [2019-11-06 21:23:44,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:44,668 INFO L225 Difference]: With dead ends: 53 [2019-11-06 21:23:44,668 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 21:23:44,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=1636, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 21:23:44,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 21:23:44,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-06 21:23:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 21:23:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-11-06 21:23:44,674 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2019-11-06 21:23:44,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:44,674 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-11-06 21:23:44,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 21:23:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-11-06 21:23:44,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 21:23:44,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:44,675 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:44,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:44,879 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:44,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:44,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2007173083, now seen corresponding path program 18 times [2019-11-06 21:23:44,881 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:44,881 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430569207] [2019-11-06 21:23:44,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:44,892 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:44,892 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320669109] [2019-11-06 21:23:44,892 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 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 [2019-11-06 21:23:45,008 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-06 21:23:45,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:45,010 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 83 conjunts are in the unsatisfiable core [2019-11-06 21:23:45,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:45,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:45,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430569207] [2019-11-06 21:23:45,998 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:45,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320669109] [2019-11-06 21:23:45,998 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:45,998 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-11-06 21:23:45,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627178656] [2019-11-06 21:23:45,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-06 21:23:45,999 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:45,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-06 21:23:46,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 21:23:46,005 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 42 states. [2019-11-06 21:23:47,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:47,093 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-11-06 21:23:47,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 21:23:47,094 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 47 [2019-11-06 21:23:47,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:47,094 INFO L225 Difference]: With dead ends: 55 [2019-11-06 21:23:47,094 INFO L226 Difference]: Without dead ends: 50 [2019-11-06 21:23:47,095 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=90, Invalid=1802, Unknown=0, NotChecked=0, Total=1892 [2019-11-06 21:23:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-06 21:23:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-06 21:23:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-06 21:23:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-11-06 21:23:47,101 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2019-11-06 21:23:47,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:47,101 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-11-06 21:23:47,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-06 21:23:47,102 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-11-06 21:23:47,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 21:23:47,102 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:47,102 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:47,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:47,313 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:47,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1588377753, now seen corresponding path program 19 times [2019-11-06 21:23:47,314 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:47,314 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133869256] [2019-11-06 21:23:47,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:47,324 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:47,325 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90124085] [2019-11-06 21:23:47,325 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 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 [2019-11-06 21:23:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:23:47,387 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 87 conjunts are in the unsatisfiable core [2019-11-06 21:23:47,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:48,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:48,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133869256] [2019-11-06 21:23:48,395 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:48,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90124085] [2019-11-06 21:23:48,395 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:48,395 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-11-06 21:23:48,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004339745] [2019-11-06 21:23:48,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-06 21:23:48,396 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-06 21:23:48,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2019-11-06 21:23:48,397 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 44 states. [2019-11-06 21:23:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:49,583 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-11-06 21:23:49,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-06 21:23:49,583 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 49 [2019-11-06 21:23:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:49,584 INFO L225 Difference]: With dead ends: 57 [2019-11-06 21:23:49,584 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 21:23:49,586 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=1976, Unknown=0, NotChecked=0, Total=2070 [2019-11-06 21:23:49,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 21:23:49,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-06 21:23:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 21:23:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-11-06 21:23:49,591 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2019-11-06 21:23:49,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:49,592 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-11-06 21:23:49,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-06 21:23:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-11-06 21:23:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 21:23:49,593 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:49,593 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:49,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:49,796 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:49,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1441975849, now seen corresponding path program 20 times [2019-11-06 21:23:49,797 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:49,797 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497671188] [2019-11-06 21:23:49,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:49,807 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:49,808 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707888324] [2019-11-06 21:23:49,808 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 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 [2019-11-06 21:23:49,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:23:49,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:49,882 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 91 conjunts are in the unsatisfiable core [2019-11-06 21:23:49,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:50,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:50,978 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497671188] [2019-11-06 21:23:50,979 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:50,979 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707888324] [2019-11-06 21:23:50,979 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:50,979 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-11-06 21:23:50,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746678056] [2019-11-06 21:23:50,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-06 21:23:50,979 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-06 21:23:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2019-11-06 21:23:50,980 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 46 states. [2019-11-06 21:23:52,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:52,265 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-11-06 21:23:52,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-06 21:23:52,268 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 51 [2019-11-06 21:23:52,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:52,268 INFO L225 Difference]: With dead ends: 59 [2019-11-06 21:23:52,269 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 21:23:52,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=98, Invalid=2158, Unknown=0, NotChecked=0, Total=2256 [2019-11-06 21:23:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 21:23:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-06 21:23:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 21:23:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-11-06 21:23:52,274 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2019-11-06 21:23:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:52,274 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-11-06 21:23:52,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-06 21:23:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-11-06 21:23:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 21:23:52,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:52,275 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:52,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:52,479 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:52,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1623960683, now seen corresponding path program 21 times [2019-11-06 21:23:52,480 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:52,480 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579909797] [2019-11-06 21:23:52,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:52,491 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:52,491 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056368802] [2019-11-06 21:23:52,491 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 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 [2019-11-06 21:23:52,641 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-06 21:23:52,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:52,643 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 95 conjunts are in the unsatisfiable core [2019-11-06 21:23:52,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:53,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:53,841 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579909797] [2019-11-06 21:23:53,841 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:53,842 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056368802] [2019-11-06 21:23:53,842 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:53,842 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-11-06 21:23:53,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481960611] [2019-11-06 21:23:53,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-06 21:23:53,843 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:53,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-06 21:23:53,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2019-11-06 21:23:53,844 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 48 states. [2019-11-06 21:23:55,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:55,277 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-11-06 21:23:55,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-06 21:23:55,277 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 53 [2019-11-06 21:23:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:55,278 INFO L225 Difference]: With dead ends: 61 [2019-11-06 21:23:55,278 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 21:23:55,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=102, Invalid=2348, Unknown=0, NotChecked=0, Total=2450 [2019-11-06 21:23:55,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 21:23:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-06 21:23:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 21:23:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-11-06 21:23:55,283 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2019-11-06 21:23:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:55,284 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-11-06 21:23:55,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-06 21:23:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-11-06 21:23:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 21:23:55,284 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:55,285 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:55,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:55,489 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:55,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:55,490 INFO L82 PathProgramCache]: Analyzing trace with hash -417727021, now seen corresponding path program 22 times [2019-11-06 21:23:55,490 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:55,491 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615126853] [2019-11-06 21:23:55,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:55,507 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:55,507 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615286841] [2019-11-06 21:23:55,508 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 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 [2019-11-06 21:23:55,578 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:23:55,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:55,580 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 99 conjunts are in the unsatisfiable core [2019-11-06 21:23:55,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:56,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:56,824 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615126853] [2019-11-06 21:23:56,824 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:56,824 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615286841] [2019-11-06 21:23:56,824 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:56,824 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-11-06 21:23:56,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917681878] [2019-11-06 21:23:56,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-06 21:23:56,825 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:56,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-06 21:23:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2019-11-06 21:23:56,826 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 50 states. [2019-11-06 21:23:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:23:58,316 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-11-06 21:23:58,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-06 21:23:58,316 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 55 [2019-11-06 21:23:58,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:23:58,317 INFO L225 Difference]: With dead ends: 63 [2019-11-06 21:23:58,317 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 21:23:58,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=2546, Unknown=0, NotChecked=0, Total=2652 [2019-11-06 21:23:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 21:23:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-06 21:23:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 21:23:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-11-06 21:23:58,324 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2019-11-06 21:23:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:23:58,324 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-11-06 21:23:58,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-06 21:23:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-11-06 21:23:58,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 21:23:58,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:23:58,325 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:23:58,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:58,526 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:23:58,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:23:58,526 INFO L82 PathProgramCache]: Analyzing trace with hash -868347759, now seen corresponding path program 23 times [2019-11-06 21:23:58,527 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:23:58,527 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926581379] [2019-11-06 21:23:58,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:23:58,536 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:23:58,536 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934678492] [2019-11-06 21:23:58,537 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:23:58,624 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-06 21:23:58,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:23:58,626 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 103 conjunts are in the unsatisfiable core [2019-11-06 21:23:58,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:23:59,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:23:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:23:59,945 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926581379] [2019-11-06 21:23:59,946 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:23:59,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934678492] [2019-11-06 21:23:59,946 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:23:59,946 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-11-06 21:23:59,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884071547] [2019-11-06 21:23:59,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-06 21:23:59,947 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:23:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-06 21:23:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2019-11-06 21:23:59,948 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 52 states. [2019-11-06 21:24:01,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:01,572 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-11-06 21:24:01,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-06 21:24:01,574 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 57 [2019-11-06 21:24:01,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:01,575 INFO L225 Difference]: With dead ends: 65 [2019-11-06 21:24:01,575 INFO L226 Difference]: Without dead ends: 60 [2019-11-06 21:24:01,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=2752, Unknown=0, NotChecked=0, Total=2862 [2019-11-06 21:24:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-06 21:24:01,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-06 21:24:01,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-06 21:24:01,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-11-06 21:24:01,579 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2019-11-06 21:24:01,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:01,580 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-11-06 21:24:01,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-06 21:24:01,580 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-11-06 21:24:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 21:24:01,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:01,580 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:01,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:01,781 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:01,782 INFO L82 PathProgramCache]: Analyzing trace with hash -123180081, now seen corresponding path program 24 times [2019-11-06 21:24:01,782 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:01,783 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579150335] [2019-11-06 21:24:01,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:01,796 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:24:01,797 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167907692] [2019-11-06 21:24:01,797 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:01,957 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-06 21:24:01,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:24:01,960 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-06 21:24:01,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:03,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:03,377 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579150335] [2019-11-06 21:24:03,377 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:24:03,377 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167907692] [2019-11-06 21:24:03,377 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:24:03,377 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-11-06 21:24:03,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143654345] [2019-11-06 21:24:03,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-06 21:24:03,378 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:03,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-06 21:24:03,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2019-11-06 21:24:03,379 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 54 states. [2019-11-06 21:24:05,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:05,141 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-11-06 21:24:05,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-06 21:24:05,141 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 59 [2019-11-06 21:24:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:05,142 INFO L225 Difference]: With dead ends: 67 [2019-11-06 21:24:05,142 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 21:24:05,144 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=2966, Unknown=0, NotChecked=0, Total=3080 [2019-11-06 21:24:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 21:24:05,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-06 21:24:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-06 21:24:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-11-06 21:24:05,148 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2019-11-06 21:24:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:05,148 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-11-06 21:24:05,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-06 21:24:05,149 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-11-06 21:24:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 21:24:05,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:05,149 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:05,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:05,354 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:05,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1276579955, now seen corresponding path program 25 times [2019-11-06 21:24:05,355 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:05,356 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183409204] [2019-11-06 21:24:05,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:05,365 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:24:05,365 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107766575] [2019-11-06 21:24:05,365 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:05,463 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 111 conjunts are in the unsatisfiable core [2019-11-06 21:24:05,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:07,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:07,182 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183409204] [2019-11-06 21:24:07,183 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:24:07,183 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107766575] [2019-11-06 21:24:07,183 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:24:07,183 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-11-06 21:24:07,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901424879] [2019-11-06 21:24:07,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-06 21:24:07,183 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:07,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-06 21:24:07,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2019-11-06 21:24:07,185 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 56 states. [2019-11-06 21:24:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:09,057 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-11-06 21:24:09,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-06 21:24:09,058 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 61 [2019-11-06 21:24:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:09,058 INFO L225 Difference]: With dead ends: 69 [2019-11-06 21:24:09,058 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 21:24:09,060 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=118, Invalid=3188, Unknown=0, NotChecked=0, Total=3306 [2019-11-06 21:24:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 21:24:09,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-06 21:24:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 21:24:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-11-06 21:24:09,064 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2019-11-06 21:24:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:09,065 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-11-06 21:24:09,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-06 21:24:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-11-06 21:24:09,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 21:24:09,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:09,066 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:09,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:09,269 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:09,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:09,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1592296501, now seen corresponding path program 26 times [2019-11-06 21:24:09,270 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:09,270 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457081994] [2019-11-06 21:24:09,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:09,280 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:24:09,281 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54663923] [2019-11-06 21:24:09,281 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:09,366 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:24:09,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:24:09,369 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 115 conjunts are in the unsatisfiable core [2019-11-06 21:24:09,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:11,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:11,632 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457081994] [2019-11-06 21:24:11,632 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:24:11,632 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54663923] [2019-11-06 21:24:11,634 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:24:11,635 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-11-06 21:24:11,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828073147] [2019-11-06 21:24:11,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-06 21:24:11,635 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:11,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-06 21:24:11,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2019-11-06 21:24:11,637 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 58 states.