java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:30:37,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:30:37,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:30:37,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 12:30:37,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 12:30:37,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 12:30:37,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 12:30:37,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 12:30:37,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 12:30:37,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 12:30:37,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 12:30:37,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 12:30:37,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 12:30:37,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 12:30:37,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 12:30:37,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 12:30:37,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 12:30:37,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 12:30:37,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 12:30:37,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 12:30:37,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 12:30:37,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 12:30:37,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 12:30:37,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 12:30:37,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 12:30:37,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:30:37,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:30:37,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:30:37,155 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 [2019-09-05 12:30:37,188 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:30:37,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:30:37,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 12:30:37,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 12:30:37,193 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 12:30:37,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:30:37,194 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:30:37,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 12:30:37,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:30:37,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:30:37,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:30:37,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:30:37,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:30:37,200 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:30:37,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:30:37,201 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 12:30:37,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:30:37,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:30:37,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:30:37,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 12:30:37,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 12:30:37,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:30:37,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:30:37,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:30:37,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 12:30:37,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 12:30:37,203 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:30:37,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:30:37,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 12:30:37,246 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:30:37,258 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:30:37,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:30:37,263 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:30:37,263 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:30:37,264 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps5.c [2019-09-05 12:30:37,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7863dfa31/8dd7975bdf334552b69c9598ca724ed1/FLAGcef97354e [2019-09-05 12:30:37,722 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:30:37,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps5.c [2019-09-05 12:30:37,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7863dfa31/8dd7975bdf334552b69c9598ca724ed1/FLAGcef97354e [2019-09-05 12:30:38,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7863dfa31/8dd7975bdf334552b69c9598ca724ed1 [2019-09-05 12:30:38,141 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:30:38,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:30:38,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:30:38,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:30:38,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:30:38,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:30:38" (1/1) ... [2019-09-05 12:30:38,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1d362a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:30:38, skipping insertion in model container [2019-09-05 12:30:38,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:30:38" (1/1) ... [2019-09-05 12:30:38,156 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:30:38,169 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:30:38,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:30:38,332 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:30:38,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:30:38,381 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:30:38,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:30:38 WrapperNode [2019-09-05 12:30:38,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:30:38,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:30:38,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:30:38,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:30:38,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:30:38" (1/1) ... [2019-09-05 12:30:38,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:30:38" (1/1) ... [2019-09-05 12:30:38,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:30:38" (1/1) ... [2019-09-05 12:30:38,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:30:38" (1/1) ... [2019-09-05 12:30:38,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:30:38" (1/1) ... [2019-09-05 12:30:38,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:30:38" (1/1) ... [2019-09-05 12:30:38,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:30:38" (1/1) ... [2019-09-05 12:30:38,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:30:38,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:30:38,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:30:38,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:30:38,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:30:38" (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 [2019-09-05 12:30:38,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:30:38,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:30:38,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:30:38,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:30:38,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:30:38,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 12:30:38,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 12:30:38,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:30:38,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:30:38,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:30:38,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:30:38,708 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:30:38,708 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 12:30:38,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:30:38 BoogieIcfgContainer [2019-09-05 12:30:38,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:30:38,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:30:38,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:30:38,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:30:38,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:30:38" (1/3) ... [2019-09-05 12:30:38,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37480ef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:30:38, skipping insertion in model container [2019-09-05 12:30:38,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:30:38" (2/3) ... [2019-09-05 12:30:38,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37480ef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:30:38, skipping insertion in model container [2019-09-05 12:30:38,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:30:38" (3/3) ... [2019-09-05 12:30:38,718 INFO L109 eAbstractionObserver]: Analyzing ICFG ps5.c [2019-09-05 12:30:38,730 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:30:38,752 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:30:38,794 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:30:38,844 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 12:30:38,845 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:30:38,845 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 12:30:38,845 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:30:38,845 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:30:38,845 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:30:38,845 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:30:38,846 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:30:38,846 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:30:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-05 12:30:38,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:30:38,866 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:38,867 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:38,869 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:38,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:38,873 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-09-05 12:30:38,874 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:38,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:38,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:38,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:38,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:30:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:30:38,977 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:30:38,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:30:38,981 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:30:38,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:30:38,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:30:38,992 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-05 12:30:39,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:39,016 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-09-05 12:30:39,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:30:39,017 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-05 12:30:39,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:39,025 INFO L225 Difference]: With dead ends: 37 [2019-09-05 12:30:39,026 INFO L226 Difference]: Without dead ends: 16 [2019-09-05 12:30:39,029 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:30:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-05 12:30:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-05 12:30:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-05 12:30:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-05 12:30:39,066 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-05 12:30:39,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:39,066 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-05 12:30:39,067 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:30:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-05 12:30:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:30:39,068 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:39,068 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:39,069 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:39,069 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-09-05 12:30:39,069 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:39,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:39,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:39,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:39,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:39,077 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:39,077 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:39,077 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:30:39,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:30:39,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-05 12:30:39,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:30:39,186 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:30:39,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:30:39,188 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:30:39,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:30:39,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:30:39,189 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-05 12:30:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:39,384 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-05 12:30:39,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:30:39,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-05 12:30:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:39,386 INFO L225 Difference]: With dead ends: 27 [2019-09-05 12:30:39,386 INFO L226 Difference]: Without dead ends: 23 [2019-09-05 12:30:39,387 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:30:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-05 12:30:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-05 12:30:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-05 12:30:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-05 12:30:39,396 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-09-05 12:30:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:39,397 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-05 12:30:39,397 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:30:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-05 12:30:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-05 12:30:39,398 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:39,399 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:39,399 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:39,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:39,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-09-05 12:30:39,400 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:39,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:39,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:39,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:39,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:39,406 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:39,406 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:39,406 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:30:39,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:30:39,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-05 12:30:39,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:30:39,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:39,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:30:39,553 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:30:39,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:30:39,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:30:39,556 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-09-05 12:30:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:39,724 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-09-05 12:30:39,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 12:30:39,725 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-09-05 12:30:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:39,726 INFO L225 Difference]: With dead ends: 34 [2019-09-05 12:30:39,726 INFO L226 Difference]: Without dead ends: 32 [2019-09-05 12:30:39,727 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:30:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-05 12:30:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-05 12:30:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-05 12:30:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-05 12:30:39,736 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2019-09-05 12:30:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:39,737 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-05 12:30:39,737 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:30:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-05 12:30:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-05 12:30:39,738 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:39,739 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:39,739 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:39,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:39,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1905380040, now seen corresponding path program 2 times [2019-09-05 12:30:39,739 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:39,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:39,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:39,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:39,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:39,745 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:39,745 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:39,746 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:30:39,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:30:39,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:30:39,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:39,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 12:30:39,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-05 12:30:39,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:39,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:30:39,885 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:30:39,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:30:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:30:39,887 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2019-09-05 12:30:40,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:40,467 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-09-05 12:30:40,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:30:40,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-09-05 12:30:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:40,469 INFO L225 Difference]: With dead ends: 43 [2019-09-05 12:30:40,469 INFO L226 Difference]: Without dead ends: 41 [2019-09-05 12:30:40,470 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:30:40,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-05 12:30:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-09-05 12:30:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-05 12:30:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-09-05 12:30:40,480 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2019-09-05 12:30:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:40,480 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-09-05 12:30:40,480 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:30:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-09-05 12:30:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-05 12:30:40,481 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:40,482 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:40,482 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:40,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:40,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1054216485, now seen corresponding path program 1 times [2019-09-05 12:30:40,482 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:40,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:40,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:40,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:40,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:40,487 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:40,487 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:40,488 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:30:40,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:30:40,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-05 12:30:40,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:40,590 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-05 12:30:40,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:40,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:30:40,634 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:30:40,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:30:40,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:30:40,635 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 9 states. [2019-09-05 12:30:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:40,773 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-09-05 12:30:40,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:30:40,773 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2019-09-05 12:30:40,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:40,776 INFO L225 Difference]: With dead ends: 46 [2019-09-05 12:30:40,776 INFO L226 Difference]: Without dead ends: 38 [2019-09-05 12:30:40,777 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:30:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-05 12:30:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-05 12:30:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-05 12:30:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-09-05 12:30:40,785 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2019-09-05 12:30:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:40,785 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-09-05 12:30:40,786 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:30:40,786 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-09-05 12:30:40,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-05 12:30:40,787 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:40,787 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:40,787 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:40,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:40,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1107083552, now seen corresponding path program 3 times [2019-09-05 12:30:40,788 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:40,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:40,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:40,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:40,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:40,793 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:40,793 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:40,793 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:30:40,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:40,823 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-05 12:30:40,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:40,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 12:30:40,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:40,993 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-09-05 12:30:43,066 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:30:43,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:43,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:30:43,366 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:30:43,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:30:43,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2019-09-05 12:30:43,367 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2019-09-05 12:30:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:44,263 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2019-09-05 12:30:44,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:30:44,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-09-05 12:30:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:44,265 INFO L225 Difference]: With dead ends: 44 [2019-09-05 12:30:44,265 INFO L226 Difference]: Without dead ends: 40 [2019-09-05 12:30:44,266 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=26, Invalid=63, Unknown=1, NotChecked=0, Total=90 [2019-09-05 12:30:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-05 12:30:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2019-09-05 12:30:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-05 12:30:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-09-05 12:30:44,276 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 31 [2019-09-05 12:30:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:44,276 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-09-05 12:30:44,277 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:30:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-09-05 12:30:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-05 12:30:44,278 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:44,278 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:44,278 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:44,278 INFO L82 PathProgramCache]: Analyzing trace with hash 787245325, now seen corresponding path program 2 times [2019-09-05 12:30:44,278 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:44,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:44,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:44,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:44,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:44,283 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:44,283 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:44,283 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:30:44,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:30:44,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:30:44,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:44,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-05 12:30:44,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:44,389 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-05 12:30:44,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:44,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:30:44,414 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:30:44,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:30:44,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:30:44,414 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 10 states. [2019-09-05 12:30:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:44,593 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2019-09-05 12:30:44,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:30:44,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-09-05 12:30:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:44,595 INFO L225 Difference]: With dead ends: 41 [2019-09-05 12:30:44,595 INFO L226 Difference]: Without dead ends: 35 [2019-09-05 12:30:44,596 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:30:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-05 12:30:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-05 12:30:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-05 12:30:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-09-05 12:30:44,608 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 35 [2019-09-05 12:30:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:44,609 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-09-05 12:30:44,609 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:30:44,609 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-09-05 12:30:44,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-05 12:30:44,610 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:44,611 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:44,611 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:44,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:44,612 INFO L82 PathProgramCache]: Analyzing trace with hash -999891931, now seen corresponding path program 3 times [2019-09-05 12:30:44,612 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:44,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:44,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:44,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:44,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:44,618 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:44,618 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:44,618 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:30:44,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:30:44,736 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-05 12:30:44,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:44,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-05 12:30:44,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:44,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-05 12:30:44,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:44,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-05 12:30:44,943 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-05 12:30:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-05 12:30:44,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:30:44,944 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2019-09-05 12:30:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:45,142 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2019-09-05 12:30:45,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 12:30:45,143 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2019-09-05 12:30:45,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:45,144 INFO L225 Difference]: With dead ends: 44 [2019-09-05 12:30:45,144 INFO L226 Difference]: Without dead ends: 38 [2019-09-05 12:30:45,145 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:30:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-05 12:30:45,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-05 12:30:45,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-05 12:30:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-09-05 12:30:45,164 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 42 [2019-09-05 12:30:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:45,164 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-09-05 12:30:45,166 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-05 12:30:45,166 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-09-05 12:30:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-05 12:30:45,170 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:45,170 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:45,171 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:45,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:45,171 INFO L82 PathProgramCache]: Analyzing trace with hash -705610227, now seen corresponding path program 4 times [2019-09-05 12:30:45,171 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:45,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:45,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:45,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:45,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:45,176 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:45,176 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:45,176 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:30:45,192 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:30:45,214 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:30:45,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:45,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-05 12:30:45,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:45,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-05 12:30:45,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:45,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-05 12:30:45,339 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-05 12:30:45,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-05 12:30:45,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:30:45,340 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2019-09-05 12:30:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:45,514 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-09-05 12:30:45,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-05 12:30:45,515 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-09-05 12:30:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:45,516 INFO L225 Difference]: With dead ends: 47 [2019-09-05 12:30:45,516 INFO L226 Difference]: Without dead ends: 41 [2019-09-05 12:30:45,516 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:30:45,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-05 12:30:45,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-05 12:30:45,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-05 12:30:45,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-09-05 12:30:45,528 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 49 [2019-09-05 12:30:45,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:45,528 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-09-05 12:30:45,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-05 12:30:45,528 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-09-05 12:30:45,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-05 12:30:45,529 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:45,530 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:45,530 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:45,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1261987621, now seen corresponding path program 5 times [2019-09-05 12:30:45,530 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:45,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:45,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:45,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:45,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:45,535 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:45,535 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:45,535 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:30:45,557 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:31:17,187 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-05 12:31:17,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:31:17,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-05 12:31:17,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:31:17,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:31:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-05 12:31:17,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:31:17,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-05 12:31:17,340 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:31:17,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:31:17,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:31:17,341 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2019-09-05 12:31:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:31:17,598 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-09-05 12:31:17,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 12:31:17,599 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-09-05 12:31:17,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:31:17,600 INFO L225 Difference]: With dead ends: 50 [2019-09-05 12:31:17,601 INFO L226 Difference]: Without dead ends: 44 [2019-09-05 12:31:17,602 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:31:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-05 12:31:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-05 12:31:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-05 12:31:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2019-09-05 12:31:17,614 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 56 [2019-09-05 12:31:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:31:17,614 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2019-09-05 12:31:17,614 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:31:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2019-09-05 12:31:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-05 12:31:17,616 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:31:17,616 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:31:17,616 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:31:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:31:17,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1969050381, now seen corresponding path program 6 times [2019-09-05 12:31:17,617 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:31:17,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:31:17,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:17,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:31:17,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:17,621 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:31:17,621 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:31:17,621 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:31:17,640 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:31:17,756 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-05 12:31:17,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:31:17,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-05 12:31:17,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:31:17,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:31:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:31:17,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:31:17,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-05 12:31:17,972 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:31:17,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:31:17,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:31:17,973 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 15 states. [2019-09-05 12:31:18,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:31:18,254 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2019-09-05 12:31:18,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 12:31:18,259 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-09-05 12:31:18,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:31:18,260 INFO L225 Difference]: With dead ends: 53 [2019-09-05 12:31:18,261 INFO L226 Difference]: Without dead ends: 47 [2019-09-05 12:31:18,261 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:31:18,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-05 12:31:18,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-05 12:31:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-05 12:31:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-09-05 12:31:18,273 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 63 [2019-09-05 12:31:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:31:18,274 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-09-05 12:31:18,274 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:31:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-09-05 12:31:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-05 12:31:18,275 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:31:18,275 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:31:18,276 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:31:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:31:18,276 INFO L82 PathProgramCache]: Analyzing trace with hash 855290405, now seen corresponding path program 7 times [2019-09-05 12:31:18,276 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:31:18,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:31:18,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:18,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:31:18,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:18,281 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:31:18,282 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:31:18,282 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:31:18,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:31:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:31:18,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2019-09-05 12:31:18,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:31:18,494 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:31:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 17 proven. 109 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-09-05 12:31:18,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:31:18,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-05 12:31:18,534 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:31:18,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:31:18,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:31:18,535 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 15 states. [2019-09-05 12:31:18,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:31:18,832 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2019-09-05 12:31:18,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-05 12:31:18,832 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2019-09-05 12:31:18,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:31:18,834 INFO L225 Difference]: With dead ends: 56 [2019-09-05 12:31:18,834 INFO L226 Difference]: Without dead ends: 50 [2019-09-05 12:31:18,835 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:31:18,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-05 12:31:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-09-05 12:31:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-05 12:31:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2019-09-05 12:31:18,847 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 70 [2019-09-05 12:31:18,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:31:18,847 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2019-09-05 12:31:18,848 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:31:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2019-09-05 12:31:18,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-05 12:31:18,849 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:31:18,849 INFO L399 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:31:18,850 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:31:18,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:31:18,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1484740595, now seen corresponding path program 8 times [2019-09-05 12:31:18,850 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:31:18,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:31:18,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:18,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:31:18,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:18,855 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:31:18,855 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:31:18,855 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:31:18,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:31:18,907 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:31:18,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:31:18,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-05 12:31:18,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:31:19,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:31:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 19 proven. 136 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-09-05 12:31:19,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:31:19,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-05 12:31:19,119 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 12:31:19,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 12:31:19,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:31:19,119 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 16 states. [2019-09-05 12:31:19,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:31:19,471 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-09-05 12:31:19,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 12:31:19,472 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2019-09-05 12:31:19,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:31:19,473 INFO L225 Difference]: With dead ends: 59 [2019-09-05 12:31:19,473 INFO L226 Difference]: Without dead ends: 53 [2019-09-05 12:31:19,474 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:31:19,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-05 12:31:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-09-05 12:31:19,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-05 12:31:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-09-05 12:31:19,486 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 77 [2019-09-05 12:31:19,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:31:19,486 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-09-05 12:31:19,486 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 12:31:19,486 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-09-05 12:31:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-05 12:31:19,488 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:31:19,488 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:31:19,488 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:31:19,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:31:19,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1487028955, now seen corresponding path program 9 times [2019-09-05 12:31:19,489 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:31:19,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:31:19,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:19,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:31:19,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:19,494 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:31:19,494 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:31:19,494 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:31:19,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:36:53,864 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-05 12:36:53,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:36:53,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 54 conjunts are in the unsatisfiable core [2019-09-05 12:36:53,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:36:54,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:36:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 21 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-09-05 12:36:54,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:36:54,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-05 12:36:54,144 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-05 12:36:54,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-05 12:36:54,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:36:54,145 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 18 states. [2019-09-05 12:36:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:36:54,591 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2019-09-05 12:36:54,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:36:54,592 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2019-09-05 12:36:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:36:54,593 INFO L225 Difference]: With dead ends: 62 [2019-09-05 12:36:54,593 INFO L226 Difference]: Without dead ends: 56 [2019-09-05 12:36:54,594 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:36:54,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-05 12:36:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-09-05 12:36:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-05 12:36:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2019-09-05 12:36:54,606 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 84 [2019-09-05 12:36:54,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:36:54,606 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2019-09-05 12:36:54,607 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-05 12:36:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2019-09-05 12:36:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-05 12:36:54,608 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:36:54,608 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:36:54,608 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:36:54,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:36:54,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1163182835, now seen corresponding path program 10 times [2019-09-05 12:36:54,609 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:36:54,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:36:54,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:54,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:36:54,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:54,613 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:36:54,613 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:36:54,613 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:36:54,640 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:36:54,680 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:36:54,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:36:54,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 56 conjunts are in the unsatisfiable core [2019-09-05 12:36:54,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:36:54,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:36:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 23 proven. 199 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-09-05 12:36:54,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:36:54,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-05 12:36:54,885 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-05 12:36:54,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-05 12:36:54,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:36:54,886 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 18 states. [2019-09-05 12:36:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:36:55,297 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2019-09-05 12:36:55,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-05 12:36:55,298 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-09-05 12:36:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:36:55,300 INFO L225 Difference]: With dead ends: 65 [2019-09-05 12:36:55,300 INFO L226 Difference]: Without dead ends: 59 [2019-09-05 12:36:55,300 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:36:55,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-05 12:36:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-05 12:36:55,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-05 12:36:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2019-09-05 12:36:55,311 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 91 [2019-09-05 12:36:55,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:36:55,312 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2019-09-05 12:36:55,312 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-05 12:36:55,312 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2019-09-05 12:36:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-05 12:36:55,313 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:36:55,313 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:36:55,314 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:36:55,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:36:55,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1609463771, now seen corresponding path program 11 times [2019-09-05 12:36:55,314 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:36:55,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:36:55,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:55,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:36:55,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:55,319 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:36:55,319 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:36:55,319 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:36:55,341 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1