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/cohencu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:21:31,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:21:31,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:21:31,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 12:21:31,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 12:21:31,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 12:21:31,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 12:21:31,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 12:21:31,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 12:21:31,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 12:21:31,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 12:21:31,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 12:21:31,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 12:21:31,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 12:21:31,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 12:21:31,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 12:21:31,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 12:21:31,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 12:21:31,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 12:21:31,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 12:21:31,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 12:21:31,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 12:21:31,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 12:21:31,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 12:21:31,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 12:21:31,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:21:31,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:21:31,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:21:31,096 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 12:21:31,111 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:21:31,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:21:31,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 12:21:31,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 12:21:31,113 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 12:21:31,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:21:31,114 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:21:31,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 12:21:31,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:21:31,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:21:31,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:21:31,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:21:31,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:21:31,115 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:21:31,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:21:31,115 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 12:21:31,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:21:31,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:21:31,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:21:31,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 12:21:31,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 12:21:31,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:21:31,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:21:31,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:21:31,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 12:21:31,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 12:21:31,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:21:31,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:21:31,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 12:21:31,145 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:21:31,156 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:21:31,160 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:21:31,161 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:21:31,161 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:21:31,162 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu.c [2019-09-05 12:21:31,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99f398c48/6b3830ffcf3d4d0d801cd9e35314e7cd/FLAG24791378e [2019-09-05 12:21:31,641 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:21:31,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohencu.c [2019-09-05 12:21:31,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99f398c48/6b3830ffcf3d4d0d801cd9e35314e7cd/FLAG24791378e [2019-09-05 12:21:32,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99f398c48/6b3830ffcf3d4d0d801cd9e35314e7cd [2019-09-05 12:21:32,042 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:21:32,044 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:21:32,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:21:32,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:21:32,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:21:32,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:21:32" (1/1) ... [2019-09-05 12:21:32,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35d2c862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:21:32, skipping insertion in model container [2019-09-05 12:21:32,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:21:32" (1/1) ... [2019-09-05 12:21:32,060 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:21:32,078 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:21:32,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:21:32,287 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:21:32,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:21:32,320 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:21:32,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:21:32 WrapperNode [2019-09-05 12:21:32,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:21:32,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:21:32,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:21:32,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:21:32,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:21:32" (1/1) ... [2019-09-05 12:21:32,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:21:32" (1/1) ... [2019-09-05 12:21:32,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:21:32" (1/1) ... [2019-09-05 12:21:32,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:21:32" (1/1) ... [2019-09-05 12:21:32,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:21:32" (1/1) ... [2019-09-05 12:21:32,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:21:32" (1/1) ... [2019-09-05 12:21:32,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:21:32" (1/1) ... [2019-09-05 12:21:32,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:21:32,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:21:32,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:21:32,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:21:32,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:21:32" (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 12:21:32,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:21:32,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:21:32,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:21:32,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:21:32,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:21:32,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 12:21:32,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 12:21:32,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:21:32,507 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:21:32,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:21:32,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:21:32,675 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:21:32,675 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 12:21:32,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:21:32 BoogieIcfgContainer [2019-09-05 12:21:32,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:21:32,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:21:32,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:21:32,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:21:32,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:21:32" (1/3) ... [2019-09-05 12:21:32,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a9f66b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:21:32, skipping insertion in model container [2019-09-05 12:21:32,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:21:32" (2/3) ... [2019-09-05 12:21:32,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a9f66b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:21:32, skipping insertion in model container [2019-09-05 12:21:32,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:21:32" (3/3) ... [2019-09-05 12:21:32,683 INFO L109 eAbstractionObserver]: Analyzing ICFG cohencu.c [2019-09-05 12:21:32,692 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:21:32,698 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:21:32,714 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:21:32,739 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 12:21:32,740 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:21:32,740 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 12:21:32,740 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:21:32,740 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:21:32,740 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:21:32,741 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:21:32,741 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:21:32,741 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:21:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-05 12:21:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:21:32,761 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:32,762 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:32,764 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:32,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:32,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2145967090, now seen corresponding path program 1 times [2019-09-05 12:21:32,769 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:32,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:32,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:32,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:32,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:32,857 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 12:21:32,859 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:21:32,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:21:32,862 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:21:32,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:21:32,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:21:32,874 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-05 12:21:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:32,899 INFO L93 Difference]: Finished difference Result 53 states and 90 transitions. [2019-09-05 12:21:32,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:21:32,900 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-05 12:21:32,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:32,910 INFO L225 Difference]: With dead ends: 53 [2019-09-05 12:21:32,910 INFO L226 Difference]: Without dead ends: 24 [2019-09-05 12:21:32,914 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 12:21:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-05 12:21:32,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-05 12:21:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-05 12:21:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2019-09-05 12:21:32,959 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2019-09-05 12:21:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:32,959 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2019-09-05 12:21:32,960 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:21:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2019-09-05 12:21:32,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:21:32,960 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:32,961 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:32,961 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2134586928, now seen corresponding path program 1 times [2019-09-05 12:21:32,962 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:32,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:32,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:32,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:32,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:33,286 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2019-09-05 12:21:33,321 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 12:21:33,323 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:21:33,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:21:33,325 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:21:33,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:21:33,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:21:33,326 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 5 states. [2019-09-05 12:21:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:33,428 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2019-09-05 12:21:33,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:21:33,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-05 12:21:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:33,430 INFO L225 Difference]: With dead ends: 30 [2019-09-05 12:21:33,430 INFO L226 Difference]: Without dead ends: 28 [2019-09-05 12:21:33,431 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:21:33,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-05 12:21:33,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-05 12:21:33,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-05 12:21:33,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-09-05 12:21:33,446 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2019-09-05 12:21:33,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:33,446 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-09-05 12:21:33,447 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:21:33,447 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-09-05 12:21:33,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-05 12:21:33,448 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:33,448 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:33,448 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:33,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1496147284, now seen corresponding path program 1 times [2019-09-05 12:21:33,449 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:33,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:33,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:33,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:33,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:33,459 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:33,459 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:33,460 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 12:21:33,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:33,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-05 12:21:33,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:21:33,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:33,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:21:33,613 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:21:33,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:21:33,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:21:33,614 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2019-09-05 12:21:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:34,036 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2019-09-05 12:21:34,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:21:34,038 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-09-05 12:21:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:34,039 INFO L225 Difference]: With dead ends: 51 [2019-09-05 12:21:34,040 INFO L226 Difference]: Without dead ends: 49 [2019-09-05 12:21:34,043 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:21:34,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-05 12:21:34,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-09-05 12:21:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-05 12:21:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2019-09-05 12:21:34,074 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 15 [2019-09-05 12:21:34,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:34,075 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2019-09-05 12:21:34,075 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:21:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2019-09-05 12:21:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-05 12:21:34,076 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:34,076 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:34,077 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:34,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:34,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1472996464, now seen corresponding path program 1 times [2019-09-05 12:21:34,078 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:34,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:34,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:34,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:34,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:34,092 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:34,092 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:34,092 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) [2019-09-05 12:21:34,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:34,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-05 12:21:34,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:21:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-05 12:21:34,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:34,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:21:34,210 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:21:34,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:21:34,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:21:34,211 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand 8 states. [2019-09-05 12:21:34,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:34,559 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2019-09-05 12:21:34,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:21:34,566 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-09-05 12:21:34,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:34,568 INFO L225 Difference]: With dead ends: 55 [2019-09-05 12:21:34,568 INFO L226 Difference]: Without dead ends: 53 [2019-09-05 12:21:34,568 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:21:34,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-05 12:21:34,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-09-05 12:21:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-05 12:21:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2019-09-05 12:21:34,582 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 20 [2019-09-05 12:21:34,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:34,582 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2019-09-05 12:21:34,582 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:21:34,583 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2019-09-05 12:21:34,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-05 12:21:34,583 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:34,584 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:34,584 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:34,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:34,584 INFO L82 PathProgramCache]: Analyzing trace with hash -378433900, now seen corresponding path program 1 times [2019-09-05 12:21:34,585 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:34,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:34,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:34,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:34,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:34,591 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:34,591 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:34,591 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 12:21:34,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:34,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-05 12:21:34,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-05 12:21:34,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:34,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:21:34,690 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:21:34,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:21:34,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:21:34,691 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 8 states. [2019-09-05 12:21:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:35,121 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2019-09-05 12:21:35,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:21:35,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-09-05 12:21:35,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:35,124 INFO L225 Difference]: With dead ends: 59 [2019-09-05 12:21:35,124 INFO L226 Difference]: Without dead ends: 51 [2019-09-05 12:21:35,125 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:21:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-05 12:21:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-05 12:21:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-05 12:21:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-09-05 12:21:35,137 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 25 [2019-09-05 12:21:35,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:35,137 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-09-05 12:21:35,137 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:21:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-09-05 12:21:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-05 12:21:35,138 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:35,139 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:35,139 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:35,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:35,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1836902192, now seen corresponding path program 1 times [2019-09-05 12:21:35,139 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:35,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:35,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:35,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:35,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:35,146 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:35,146 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:35,146 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 12:21:35,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:35,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-05 12:21:35,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-05 12:21:35,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:35,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:21:35,259 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:21:35,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:21:35,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:21:35,260 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 8 states. [2019-09-05 12:21:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:35,592 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2019-09-05 12:21:35,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 12:21:35,594 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-09-05 12:21:35,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:35,596 INFO L225 Difference]: With dead ends: 70 [2019-09-05 12:21:35,596 INFO L226 Difference]: Without dead ends: 68 [2019-09-05 12:21:35,596 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:21:35,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-05 12:21:35,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2019-09-05 12:21:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-05 12:21:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2019-09-05 12:21:35,608 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 42 [2019-09-05 12:21:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:35,609 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2019-09-05 12:21:35,609 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:21:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2019-09-05 12:21:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-05 12:21:35,610 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:35,611 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:35,611 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:35,611 INFO L82 PathProgramCache]: Analyzing trace with hash -223920524, now seen corresponding path program 2 times [2019-09-05 12:21:35,611 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:35,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:35,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:35,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:35,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:35,618 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:35,618 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:35,618 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:21:35,635 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:21:35,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:21:35,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:21:35,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-05 12:21:35,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-05 12:21:35,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:35,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:21:35,733 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:21:35,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:21:35,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:21:35,734 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 9 states. [2019-09-05 12:21:36,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:36,129 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2019-09-05 12:21:36,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 12:21:36,130 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-09-05 12:21:36,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:36,132 INFO L225 Difference]: With dead ends: 78 [2019-09-05 12:21:36,132 INFO L226 Difference]: Without dead ends: 75 [2019-09-05 12:21:36,132 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:21:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-05 12:21:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-09-05 12:21:36,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-05 12:21:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2019-09-05 12:21:36,146 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 47 [2019-09-05 12:21:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:36,146 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2019-09-05 12:21:36,146 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:21:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2019-09-05 12:21:36,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-05 12:21:36,148 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:36,148 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:36,149 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:36,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1224693684, now seen corresponding path program 3 times [2019-09-05 12:21:36,149 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:36,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:36,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:36,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:21:36,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:36,155 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:36,155 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:36,156 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 12:21:36,175 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:21:36,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-05 12:21:36,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:21:36,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-05 12:21:36,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-05 12:21:36,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:36,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-05 12:21:36,225 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 12:21:36,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 12:21:36,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:21:36,226 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 6 states. [2019-09-05 12:21:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:36,354 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2019-09-05 12:21:36,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:21:36,354 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2019-09-05 12:21:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:36,356 INFO L225 Difference]: With dead ends: 85 [2019-09-05 12:21:36,356 INFO L226 Difference]: Without dead ends: 82 [2019-09-05 12:21:36,356 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:21:36,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-05 12:21:36,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-09-05 12:21:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-05 12:21:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2019-09-05 12:21:36,368 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 57 [2019-09-05 12:21:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:36,369 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2019-09-05 12:21:36,369 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 12:21:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2019-09-05 12:21:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-05 12:21:36,370 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:36,371 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:36,371 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:36,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1975458643, now seen corresponding path program 1 times [2019-09-05 12:21:36,371 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:36,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:36,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:36,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:21:36,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:36,377 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:36,378 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:36,378 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 12:21:36,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:36,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-05 12:21:36,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:36,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:21:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:21:36,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:36,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:21:36,513 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:21:36,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:21:36,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:21:36,514 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 9 states. [2019-09-05 12:21:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:36,870 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2019-09-05 12:21:36,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:21:36,871 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2019-09-05 12:21:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:36,872 INFO L225 Difference]: With dead ends: 92 [2019-09-05 12:21:36,873 INFO L226 Difference]: Without dead ends: 90 [2019-09-05 12:21:36,873 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:21:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-05 12:21:36,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-09-05 12:21:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-05 12:21:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2019-09-05 12:21:36,886 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 68 [2019-09-05 12:21:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:36,887 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2019-09-05 12:21:36,887 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:21:36,887 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2019-09-05 12:21:36,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-05 12:21:36,888 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:36,889 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:36,889 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:36,889 INFO L82 PathProgramCache]: Analyzing trace with hash -109766700, now seen corresponding path program 4 times [2019-09-05 12:21:36,889 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:36,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:36,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:36,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:36,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:36,896 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:36,896 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:36,897 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 12:21:36,918 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:21:36,947 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:21:36,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:21:36,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-05 12:21:36,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:37,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:21:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 36 proven. 67 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:21:37,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:37,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:21:37,105 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:21:37,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:21:37,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:21:37,106 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand 9 states. [2019-09-05 12:21:37,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:37,255 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2019-09-05 12:21:37,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:21:37,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2019-09-05 12:21:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:37,257 INFO L225 Difference]: With dead ends: 96 [2019-09-05 12:21:37,257 INFO L226 Difference]: Without dead ends: 94 [2019-09-05 12:21:37,258 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:21:37,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-05 12:21:37,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-09-05 12:21:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-05 12:21:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2019-09-05 12:21:37,286 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 69 [2019-09-05 12:21:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:37,287 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2019-09-05 12:21:37,287 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:21:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2019-09-05 12:21:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-05 12:21:37,289 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:37,289 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:37,290 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:37,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:37,290 INFO L82 PathProgramCache]: Analyzing trace with hash 713083767, now seen corresponding path program 1 times [2019-09-05 12:21:37,290 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:37,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:37,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:37,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:21:37,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:37,302 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:37,303 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:37,303 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) [2019-09-05 12:21:37,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:21:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:37,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-05 12:21:37,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:37,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:21:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-09-05 12:21:37,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:37,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:21:37,521 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:21:37,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:21:37,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:21:37,523 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand 9 states. [2019-09-05 12:21:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:38,056 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2019-09-05 12:21:38,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:21:38,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2019-09-05 12:21:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:38,059 INFO L225 Difference]: With dead ends: 100 [2019-09-05 12:21:38,059 INFO L226 Difference]: Without dead ends: 98 [2019-09-05 12:21:38,060 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:21:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-05 12:21:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-09-05 12:21:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-05 12:21:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2019-09-05 12:21:38,079 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 73 [2019-09-05 12:21:38,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:38,079 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2019-09-05 12:21:38,080 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:21:38,080 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2019-09-05 12:21:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-05 12:21:38,084 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:38,084 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:38,084 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:38,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1693450736, now seen corresponding path program 5 times [2019-09-05 12:21:38,085 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:38,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:38,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:38,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:38,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:38,103 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:38,103 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:38,103 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) [2019-09-05 12:21:38,132 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:21:38,171 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-05 12:21:38,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:21:38,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-05 12:21:38,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 23 proven. 49 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-09-05 12:21:38,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:38,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:21:38,277 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:21:38,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:21:38,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:21:38,278 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 9 states. [2019-09-05 12:21:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:38,673 INFO L93 Difference]: Finished difference Result 117 states and 137 transitions. [2019-09-05 12:21:38,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:21:38,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2019-09-05 12:21:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:38,675 INFO L225 Difference]: With dead ends: 117 [2019-09-05 12:21:38,675 INFO L226 Difference]: Without dead ends: 103 [2019-09-05 12:21:38,676 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:21:38,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-05 12:21:38,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2019-09-05 12:21:38,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-05 12:21:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2019-09-05 12:21:38,686 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 74 [2019-09-05 12:21:38,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:38,687 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2019-09-05 12:21:38,687 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:21:38,687 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2019-09-05 12:21:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-05 12:21:38,688 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:38,688 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:38,689 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:38,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:38,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1818484460, now seen corresponding path program 6 times [2019-09-05 12:21:38,689 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:38,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:38,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:38,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:21:38,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:38,695 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:38,695 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:38,695 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 12:21:38,722 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:21:38,909 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-05 12:21:38,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:21:38,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-05 12:21:38,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-09-05 12:21:39,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:39,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:21:39,018 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:21:39,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:21:39,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:21:39,018 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 10 states. [2019-09-05 12:21:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:39,435 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2019-09-05 12:21:39,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:21:39,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2019-09-05 12:21:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:39,437 INFO L225 Difference]: With dead ends: 117 [2019-09-05 12:21:39,437 INFO L226 Difference]: Without dead ends: 112 [2019-09-05 12:21:39,438 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:21:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-05 12:21:39,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-09-05 12:21:39,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-09-05 12:21:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2019-09-05 12:21:39,449 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 79 [2019-09-05 12:21:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:39,450 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2019-09-05 12:21:39,450 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:21:39,450 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2019-09-05 12:21:39,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-05 12:21:39,451 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:39,451 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:39,451 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:39,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:39,452 INFO L82 PathProgramCache]: Analyzing trace with hash -622434639, now seen corresponding path program 2 times [2019-09-05 12:21:39,452 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:39,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:39,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:39,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:21:39,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:39,457 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:39,458 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:39,458 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) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:21:39,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:21:39,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:21:39,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:21:39,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-05 12:21:39,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:39,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:21:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-09-05 12:21:39,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:39,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:21:39,634 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:21:39,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:21:39,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:21:39,634 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand 10 states. [2019-09-05 12:21:40,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:40,038 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2019-09-05 12:21:40,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:21:40,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 95 [2019-09-05 12:21:40,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:40,040 INFO L225 Difference]: With dead ends: 118 [2019-09-05 12:21:40,040 INFO L226 Difference]: Without dead ends: 116 [2019-09-05 12:21:40,040 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:21:40,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-05 12:21:40,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-09-05 12:21:40,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-05 12:21:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2019-09-05 12:21:40,052 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 95 [2019-09-05 12:21:40,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:40,052 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2019-09-05 12:21:40,052 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:21:40,053 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2019-09-05 12:21:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-05 12:21:40,054 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:40,054 INFO L399 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:40,054 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1439689715, now seen corresponding path program 2 times [2019-09-05 12:21:40,055 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:40,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:40,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:40,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:21:40,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:40,060 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:40,061 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:40,061 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) [2019-09-05 12:21:40,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:21:40,112 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:21:40,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:21:40,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-05 12:21:40,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:40,189 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:21:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 33 proven. 70 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-09-05 12:21:40,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:40,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:21:40,238 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:21:40,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:21:40,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:21:40,240 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand 10 states. [2019-09-05 12:21:40,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:40,638 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2019-09-05 12:21:40,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:21:40,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 100 [2019-09-05 12:21:40,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:40,639 INFO L225 Difference]: With dead ends: 126 [2019-09-05 12:21:40,639 INFO L226 Difference]: Without dead ends: 113 [2019-09-05 12:21:40,640 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:21:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-09-05 12:21:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-09-05 12:21:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-09-05 12:21:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2019-09-05 12:21:40,650 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 100 [2019-09-05 12:21:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:40,650 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2019-09-05 12:21:40,650 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:21:40,651 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2019-09-05 12:21:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-05 12:21:40,652 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:40,652 INFO L399 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:40,652 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:40,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1551568652, now seen corresponding path program 7 times [2019-09-05 12:21:40,652 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:40,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:40,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:40,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:21:40,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:40,658 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:40,658 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:40,658 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:21:40,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:40,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-05 12:21:40,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 33 proven. 82 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:21:40,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:40,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:21:40,802 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:21:40,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:21:40,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:21:40,807 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 10 states. [2019-09-05 12:21:41,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:41,325 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2019-09-05 12:21:41,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:21:41,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 101 [2019-09-05 12:21:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:41,327 INFO L225 Difference]: With dead ends: 132 [2019-09-05 12:21:41,327 INFO L226 Difference]: Without dead ends: 130 [2019-09-05 12:21:41,328 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:21:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-09-05 12:21:41,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2019-09-05 12:21:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-05 12:21:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2019-09-05 12:21:41,337 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 101 [2019-09-05 12:21:41,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:41,338 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2019-09-05 12:21:41,338 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:21:41,338 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2019-09-05 12:21:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-05 12:21:41,339 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:41,339 INFO L399 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:41,340 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:41,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:41,340 INFO L82 PathProgramCache]: Analyzing trace with hash 781710480, now seen corresponding path program 8 times [2019-09-05 12:21:41,340 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:41,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:41,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:41,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:41,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:41,345 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:41,345 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:41,346 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 12:21:41,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:21:41,392 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:21:41,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:21:41,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-05 12:21:41,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 80 proven. 43 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-09-05 12:21:41,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:41,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-05 12:21:41,520 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-05 12:21:41,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-05 12:21:41,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:21:41,521 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 11 states. [2019-09-05 12:21:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:42,030 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2019-09-05 12:21:42,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:21:42,030 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 106 [2019-09-05 12:21:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:42,032 INFO L225 Difference]: With dead ends: 144 [2019-09-05 12:21:42,032 INFO L226 Difference]: Without dead ends: 139 [2019-09-05 12:21:42,032 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:21:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-09-05 12:21:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-09-05 12:21:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-09-05 12:21:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 151 transitions. [2019-09-05 12:21:42,044 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 151 transitions. Word has length 106 [2019-09-05 12:21:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:42,044 INFO L475 AbstractCegarLoop]: Abstraction has 139 states and 151 transitions. [2019-09-05 12:21:42,044 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-05 12:21:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 151 transitions. [2019-09-05 12:21:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-09-05 12:21:42,046 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:42,046 INFO L399 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:42,046 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:42,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:42,046 INFO L82 PathProgramCache]: Analyzing trace with hash 874758701, now seen corresponding path program 3 times [2019-09-05 12:21:42,047 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:42,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:42,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:42,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:21:42,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:42,052 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:21:42,052 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:21:42,052 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:21:42,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2