/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-pthread/cs_peterson.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:46:41,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:46:41,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:46:42,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:46:42,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:46:42,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:46:42,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:46:42,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:46:42,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:46:42,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:46:42,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:46:42,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:46:42,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:46:42,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:46:42,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:46:42,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:46:42,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:46:42,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:46:42,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:46:42,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:46:42,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:46:42,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:46:42,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:46:42,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:46:42,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:46:42,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:46:42,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:46:42,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:46:42,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:46:42,098 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:46:42,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:46:42,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:46:42,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:46:42,101 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:46:42,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:46:42,101 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:46:42,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:46:42,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:46:42,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:46:42,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:46:42,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:46:42,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:46:42,104 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:46:42,104 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:46:42,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:46:42,104 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:46:42,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:46:42,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:46:42,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:46:42,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:46:42,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:46:42,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:46:42,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:46:42,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:46:42,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:46:42,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:46:42,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:46:42,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:46:42,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:46:42,386 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:46:42,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:46:42,403 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:46:42,405 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:46:42,405 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:46:42,406 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-pthread/cs_peterson.i [2019-11-23 22:46:42,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9acec8ba9/c5c6ae9101a14751a384ef94536c56cf/FLAG4ddd390fe [2019-11-23 22:46:42,992 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:46:42,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-pthread/cs_peterson.i [2019-11-23 22:46:43,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9acec8ba9/c5c6ae9101a14751a384ef94536c56cf/FLAG4ddd390fe [2019-11-23 22:46:43,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9acec8ba9/c5c6ae9101a14751a384ef94536c56cf [2019-11-23 22:46:43,291 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:46:43,293 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:46:43,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:46:43,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:46:43,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:46:43,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:46:43" (1/1) ... [2019-11-23 22:46:43,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6016e8ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:43, skipping insertion in model container [2019-11-23 22:46:43,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:46:43" (1/1) ... [2019-11-23 22:46:43,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:46:43,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:46:44,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:46:44,044 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:46:44,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:46:44,270 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:46:44,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:44 WrapperNode [2019-11-23 22:46:44,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:46:44,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:46:44,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:46:44,273 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:46:44,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:44" (1/1) ... [2019-11-23 22:46:44,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:44" (1/1) ... [2019-11-23 22:46:44,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:46:44,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:46:44,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:46:44,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:46:44,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:44" (1/1) ... [2019-11-23 22:46:44,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:44" (1/1) ... [2019-11-23 22:46:44,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:44" (1/1) ... [2019-11-23 22:46:44,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:44" (1/1) ... [2019-11-23 22:46:44,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:44" (1/1) ... [2019-11-23 22:46:44,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:44" (1/1) ... [2019-11-23 22:46:44,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:44" (1/1) ... [2019-11-23 22:46:44,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:46:44,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:46:44,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:46:44,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:46:44,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:46:44,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:46:44,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:46:44,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-23 22:46:44,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:46:44,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-23 22:46:44,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:46:44,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-23 22:46:44,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-23 22:46:44,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:46:44,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:46:48,124 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:46:48,125 INFO L284 CfgBuilder]: Removed 74 assume(true) statements. [2019-11-23 22:46:48,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:46:48 BoogieIcfgContainer [2019-11-23 22:46:48,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:46:48,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:46:48,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:46:48,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:46:48,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:46:43" (1/3) ... [2019-11-23 22:46:48,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed80938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:46:48, skipping insertion in model container [2019-11-23 22:46:48,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:44" (2/3) ... [2019-11-23 22:46:48,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed80938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:46:48, skipping insertion in model container [2019-11-23 22:46:48,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:46:48" (3/3) ... [2019-11-23 22:46:48,136 INFO L109 eAbstractionObserver]: Analyzing ICFG cs_peterson.i [2019-11-23 22:46:48,146 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:46:48,153 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:46:48,165 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:46:48,189 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:46:48,189 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:46:48,190 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:46:48,190 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:46:48,190 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:46:48,190 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:46:48,190 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:46:48,190 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:46:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states. [2019-11-23 22:46:48,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:46:48,213 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:48,214 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:48,214 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:48,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:48,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1639723903, now seen corresponding path program 1 times [2019-11-23 22:46:48,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:48,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125461624] [2019-11-23 22:46:48,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:46:48,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125461624] [2019-11-23 22:46:48,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:48,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:46:48,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684530271] [2019-11-23 22:46:48,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:46:48,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:48,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:46:48,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:46:48,564 INFO L87 Difference]: Start difference. First operand 116 states. Second operand 3 states. [2019-11-23 22:46:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:48,650 INFO L93 Difference]: Finished difference Result 234 states and 378 transitions. [2019-11-23 22:46:48,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:46:48,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 22:46:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:48,669 INFO L225 Difference]: With dead ends: 234 [2019-11-23 22:46:48,671 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 22:46:48,677 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:46:48,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 22:46:48,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2019-11-23 22:46:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-23 22:46:48,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2019-11-23 22:46:48,744 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 12 [2019-11-23 22:46:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:48,744 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2019-11-23 22:46:48,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:46:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2019-11-23 22:46:48,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:46:48,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:48,749 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:48,749 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:48,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:48,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1335455317, now seen corresponding path program 1 times [2019-11-23 22:46:48,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:48,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555374396] [2019-11-23 22:46:48,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:46:48,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555374396] [2019-11-23 22:46:48,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:48,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:46:48,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547662152] [2019-11-23 22:46:48,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:46:48,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:48,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:46:48,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:46:48,851 INFO L87 Difference]: Start difference. First operand 113 states and 180 transitions. Second operand 3 states. [2019-11-23 22:46:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:48,911 INFO L93 Difference]: Finished difference Result 225 states and 360 transitions. [2019-11-23 22:46:48,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:46:48,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-23 22:46:48,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:48,914 INFO L225 Difference]: With dead ends: 225 [2019-11-23 22:46:48,915 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 22:46:48,916 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:46:48,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 22:46:48,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 22:46:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 22:46:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 181 transitions. [2019-11-23 22:46:48,936 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 181 transitions. Word has length 15 [2019-11-23 22:46:48,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:48,936 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 181 transitions. [2019-11-23 22:46:48,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:46:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 181 transitions. [2019-11-23 22:46:48,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:46:48,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:48,938 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:48,939 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:48,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:48,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1209488173, now seen corresponding path program 1 times [2019-11-23 22:46:48,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:48,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991344659] [2019-11-23 22:46:48,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:46:49,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991344659] [2019-11-23 22:46:49,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:49,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:46:49,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383700229] [2019-11-23 22:46:49,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:46:49,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:49,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:46:49,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:46:49,298 INFO L87 Difference]: Start difference. First operand 114 states and 181 transitions. Second operand 4 states. [2019-11-23 22:46:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:49,376 INFO L93 Difference]: Finished difference Result 201 states and 320 transitions. [2019-11-23 22:46:49,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:46:49,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 22:46:49,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:49,378 INFO L225 Difference]: With dead ends: 201 [2019-11-23 22:46:49,379 INFO L226 Difference]: Without dead ends: 190 [2019-11-23 22:46:49,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:46:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-11-23 22:46:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2019-11-23 22:46:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-11-23 22:46:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 300 transitions. [2019-11-23 22:46:49,393 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 300 transitions. Word has length 17 [2019-11-23 22:46:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:49,393 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 300 transitions. [2019-11-23 22:46:49,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:46:49,394 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 300 transitions. [2019-11-23 22:46:49,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:46:49,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:49,396 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:49,396 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:49,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:49,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1684253607, now seen corresponding path program 1 times [2019-11-23 22:46:49,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:49,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975117619] [2019-11-23 22:46:49,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:46:49,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975117619] [2019-11-23 22:46:49,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:49,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:46:49,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468278637] [2019-11-23 22:46:49,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:46:49,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:46:49,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:46:49,513 INFO L87 Difference]: Start difference. First operand 190 states and 300 transitions. Second operand 3 states. [2019-11-23 22:46:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:51,797 INFO L93 Difference]: Finished difference Result 537 states and 852 transitions. [2019-11-23 22:46:51,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:46:51,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2019-11-23 22:46:51,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:51,802 INFO L225 Difference]: With dead ends: 537 [2019-11-23 22:46:51,802 INFO L226 Difference]: Without dead ends: 366 [2019-11-23 22:46:51,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:46:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2019-11-23 22:46:51,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 323. [2019-11-23 22:46:51,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2019-11-23 22:46:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 506 transitions. [2019-11-23 22:46:51,835 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 506 transitions. Word has length 38 [2019-11-23 22:46:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:51,836 INFO L462 AbstractCegarLoop]: Abstraction has 323 states and 506 transitions. [2019-11-23 22:46:51,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:46:51,836 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 506 transitions. [2019-11-23 22:46:51,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:46:51,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:51,840 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:51,840 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:51,840 INFO L82 PathProgramCache]: Analyzing trace with hash -663185253, now seen corresponding path program 1 times [2019-11-23 22:46:51,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:51,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165501870] [2019-11-23 22:46:51,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:53,023 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2019-11-23 22:46:53,164 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2019-11-23 22:46:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:46:53,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165501870] [2019-11-23 22:46:53,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:53,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 22:46:53,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952742980] [2019-11-23 22:46:53,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:46:53,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:53,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:46:53,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:46:53,201 INFO L87 Difference]: Start difference. First operand 323 states and 506 transitions. Second operand 6 states. [2019-11-23 22:46:55,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:55,881 INFO L93 Difference]: Finished difference Result 386 states and 596 transitions. [2019-11-23 22:46:55,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:46:55,882 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-11-23 22:46:55,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:55,885 INFO L225 Difference]: With dead ends: 386 [2019-11-23 22:46:55,886 INFO L226 Difference]: Without dead ends: 332 [2019-11-23 22:46:55,887 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:46:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-11-23 22:46:55,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 331. [2019-11-23 22:46:55,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2019-11-23 22:46:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 516 transitions. [2019-11-23 22:46:55,906 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 516 transitions. Word has length 38 [2019-11-23 22:46:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:55,907 INFO L462 AbstractCegarLoop]: Abstraction has 331 states and 516 transitions. [2019-11-23 22:46:55,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:46:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 516 transitions. [2019-11-23 22:46:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:46:55,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:55,911 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:55,911 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:55,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:55,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1193835221, now seen corresponding path program 1 times [2019-11-23 22:46:55,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:55,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192172790] [2019-11-23 22:46:55,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:46:56,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192172790] [2019-11-23 22:46:56,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:56,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:46:56,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370255760] [2019-11-23 22:46:56,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:46:56,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:56,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:46:56,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:46:56,082 INFO L87 Difference]: Start difference. First operand 331 states and 516 transitions. Second operand 3 states. [2019-11-23 22:46:56,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:56,207 INFO L93 Difference]: Finished difference Result 503 states and 782 transitions. [2019-11-23 22:46:56,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:46:56,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2019-11-23 22:46:56,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:56,212 INFO L225 Difference]: With dead ends: 503 [2019-11-23 22:46:56,212 INFO L226 Difference]: Without dead ends: 327 [2019-11-23 22:46:56,213 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:46:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-11-23 22:46:56,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2019-11-23 22:46:56,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2019-11-23 22:46:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 509 transitions. [2019-11-23 22:46:56,225 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 509 transitions. Word has length 38 [2019-11-23 22:46:56,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:56,225 INFO L462 AbstractCegarLoop]: Abstraction has 327 states and 509 transitions. [2019-11-23 22:46:56,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:46:56,226 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 509 transitions. [2019-11-23 22:46:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:46:56,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:56,228 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:56,229 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:56,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:56,229 INFO L82 PathProgramCache]: Analyzing trace with hash -611603113, now seen corresponding path program 1 times [2019-11-23 22:46:56,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:56,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016867898] [2019-11-23 22:46:56,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:46:57,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016867898] [2019-11-23 22:46:57,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552334570] [2019-11-23 22:46:57,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:46:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:57,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:46:57,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:46:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:46:57,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:46:57,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 22:46:57,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457080430] [2019-11-23 22:46:57,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:46:57,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:57,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:46:57,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:46:57,447 INFO L87 Difference]: Start difference. First operand 327 states and 509 transitions. Second operand 6 states. [2019-11-23 22:46:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:57,566 INFO L93 Difference]: Finished difference Result 669 states and 1039 transitions. [2019-11-23 22:46:57,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:46:57,566 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-11-23 22:46:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:57,568 INFO L225 Difference]: With dead ends: 669 [2019-11-23 22:46:57,569 INFO L226 Difference]: Without dead ends: 345 [2019-11-23 22:46:57,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:46:57,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2019-11-23 22:46:57,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 336. [2019-11-23 22:46:57,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2019-11-23 22:46:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 519 transitions. [2019-11-23 22:46:57,583 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 519 transitions. Word has length 38 [2019-11-23 22:46:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:57,583 INFO L462 AbstractCegarLoop]: Abstraction has 336 states and 519 transitions. [2019-11-23 22:46:57,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:46:57,584 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 519 transitions. [2019-11-23 22:46:57,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 22:46:57,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:57,585 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:57,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:46:57,799 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:57,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:57,800 INFO L82 PathProgramCache]: Analyzing trace with hash -988874171, now seen corresponding path program 2 times [2019-11-23 22:46:57,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:57,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936328108] [2019-11-23 22:46:57,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:46:58,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936328108] [2019-11-23 22:46:58,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932461686] [2019-11-23 22:46:58,625 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:46:58,809 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 22:46:58,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:46:58,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:46:58,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:46:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 22:46:58,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:46:58,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2019-11-23 22:46:58,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470793796] [2019-11-23 22:46:58,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:46:58,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:58,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:46:58,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:46:58,920 INFO L87 Difference]: Start difference. First operand 336 states and 519 transitions. Second operand 7 states. [2019-11-23 22:47:00,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:00,406 INFO L93 Difference]: Finished difference Result 1347 states and 2044 transitions. [2019-11-23 22:47:00,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:47:00,407 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-11-23 22:47:00,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:00,415 INFO L225 Difference]: With dead ends: 1347 [2019-11-23 22:47:00,415 INFO L226 Difference]: Without dead ends: 1103 [2019-11-23 22:47:00,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:47:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2019-11-23 22:47:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 970. [2019-11-23 22:47:00,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2019-11-23 22:47:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1424 transitions. [2019-11-23 22:47:00,455 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1424 transitions. Word has length 47 [2019-11-23 22:47:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:00,456 INFO L462 AbstractCegarLoop]: Abstraction has 970 states and 1424 transitions. [2019-11-23 22:47:00,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:47:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1424 transitions. [2019-11-23 22:47:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 22:47:00,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:00,458 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:00,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:47:00,664 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:00,665 INFO L82 PathProgramCache]: Analyzing trace with hash -287809593, now seen corresponding path program 1 times [2019-11-23 22:47:00,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:00,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303753025] [2019-11-23 22:47:00,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 22:47:01,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303753025] [2019-11-23 22:47:01,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:01,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:47:01,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878167079] [2019-11-23 22:47:01,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:47:01,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:01,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:47:01,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:47:01,190 INFO L87 Difference]: Start difference. First operand 970 states and 1424 transitions. Second operand 4 states. [2019-11-23 22:47:01,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:01,437 INFO L93 Difference]: Finished difference Result 1358 states and 1987 transitions. [2019-11-23 22:47:01,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:47:01,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-11-23 22:47:01,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:01,442 INFO L225 Difference]: With dead ends: 1358 [2019-11-23 22:47:01,443 INFO L226 Difference]: Without dead ends: 843 [2019-11-23 22:47:01,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:47:01,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2019-11-23 22:47:01,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2019-11-23 22:47:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2019-11-23 22:47:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1223 transitions. [2019-11-23 22:47:01,475 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1223 transitions. Word has length 47 [2019-11-23 22:47:01,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:01,475 INFO L462 AbstractCegarLoop]: Abstraction has 843 states and 1223 transitions. [2019-11-23 22:47:01,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:47:01,476 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1223 transitions. [2019-11-23 22:47:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 22:47:01,477 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:01,477 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:01,478 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:01,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2013012997, now seen corresponding path program 1 times [2019-11-23 22:47:01,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:01,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303373802] [2019-11-23 22:47:01,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:02,987 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2019-11-23 22:47:03,154 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2019-11-23 22:47:03,334 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2019-11-23 22:47:03,483 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2019-11-23 22:47:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 22:47:03,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303373802] [2019-11-23 22:47:03,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:03,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-23 22:47:03,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463394932] [2019-11-23 22:47:03,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:47:03,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:03,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:47:03,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:47:03,679 INFO L87 Difference]: Start difference. First operand 843 states and 1223 transitions. Second operand 13 states. [2019-11-23 22:47:06,495 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2019-11-23 22:47:08,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:08,651 INFO L93 Difference]: Finished difference Result 1241 states and 1804 transitions. [2019-11-23 22:47:08,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:47:08,652 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2019-11-23 22:47:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:08,657 INFO L225 Difference]: With dead ends: 1241 [2019-11-23 22:47:08,658 INFO L226 Difference]: Without dead ends: 1057 [2019-11-23 22:47:08,659 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:47:08,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-11-23 22:47:08,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 855. [2019-11-23 22:47:08,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2019-11-23 22:47:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1237 transitions. [2019-11-23 22:47:08,691 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1237 transitions. Word has length 47 [2019-11-23 22:47:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:08,691 INFO L462 AbstractCegarLoop]: Abstraction has 855 states and 1237 transitions. [2019-11-23 22:47:08,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:47:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1237 transitions. [2019-11-23 22:47:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 22:47:08,693 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:08,694 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:08,694 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:08,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:08,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2075052611, now seen corresponding path program 1 times [2019-11-23 22:47:08,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:08,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300316625] [2019-11-23 22:47:08,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:47:09,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300316625] [2019-11-23 22:47:09,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771492609] [2019-11-23 22:47:09,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:47:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:09,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:47:09,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:47:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:47:09,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:47:09,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:47:09,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630419314] [2019-11-23 22:47:09,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:47:09,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:09,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:47:09,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:47:09,508 INFO L87 Difference]: Start difference. First operand 855 states and 1237 transitions. Second operand 6 states. [2019-11-23 22:47:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:09,562 INFO L93 Difference]: Finished difference Result 1706 states and 2471 transitions. [2019-11-23 22:47:09,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:47:09,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2019-11-23 22:47:09,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:09,567 INFO L225 Difference]: With dead ends: 1706 [2019-11-23 22:47:09,567 INFO L226 Difference]: Without dead ends: 859 [2019-11-23 22:47:09,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:47:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2019-11-23 22:47:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2019-11-23 22:47:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859 states. [2019-11-23 22:47:09,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1241 transitions. [2019-11-23 22:47:09,600 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1241 transitions. Word has length 47 [2019-11-23 22:47:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:09,600 INFO L462 AbstractCegarLoop]: Abstraction has 859 states and 1241 transitions. [2019-11-23 22:47:09,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:47:09,601 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1241 transitions. [2019-11-23 22:47:09,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 22:47:09,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:09,602 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:09,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:47:09,807 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:09,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1580323843, now seen corresponding path program 2 times [2019-11-23 22:47:09,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:09,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460625620] [2019-11-23 22:47:09,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:10,637 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2019-11-23 22:47:10,840 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2019-11-23 22:47:11,033 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2019-11-23 22:47:11,219 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-11-23 22:47:11,427 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2019-11-23 22:47:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 22:47:11,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460625620] [2019-11-23 22:47:11,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:11,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-23 22:47:11,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098376712] [2019-11-23 22:47:11,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:47:11,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:11,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:47:11,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:47:11,565 INFO L87 Difference]: Start difference. First operand 859 states and 1241 transitions. Second operand 13 states. [2019-11-23 22:47:14,029 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2019-11-23 22:47:14,205 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2019-11-23 22:47:14,529 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2019-11-23 22:47:14,885 WARN L192 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2019-11-23 22:47:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:16,826 INFO L93 Difference]: Finished difference Result 1634 states and 2351 transitions. [2019-11-23 22:47:16,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:47:16,827 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-23 22:47:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:16,834 INFO L225 Difference]: With dead ends: 1634 [2019-11-23 22:47:16,834 INFO L226 Difference]: Without dead ends: 1246 [2019-11-23 22:47:16,835 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:47:16,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2019-11-23 22:47:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 859. [2019-11-23 22:47:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859 states. [2019-11-23 22:47:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1240 transitions. [2019-11-23 22:47:16,871 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1240 transitions. Word has length 51 [2019-11-23 22:47:16,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:16,871 INFO L462 AbstractCegarLoop]: Abstraction has 859 states and 1240 transitions. [2019-11-23 22:47:16,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:47:16,872 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1240 transitions. [2019-11-23 22:47:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 22:47:16,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:16,873 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:16,874 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:16,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:16,874 INFO L82 PathProgramCache]: Analyzing trace with hash -259100110, now seen corresponding path program 1 times [2019-11-23 22:47:16,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:16,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716674034] [2019-11-23 22:47:16,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 22:47:16,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716674034] [2019-11-23 22:47:16,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:16,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:47:16,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407935050] [2019-11-23 22:47:16,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:47:16,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:16,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:47:16,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:47:16,967 INFO L87 Difference]: Start difference. First operand 859 states and 1240 transitions. Second operand 3 states. [2019-11-23 22:47:17,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:17,052 INFO L93 Difference]: Finished difference Result 1629 states and 2395 transitions. [2019-11-23 22:47:17,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:47:17,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2019-11-23 22:47:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:17,058 INFO L225 Difference]: With dead ends: 1629 [2019-11-23 22:47:17,058 INFO L226 Difference]: Without dead ends: 900 [2019-11-23 22:47:17,060 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:47:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2019-11-23 22:47:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 887. [2019-11-23 22:47:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2019-11-23 22:47:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1266 transitions. [2019-11-23 22:47:17,097 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1266 transitions. Word has length 54 [2019-11-23 22:47:17,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:17,098 INFO L462 AbstractCegarLoop]: Abstraction has 887 states and 1266 transitions. [2019-11-23 22:47:17,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:47:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1266 transitions. [2019-11-23 22:47:17,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 22:47:17,099 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:17,099 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:17,100 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:17,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1538963788, now seen corresponding path program 1 times [2019-11-23 22:47:17,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:17,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859734400] [2019-11-23 22:47:17,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 22:47:17,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859734400] [2019-11-23 22:47:17,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648114797] [2019-11-23 22:47:17,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:47:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:18,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:47:18,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:47:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 22:47:18,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:47:18,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:47:18,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195740167] [2019-11-23 22:47:18,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:47:18,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:18,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:47:18,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:47:18,049 INFO L87 Difference]: Start difference. First operand 887 states and 1266 transitions. Second operand 6 states. [2019-11-23 22:47:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:18,197 INFO L93 Difference]: Finished difference Result 1762 states and 2519 transitions. [2019-11-23 22:47:18,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:47:18,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2019-11-23 22:47:18,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:18,204 INFO L225 Difference]: With dead ends: 1762 [2019-11-23 22:47:18,204 INFO L226 Difference]: Without dead ends: 896 [2019-11-23 22:47:18,206 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:47:18,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-11-23 22:47:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2019-11-23 22:47:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2019-11-23 22:47:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1276 transitions. [2019-11-23 22:47:18,260 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1276 transitions. Word has length 54 [2019-11-23 22:47:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:18,260 INFO L462 AbstractCegarLoop]: Abstraction has 896 states and 1276 transitions. [2019-11-23 22:47:18,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:47:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1276 transitions. [2019-11-23 22:47:18,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:47:18,263 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:18,263 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:18,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:47:18,474 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:18,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:18,475 INFO L82 PathProgramCache]: Analyzing trace with hash 306667878, now seen corresponding path program 2 times [2019-11-23 22:47:18,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:18,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325281526] [2019-11-23 22:47:18,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:21,197 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2019-11-23 22:47:21,524 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2019-11-23 22:47:21,668 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2019-11-23 22:47:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:47:21,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325281526] [2019-11-23 22:47:21,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:21,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 22:47:21,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104457948] [2019-11-23 22:47:21,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:47:21,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:21,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:47:21,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:47:21,707 INFO L87 Difference]: Start difference. First operand 896 states and 1276 transitions. Second operand 6 states. [2019-11-23 22:47:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:24,426 INFO L93 Difference]: Finished difference Result 1223 states and 1747 transitions. [2019-11-23 22:47:24,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:47:24,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2019-11-23 22:47:24,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:24,432 INFO L225 Difference]: With dead ends: 1223 [2019-11-23 22:47:24,432 INFO L226 Difference]: Without dead ends: 860 [2019-11-23 22:47:24,433 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 14 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:47:24,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2019-11-23 22:47:24,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2019-11-23 22:47:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2019-11-23 22:47:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1231 transitions. [2019-11-23 22:47:24,464 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1231 transitions. Word has length 63 [2019-11-23 22:47:24,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:24,464 INFO L462 AbstractCegarLoop]: Abstraction has 860 states and 1231 transitions. [2019-11-23 22:47:24,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:47:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1231 transitions. [2019-11-23 22:47:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:47:24,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:24,465 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:24,466 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:24,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1095849690, now seen corresponding path program 1 times [2019-11-23 22:47:24,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:24,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726892494] [2019-11-23 22:47:24,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:47:27,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726892494] [2019-11-23 22:47:27,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:27,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:47:27,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774130264] [2019-11-23 22:47:27,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:47:27,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:27,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:47:27,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:47:27,560 INFO L87 Difference]: Start difference. First operand 860 states and 1231 transitions. Second operand 5 states. [2019-11-23 22:47:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:28,026 INFO L93 Difference]: Finished difference Result 1239 states and 1735 transitions. [2019-11-23 22:47:28,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:47:28,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-11-23 22:47:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:28,031 INFO L225 Difference]: With dead ends: 1239 [2019-11-23 22:47:28,031 INFO L226 Difference]: Without dead ends: 800 [2019-11-23 22:47:28,032 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:47:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2019-11-23 22:47:28,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 711. [2019-11-23 22:47:28,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 711 states. [2019-11-23 22:47:28,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 948 transitions. [2019-11-23 22:47:28,061 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 948 transitions. Word has length 63 [2019-11-23 22:47:28,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:28,061 INFO L462 AbstractCegarLoop]: Abstraction has 711 states and 948 transitions. [2019-11-23 22:47:28,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:47:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 948 transitions. [2019-11-23 22:47:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:47:28,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:28,066 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:28,066 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:28,067 INFO L82 PathProgramCache]: Analyzing trace with hash 90491624, now seen corresponding path program 1 times [2019-11-23 22:47:28,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:28,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415131529] [2019-11-23 22:47:28,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:31,219 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2019-11-23 22:47:31,353 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2019-11-23 22:47:31,541 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2019-11-23 22:47:31,740 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2019-11-23 22:47:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:47:32,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415131529] [2019-11-23 22:47:32,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:32,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-23 22:47:32,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749550261] [2019-11-23 22:47:32,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:47:32,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:32,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:47:32,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:47:32,103 INFO L87 Difference]: Start difference. First operand 711 states and 948 transitions. Second operand 10 states. [2019-11-23 22:47:34,620 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2019-11-23 22:47:34,900 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2019-11-23 22:47:35,183 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2019-11-23 22:47:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:36,476 INFO L93 Difference]: Finished difference Result 748 states and 988 transitions. [2019-11-23 22:47:36,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:47:36,476 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2019-11-23 22:47:36,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:36,479 INFO L225 Difference]: With dead ends: 748 [2019-11-23 22:47:36,479 INFO L226 Difference]: Without dead ends: 744 [2019-11-23 22:47:36,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:47:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2019-11-23 22:47:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 716. [2019-11-23 22:47:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2019-11-23 22:47:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 953 transitions. [2019-11-23 22:47:36,516 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 953 transitions. Word has length 63 [2019-11-23 22:47:36,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:36,516 INFO L462 AbstractCegarLoop]: Abstraction has 716 states and 953 transitions. [2019-11-23 22:47:36,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:47:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 953 transitions. [2019-11-23 22:47:36,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 22:47:36,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:36,518 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:36,518 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:36,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:36,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1313393332, now seen corresponding path program 1 times [2019-11-23 22:47:36,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:36,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115178933] [2019-11-23 22:47:36,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:41,347 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2019-11-23 22:47:41,724 WARN L192 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 88 [2019-11-23 22:47:42,188 WARN L192 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 90 [2019-11-23 22:47:42,685 WARN L192 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 98 [2019-11-23 22:47:43,313 WARN L192 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 101 [2019-11-23 22:47:44,031 WARN L192 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 101 [2019-11-23 22:47:44,460 WARN L192 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 77 [2019-11-23 22:47:44,762 WARN L192 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 62 [2019-11-23 22:47:45,187 WARN L192 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2019-11-23 22:47:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:47:45,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115178933] [2019-11-23 22:47:45,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:45,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-23 22:47:45,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34643668] [2019-11-23 22:47:45,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:47:45,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:45,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:47:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:47:45,281 INFO L87 Difference]: Start difference. First operand 716 states and 953 transitions. Second operand 11 states. [2019-11-23 22:47:45,513 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2019-11-23 22:47:59,899 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2019-11-23 22:48:00,344 WARN L192 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2019-11-23 22:48:00,784 WARN L192 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2019-11-23 22:48:00,997 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-11-23 22:48:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:48:02,284 INFO L93 Difference]: Finished difference Result 891 states and 1173 transitions. [2019-11-23 22:48:02,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:48:02,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2019-11-23 22:48:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:48:02,289 INFO L225 Difference]: With dead ends: 891 [2019-11-23 22:48:02,289 INFO L226 Difference]: Without dead ends: 738 [2019-11-23 22:48:02,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:48:02,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2019-11-23 22:48:02,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 716. [2019-11-23 22:48:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2019-11-23 22:48:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 949 transitions. [2019-11-23 22:48:02,324 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 949 transitions. Word has length 69 [2019-11-23 22:48:02,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:48:02,324 INFO L462 AbstractCegarLoop]: Abstraction has 716 states and 949 transitions. [2019-11-23 22:48:02,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:48:02,324 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 949 transitions. [2019-11-23 22:48:02,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 22:48:02,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:48:02,326 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:48:02,326 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:48:02,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:48:02,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1168578161, now seen corresponding path program 1 times [2019-11-23 22:48:02,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:48:02,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978806193] [2019-11-23 22:48:02,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:48:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:48:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:48:03,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978806193] [2019-11-23 22:48:03,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:48:03,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-23 22:48:03,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507187988] [2019-11-23 22:48:03,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:48:03,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:48:03,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:48:03,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:48:03,815 INFO L87 Difference]: Start difference. First operand 716 states and 949 transitions. Second operand 10 states.