/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:12:49,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:12:49,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:12:49,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:12:49,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:12:49,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:12:49,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:12:49,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:12:49,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:12:49,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:12:49,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:12:49,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:12:49,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:12:49,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:12:49,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:12:49,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:12:49,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:12:49,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:12:49,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:12:49,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:12:49,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:12:49,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:12:49,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:12:49,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:12:49,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:12:49,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:12:49,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:12:49,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:12:49,467 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 [2020-07-19 21:12:49,482 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:12:49,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:12:49,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:12:49,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:12:49,484 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:12:49,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:12:49,484 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:12:49,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:12:49,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:12:49,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:12:49,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:12:49,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:12:49,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:12:49,485 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:12:49,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:12:49,486 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:12:49,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:12:49,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:12:49,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:12:49,486 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:12:49,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:12:49,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:12:49,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:12:49,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:12:49,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:12:49,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:12:49,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:12:49,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:12:49,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:12:49,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:12:49,772 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:12:49,784 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:12:49,787 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:12:49,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:12:49,789 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:12:49,790 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-19 21:12:49,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/261a6de06/392de4c8a45a49da9c745de6d05ccfcc/FLAGb47d5bd20 [2020-07-19 21:12:50,277 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:12:50,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-19 21:12:50,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/261a6de06/392de4c8a45a49da9c745de6d05ccfcc/FLAGb47d5bd20 [2020-07-19 21:12:50,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/261a6de06/392de4c8a45a49da9c745de6d05ccfcc [2020-07-19 21:12:50,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:12:50,664 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:12:50,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:12:50,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:12:50,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:12:50,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:12:50" (1/1) ... [2020-07-19 21:12:50,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e5546d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:50, skipping insertion in model container [2020-07-19 21:12:50,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:12:50" (1/1) ... [2020-07-19 21:12:50,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:12:50,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:12:50,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:12:50,867 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:12:50,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:12:50,898 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:12:50,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:50 WrapperNode [2020-07-19 21:12:50,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:12:50,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:12:50,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:12:50,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:12:50,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:50" (1/1) ... [2020-07-19 21:12:50,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:50" (1/1) ... [2020-07-19 21:12:50,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:50" (1/1) ... [2020-07-19 21:12:50,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:50" (1/1) ... [2020-07-19 21:12:51,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:50" (1/1) ... [2020-07-19 21:12:51,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:50" (1/1) ... [2020-07-19 21:12:51,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:50" (1/1) ... [2020-07-19 21:12:51,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:12:51,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:12:51,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:12:51,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:12:51,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:50" (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 [2020-07-19 21:12:51,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:12:51,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:12:51,085 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-07-19 21:12:51,086 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-07-19 21:12:51,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:12:51,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:12:51,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:12:51,087 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-07-19 21:12:51,087 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-07-19 21:12:51,088 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:12:51,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:12:51,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:12:51,288 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:12:51,288 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 21:12:51,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:12:51 BoogieIcfgContainer [2020-07-19 21:12:51,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:12:51,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:12:51,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:12:51,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:12:51,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:12:50" (1/3) ... [2020-07-19 21:12:51,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b85ff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:12:51, skipping insertion in model container [2020-07-19 21:12:51,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:50" (2/3) ... [2020-07-19 21:12:51,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b85ff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:12:51, skipping insertion in model container [2020-07-19 21:12:51,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:12:51" (3/3) ... [2020-07-19 21:12:51,300 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-07-19 21:12:51,312 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:12:51,320 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:12:51,339 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:12:51,394 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:12:51,394 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:12:51,394 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:12:51,394 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:12:51,394 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:12:51,394 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:12:51,395 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:12:51,395 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:12:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-19 21:12:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 21:12:51,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:51,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:51,438 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:51,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2122072279, now seen corresponding path program 1 times [2020-07-19 21:12:51,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:51,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458834006] [2020-07-19 21:12:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:12:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:12:51,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458834006] [2020-07-19 21:12:51,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:12:51,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-19 21:12:51,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977583541] [2020-07-19 21:12:51,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:12:51,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:51,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:12:51,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:12:51,766 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2020-07-19 21:12:51,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:51,924 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-07-19 21:12:51,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:12:51,927 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-19 21:12:51,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:51,937 INFO L225 Difference]: With dead ends: 41 [2020-07-19 21:12:51,938 INFO L226 Difference]: Without dead ends: 27 [2020-07-19 21:12:51,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:12:51,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-19 21:12:51,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-19 21:12:51,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 21:12:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-19 21:12:51,980 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-07-19 21:12:51,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:51,981 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-19 21:12:51,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:12:51,981 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-19 21:12:51,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-19 21:12:51,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:51,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:51,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:12:51,984 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:51,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:51,985 INFO L82 PathProgramCache]: Analyzing trace with hash -612070348, now seen corresponding path program 1 times [2020-07-19 21:12:51,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:51,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423292258] [2020-07-19 21:12:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:12:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:12:52,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423292258] [2020-07-19 21:12:52,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:12:52,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-19 21:12:52,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092620505] [2020-07-19 21:12:52,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:12:52,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:12:52,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:12:52,181 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-07-19 21:12:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:52,278 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-19 21:12:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:12:52,279 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-19 21:12:52,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:52,281 INFO L225 Difference]: With dead ends: 33 [2020-07-19 21:12:52,281 INFO L226 Difference]: Without dead ends: 29 [2020-07-19 21:12:52,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:12:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-19 21:12:52,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-07-19 21:12:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 21:12:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-19 21:12:52,291 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2020-07-19 21:12:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:52,291 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-19 21:12:52,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:12:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-19 21:12:52,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-19 21:12:52,293 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:52,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:52,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:12:52,294 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:52,294 INFO L82 PathProgramCache]: Analyzing trace with hash -592576498, now seen corresponding path program 1 times [2020-07-19 21:12:52,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:52,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992854573] [2020-07-19 21:12:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:12:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:12:52,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992854573] [2020-07-19 21:12:52,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:12:52,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:12:52,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025635929] [2020-07-19 21:12:52,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:12:52,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:52,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:12:52,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:12:52,399 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-07-19 21:12:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:52,444 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-07-19 21:12:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:12:52,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-19 21:12:52,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:52,446 INFO L225 Difference]: With dead ends: 41 [2020-07-19 21:12:52,447 INFO L226 Difference]: Without dead ends: 29 [2020-07-19 21:12:52,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:12:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-19 21:12:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-07-19 21:12:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 21:12:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-19 21:12:52,463 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-07-19 21:12:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:52,464 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-19 21:12:52,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:12:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-19 21:12:52,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:12:52,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:52,465 INFO L422 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] [2020-07-19 21:12:52,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 21:12:52,466 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:52,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:52,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1306118367, now seen corresponding path program 1 times [2020-07-19 21:12:52,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:52,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272215155] [2020-07-19 21:12:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:12:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:12:52,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272215155] [2020-07-19 21:12:52,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:12:52,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-19 21:12:52,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757039726] [2020-07-19 21:12:52,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:12:52,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:52,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:12:52,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:12:52,653 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 10 states. [2020-07-19 21:12:52,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:52,820 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-07-19 21:12:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:12:52,821 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-07-19 21:12:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:52,822 INFO L225 Difference]: With dead ends: 36 [2020-07-19 21:12:52,822 INFO L226 Difference]: Without dead ends: 32 [2020-07-19 21:12:52,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:12:52,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-19 21:12:52,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-19 21:12:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 21:12:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-19 21:12:52,836 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-07-19 21:12:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:52,837 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-19 21:12:52,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:12:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-19 21:12:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 21:12:52,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:52,840 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-19 21:12:52,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-19 21:12:52,841 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:52,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1571291849, now seen corresponding path program 1 times [2020-07-19 21:12:52,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:52,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836608046] [2020-07-19 21:12:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:12:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:12:52,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836608046] [2020-07-19 21:12:52,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:12:52,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:12:52,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414491930] [2020-07-19 21:12:52,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:12:52,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:52,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:12:52,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:12:52,927 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-07-19 21:12:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:52,965 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-07-19 21:12:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:12:52,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-19 21:12:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:52,967 INFO L225 Difference]: With dead ends: 42 [2020-07-19 21:12:52,967 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 21:12:52,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:12:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 21:12:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 21:12:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 21:12:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-07-19 21:12:52,974 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-07-19 21:12:52,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:52,974 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-07-19 21:12:52,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:12:52,975 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-07-19 21:12:52,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-19 21:12:52,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:52,976 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-19 21:12:52,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-19 21:12:52,976 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1610221656, now seen corresponding path program 1 times [2020-07-19 21:12:52,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:52,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466864980] [2020-07-19 21:12:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:12:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-19 21:12:53,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466864980] [2020-07-19 21:12:53,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714259745] [2020-07-19 21:12:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 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 [2020-07-19 21:12:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:53,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 21:12:53,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:53,409 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:12:53,414 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:12:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-19 21:12:53,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:53,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2020-07-19 21:12:53,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790441921] [2020-07-19 21:12:53,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:12:53,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:53,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:12:53,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:12:53,546 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2020-07-19 21:12:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:53,785 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-07-19 21:12:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:12:53,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-07-19 21:12:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:53,787 INFO L225 Difference]: With dead ends: 42 [2020-07-19 21:12:53,787 INFO L226 Difference]: Without dead ends: 38 [2020-07-19 21:12:53,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:12:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-19 21:12:53,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-07-19 21:12:53,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 21:12:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-07-19 21:12:53,794 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2020-07-19 21:12:53,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:53,795 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-07-19 21:12:53,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:12:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-07-19 21:12:53,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-19 21:12:53,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:53,796 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:54,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 21:12:54,011 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:54,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:54,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1417612799, now seen corresponding path program 1 times [2020-07-19 21:12:54,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:54,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619271874] [2020-07-19 21:12:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:12:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 21:12:54,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619271874] [2020-07-19 21:12:54,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117246511] [2020-07-19 21:12:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 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) [2020-07-19 21:12:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:54,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 21:12:54,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:54,569 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:12:54,570 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:12:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 21:12:54,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:54,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2020-07-19 21:12:54,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886692663] [2020-07-19 21:12:54,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 21:12:54,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:54,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 21:12:54,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:12:54,665 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 22 states. [2020-07-19 21:12:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:55,056 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-07-19 21:12:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:12:55,057 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2020-07-19 21:12:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:55,058 INFO L225 Difference]: With dead ends: 48 [2020-07-19 21:12:55,058 INFO L226 Difference]: Without dead ends: 44 [2020-07-19 21:12:55,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:12:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-19 21:12:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-07-19 21:12:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 21:12:55,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-07-19 21:12:55,066 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 36 [2020-07-19 21:12:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:55,066 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-07-19 21:12:55,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 21:12:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-07-19 21:12:55,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-19 21:12:55,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:55,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:55,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:55,282 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:55,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:55,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1668529660, now seen corresponding path program 2 times [2020-07-19 21:12:55,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:55,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992138531] [2020-07-19 21:12:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:12:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-19 21:12:55,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992138531] [2020-07-19 21:12:55,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792163368] [2020-07-19 21:12:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 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 [2020-07-19 21:12:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:55,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-19 21:12:55,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:55,770 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:12:55,771 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:12:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-19 21:12:55,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:55,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2020-07-19 21:12:55,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314957068] [2020-07-19 21:12:55,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 21:12:55,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:55,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 21:12:55,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:12:55,855 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 19 states. [2020-07-19 21:12:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:56,277 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-07-19 21:12:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:12:56,278 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-07-19 21:12:56,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:56,279 INFO L225 Difference]: With dead ends: 54 [2020-07-19 21:12:56,279 INFO L226 Difference]: Without dead ends: 50 [2020-07-19 21:12:56,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2020-07-19 21:12:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-19 21:12:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-07-19 21:12:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 21:12:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-07-19 21:12:56,286 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2020-07-19 21:12:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:56,286 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-07-19 21:12:56,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 21:12:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-07-19 21:12:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-19 21:12:56,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:56,288 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:56,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:56,504 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:56,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:56,505 INFO L82 PathProgramCache]: Analyzing trace with hash -150927713, now seen corresponding path program 2 times [2020-07-19 21:12:56,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:56,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630713505] [2020-07-19 21:12:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:12:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-19 21:12:56,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630713505] [2020-07-19 21:12:56,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351258362] [2020-07-19 21:12:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 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 [2020-07-19 21:12:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-19 21:12:56,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:57,339 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:12:57,339 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:12:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-19 21:12:57,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:57,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2020-07-19 21:12:57,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109467498] [2020-07-19 21:12:57,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-19 21:12:57,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:57,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-19 21:12:57,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:12:57,455 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 30 states. [2020-07-19 21:12:58,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:58,084 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-07-19 21:12:58,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 21:12:58,084 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 50 [2020-07-19 21:12:58,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:58,086 INFO L225 Difference]: With dead ends: 60 [2020-07-19 21:12:58,086 INFO L226 Difference]: Without dead ends: 56 [2020-07-19 21:12:58,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 21:12:58,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-19 21:12:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-07-19 21:12:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-19 21:12:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-07-19 21:12:58,094 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 50 [2020-07-19 21:12:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:58,094 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-07-19 21:12:58,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-19 21:12:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-07-19 21:12:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-19 21:12:58,095 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:58,096 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:58,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:58,310 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:58,311 INFO L82 PathProgramCache]: Analyzing trace with hash -308892384, now seen corresponding path program 3 times [2020-07-19 21:12:58,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:58,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341119495] [2020-07-19 21:12:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:12:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-19 21:12:58,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341119495] [2020-07-19 21:12:58,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665986598] [2020-07-19 21:12:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 64 conjunts are in the unsatisfiable core [2020-07-19 21:12:58,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:58,963 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:12:58,964 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:12:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-19 21:12:59,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:59,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2020-07-19 21:12:59,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778158562] [2020-07-19 21:12:59,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 21:12:59,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:59,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 21:12:59,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:12:59,073 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 23 states. [2020-07-19 21:12:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:59,654 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-07-19 21:12:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 21:12:59,655 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-07-19 21:12:59,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:59,656 INFO L225 Difference]: With dead ends: 66 [2020-07-19 21:12:59,656 INFO L226 Difference]: Without dead ends: 62 [2020-07-19 21:12:59,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 21:12:59,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-19 21:12:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-19 21:12:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 21:12:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-07-19 21:12:59,665 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 57 [2020-07-19 21:12:59,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:59,665 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-07-19 21:12:59,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 21:12:59,665 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-07-19 21:12:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-19 21:12:59,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:59,667 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:59,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 21:12:59,877 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:59,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:59,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1668346559, now seen corresponding path program 3 times [2020-07-19 21:12:59,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:59,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141849236] [2020-07-19 21:12:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:12:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-19 21:13:00,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141849236] [2020-07-19 21:13:00,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377792546] [2020-07-19 21:13:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 56 conjunts are in the unsatisfiable core [2020-07-19 21:13:00,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:01,002 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:13:01,003 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:13:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-19 21:13:01,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:01,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2020-07-19 21:13:01,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095477827] [2020-07-19 21:13:01,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-19 21:13:01,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:01,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-19 21:13:01,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 21:13:01,135 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 38 states. [2020-07-19 21:13:02,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:02,089 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-07-19 21:13:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 21:13:02,089 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 64 [2020-07-19 21:13:02,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:02,090 INFO L225 Difference]: With dead ends: 72 [2020-07-19 21:13:02,090 INFO L226 Difference]: Without dead ends: 68 [2020-07-19 21:13:02,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=170, Invalid=2692, Unknown=0, NotChecked=0, Total=2862 [2020-07-19 21:13:02,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-19 21:13:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-07-19 21:13:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 21:13:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-07-19 21:13:02,098 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 64 [2020-07-19 21:13:02,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:02,099 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-07-19 21:13:02,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-19 21:13:02,099 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-07-19 21:13:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-19 21:13:02,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:02,101 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:02,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:02,306 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:02,307 INFO L82 PathProgramCache]: Analyzing trace with hash 353359300, now seen corresponding path program 4 times [2020-07-19 21:13:02,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:02,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183361333] [2020-07-19 21:13:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:13:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-19 21:13:02,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183361333] [2020-07-19 21:13:02,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688109702] [2020-07-19 21:13:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:02,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 80 conjunts are in the unsatisfiable core [2020-07-19 21:13:02,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:03,098 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:13:03,099 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:13:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-19 21:13:03,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:03,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2020-07-19 21:13:03,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652681321] [2020-07-19 21:13:03,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-19 21:13:03,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-19 21:13:03,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:13:03,204 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 27 states. [2020-07-19 21:13:04,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:04,029 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-07-19 21:13:04,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 21:13:04,030 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-07-19 21:13:04,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:04,031 INFO L225 Difference]: With dead ends: 78 [2020-07-19 21:13:04,031 INFO L226 Difference]: Without dead ends: 74 [2020-07-19 21:13:04,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 21:13:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-19 21:13:04,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 51. [2020-07-19 21:13:04,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 21:13:04,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-07-19 21:13:04,039 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 71 [2020-07-19 21:13:04,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:04,040 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-07-19 21:13:04,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-19 21:13:04,040 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-07-19 21:13:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-19 21:13:04,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:04,041 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:04,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:04,255 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:04,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:04,256 INFO L82 PathProgramCache]: Analyzing trace with hash -165146017, now seen corresponding path program 4 times [2020-07-19 21:13:04,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:04,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073925780] [2020-07-19 21:13:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:13:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-07-19 21:13:04,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073925780] [2020-07-19 21:13:04,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728011460] [2020-07-19 21:13:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:05,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 68 conjunts are in the unsatisfiable core [2020-07-19 21:13:05,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:05,790 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:13:05,791 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:13:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-07-19 21:13:05,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:05,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 46 [2020-07-19 21:13:05,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805825045] [2020-07-19 21:13:05,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-19 21:13:05,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:05,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-19 21:13:05,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1960, Unknown=0, NotChecked=0, Total=2070 [2020-07-19 21:13:05,935 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 46 states. [2020-07-19 21:13:07,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:07,365 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-07-19 21:13:07,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 21:13:07,365 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 78 [2020-07-19 21:13:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:07,367 INFO L225 Difference]: With dead ends: 84 [2020-07-19 21:13:07,367 INFO L226 Difference]: Without dead ends: 80 [2020-07-19 21:13:07,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=210, Invalid=4080, Unknown=0, NotChecked=0, Total=4290 [2020-07-19 21:13:07,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-19 21:13:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2020-07-19 21:13:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-19 21:13:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-07-19 21:13:07,375 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 78 [2020-07-19 21:13:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:07,376 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-07-19 21:13:07,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-19 21:13:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-07-19 21:13:07,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-19 21:13:07,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:07,377 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:07,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 21:13:07,589 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:07,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:07,590 INFO L82 PathProgramCache]: Analyzing trace with hash 462698472, now seen corresponding path program 5 times [2020-07-19 21:13:07,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:07,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969745402] [2020-07-19 21:13:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:13:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-07-19 21:13:08,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969745402] [2020-07-19 21:13:08,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539157384] [2020-07-19 21:13:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:08,510 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 96 conjunts are in the unsatisfiable core [2020-07-19 21:13:08,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:08,636 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:13:08,637 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:13:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-07-19 21:13:08,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:08,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2020-07-19 21:13:08,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980290466] [2020-07-19 21:13:08,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-19 21:13:08,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:08,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-19 21:13:08,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2020-07-19 21:13:08,756 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 31 states. [2020-07-19 21:13:09,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:09,856 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-07-19 21:13:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-19 21:13:09,862 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-07-19 21:13:09,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:09,864 INFO L225 Difference]: With dead ends: 90 [2020-07-19 21:13:09,864 INFO L226 Difference]: Without dead ends: 86 [2020-07-19 21:13:09,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=156, Invalid=2600, Unknown=0, NotChecked=0, Total=2756 [2020-07-19 21:13:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-19 21:13:09,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2020-07-19 21:13:09,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 21:13:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-07-19 21:13:09,872 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 85 [2020-07-19 21:13:09,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:09,872 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-07-19 21:13:09,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-19 21:13:09,872 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-07-19 21:13:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-19 21:13:09,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:09,874 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:10,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:10,087 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:10,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:10,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1580751489, now seen corresponding path program 5 times [2020-07-19 21:13:10,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:10,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212990828] [2020-07-19 21:13:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:13:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-19 21:13:10,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212990828] [2020-07-19 21:13:10,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057117632] [2020-07-19 21:13:10,954 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:11,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 80 conjunts are in the unsatisfiable core [2020-07-19 21:13:11,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:12,085 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:13:12,086 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:13:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-19 21:13:12,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:12,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 54 [2020-07-19 21:13:12,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97604923] [2020-07-19 21:13:12,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-19 21:13:12,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:12,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-19 21:13:12,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-07-19 21:13:12,257 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 54 states. [2020-07-19 21:13:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:14,274 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-07-19 21:13:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-19 21:13:14,274 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 92 [2020-07-19 21:13:14,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:14,275 INFO L225 Difference]: With dead ends: 96 [2020-07-19 21:13:14,275 INFO L226 Difference]: Without dead ends: 92 [2020-07-19 21:13:14,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=250, Invalid=5756, Unknown=0, NotChecked=0, Total=6006 [2020-07-19 21:13:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-19 21:13:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-19 21:13:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-19 21:13:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-07-19 21:13:14,284 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 92 [2020-07-19 21:13:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:14,285 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-07-19 21:13:14,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-19 21:13:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-07-19 21:13:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-19 21:13:14,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:14,286 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:14,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 21:13:14,501 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:14,502 INFO L82 PathProgramCache]: Analyzing trace with hash 165729164, now seen corresponding path program 6 times [2020-07-19 21:13:14,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:14,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712102479] [2020-07-19 21:13:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:13:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-07-19 21:13:15,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712102479] [2020-07-19 21:13:15,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013215162] [2020-07-19 21:13:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:15,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 112 conjunts are in the unsatisfiable core [2020-07-19 21:13:15,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:15,766 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:13:15,766 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:13:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-07-19 21:13:15,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:15,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 35 [2020-07-19 21:13:15,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282153333] [2020-07-19 21:13:15,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-19 21:13:15,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:15,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-19 21:13:15,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 21:13:15,911 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 35 states. [2020-07-19 21:13:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:17,380 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-07-19 21:13:17,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-19 21:13:17,384 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 99 [2020-07-19 21:13:17,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:17,385 INFO L225 Difference]: With dead ends: 102 [2020-07-19 21:13:17,386 INFO L226 Difference]: Without dead ends: 98 [2020-07-19 21:13:17,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=180, Invalid=3480, Unknown=0, NotChecked=0, Total=3660 [2020-07-19 21:13:17,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-19 21:13:17,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2020-07-19 21:13:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-19 21:13:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-07-19 21:13:17,407 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 99 [2020-07-19 21:13:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:17,408 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-07-19 21:13:17,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-19 21:13:17,412 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-07-19 21:13:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-19 21:13:17,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:17,415 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:17,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-19 21:13:17,617 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:17,618 INFO L82 PathProgramCache]: Analyzing trace with hash -684135393, now seen corresponding path program 6 times [2020-07-19 21:13:17,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:17,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541378703] [2020-07-19 21:13:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:13:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-07-19 21:13:18,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541378703] [2020-07-19 21:13:18,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264606548] [2020-07-19 21:13:18,783 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:18,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 92 conjunts are in the unsatisfiable core [2020-07-19 21:13:18,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:20,365 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:13:20,366 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:13:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-07-19 21:13:20,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:20,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 62 [2020-07-19 21:13:20,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962390884] [2020-07-19 21:13:20,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-19 21:13:20,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:20,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-19 21:13:20,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-07-19 21:13:20,643 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 62 states. [2020-07-19 21:13:23,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:23,332 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-07-19 21:13:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-19 21:13:23,332 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 106 [2020-07-19 21:13:23,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:23,335 INFO L225 Difference]: With dead ends: 108 [2020-07-19 21:13:23,335 INFO L226 Difference]: Without dead ends: 104 [2020-07-19 21:13:23,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=290, Invalid=7720, Unknown=0, NotChecked=0, Total=8010 [2020-07-19 21:13:23,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-19 21:13:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2020-07-19 21:13:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-19 21:13:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-07-19 21:13:23,348 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 106 [2020-07-19 21:13:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:23,349 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-07-19 21:13:23,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-19 21:13:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-07-19 21:13:23,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-07-19 21:13:23,352 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:23,352 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:23,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-19 21:13:23,560 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:23,561 INFO L82 PathProgramCache]: Analyzing trace with hash -876959568, now seen corresponding path program 7 times [2020-07-19 21:13:23,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:23,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373137149] [2020-07-19 21:13:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:13:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-19 21:13:25,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373137149] [2020-07-19 21:13:25,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312756764] [2020-07-19 21:13:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:25,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 128 conjunts are in the unsatisfiable core [2020-07-19 21:13:25,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:25,628 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:13:25,629 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:13:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-19 21:13:25,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:25,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 39 [2020-07-19 21:13:25,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596536532] [2020-07-19 21:13:25,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-19 21:13:25,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:25,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-19 21:13:25,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 21:13:25,771 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 39 states. [2020-07-19 21:13:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:27,663 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-07-19 21:13:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-19 21:13:27,664 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 113 [2020-07-19 21:13:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:27,665 INFO L225 Difference]: With dead ends: 114 [2020-07-19 21:13:27,665 INFO L226 Difference]: Without dead ends: 110 [2020-07-19 21:13:27,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=204, Invalid=4488, Unknown=0, NotChecked=0, Total=4692 [2020-07-19 21:13:27,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-19 21:13:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 69. [2020-07-19 21:13:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-19 21:13:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-07-19 21:13:27,673 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 113 [2020-07-19 21:13:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:27,674 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-07-19 21:13:27,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-19 21:13:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-07-19 21:13:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-19 21:13:27,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:27,675 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:27,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 21:13:27,885 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:27,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:27,886 INFO L82 PathProgramCache]: Analyzing trace with hash -307419585, now seen corresponding path program 7 times [2020-07-19 21:13:27,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:27,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257661592] [2020-07-19 21:13:27,887 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:13:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-19 21:13:29,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257661592] [2020-07-19 21:13:29,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928352469] [2020-07-19 21:13:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:29,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 104 conjunts are in the unsatisfiable core [2020-07-19 21:13:29,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:31,427 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:13:31,428 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:13:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-19 21:13:31,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:31,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 70 [2020-07-19 21:13:31,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835818475] [2020-07-19 21:13:31,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-19 21:13:31,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:31,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-19 21:13:31,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-07-19 21:13:31,634 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 70 states. [2020-07-19 21:13:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:34,833 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-07-19 21:13:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-19 21:13:34,834 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 120 [2020-07-19 21:13:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:34,835 INFO L225 Difference]: With dead ends: 120 [2020-07-19 21:13:34,835 INFO L226 Difference]: Without dead ends: 116 [2020-07-19 21:13:34,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=330, Invalid=9972, Unknown=0, NotChecked=0, Total=10302 [2020-07-19 21:13:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-19 21:13:34,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-07-19 21:13:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-19 21:13:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-07-19 21:13:34,844 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 120 [2020-07-19 21:13:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:34,845 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-07-19 21:13:34,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-19 21:13:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-07-19 21:13:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-19 21:13:34,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:34,846 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:35,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:35,062 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:35,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:35,063 INFO L82 PathProgramCache]: Analyzing trace with hash -873547948, now seen corresponding path program 8 times [2020-07-19 21:13:35,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:35,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701792832] [2020-07-19 21:13:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:13:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-07-19 21:13:36,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701792832] [2020-07-19 21:13:36,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094772063] [2020-07-19 21:13:36,819 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:36,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 144 conjunts are in the unsatisfiable core [2020-07-19 21:13:36,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:37,053 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:13:37,054 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:13:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-07-19 21:13:37,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:37,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 43 [2020-07-19 21:13:37,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476655157] [2020-07-19 21:13:37,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-19 21:13:37,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:37,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-19 21:13:37,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1716, Unknown=0, NotChecked=0, Total=1806 [2020-07-19 21:13:37,258 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 43 states. [2020-07-19 21:13:39,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:39,589 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-07-19 21:13:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-19 21:13:39,590 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-07-19 21:13:39,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:39,591 INFO L225 Difference]: With dead ends: 126 [2020-07-19 21:13:39,591 INFO L226 Difference]: Without dead ends: 122 [2020-07-19 21:13:39,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=228, Invalid=5624, Unknown=0, NotChecked=0, Total=5852 [2020-07-19 21:13:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-19 21:13:39,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-07-19 21:13:39,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-19 21:13:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-07-19 21:13:39,598 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 127 [2020-07-19 21:13:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:39,599 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-07-19 21:13:39,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-19 21:13:39,599 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-07-19 21:13:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-19 21:13:39,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:39,600 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:39,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:39,812 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:39,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:39,813 INFO L82 PathProgramCache]: Analyzing trace with hash 178099167, now seen corresponding path program 8 times [2020-07-19 21:13:39,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:39,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621571102] [2020-07-19 21:13:39,814 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:13:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-07-19 21:13:41,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621571102] [2020-07-19 21:13:41,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141252891] [2020-07-19 21:13:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:41,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 116 conjunts are in the unsatisfiable core [2020-07-19 21:13:41,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:44,445 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:13:44,446 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:13:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-07-19 21:13:44,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:44,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 78 [2020-07-19 21:13:44,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188001719] [2020-07-19 21:13:44,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-07-19 21:13:44,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:44,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-07-19 21:13:44,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5816, Unknown=0, NotChecked=0, Total=6006 [2020-07-19 21:13:44,683 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 78 states. [2020-07-19 21:13:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:48,838 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-07-19 21:13:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-19 21:13:48,838 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 134 [2020-07-19 21:13:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:48,840 INFO L225 Difference]: With dead ends: 132 [2020-07-19 21:13:48,840 INFO L226 Difference]: Without dead ends: 128 [2020-07-19 21:13:48,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=370, Invalid=12512, Unknown=0, NotChecked=0, Total=12882 [2020-07-19 21:13:48,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-19 21:13:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-07-19 21:13:48,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-19 21:13:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-07-19 21:13:48,847 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 134 [2020-07-19 21:13:48,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:48,847 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-07-19 21:13:48,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-07-19 21:13:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-07-19 21:13:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-19 21:13:48,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:48,848 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:49,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:49,062 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:49,063 INFO L82 PathProgramCache]: Analyzing trace with hash 273809272, now seen corresponding path program 9 times [2020-07-19 21:13:49,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:49,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720615381] [2020-07-19 21:13:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:13:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-19 21:13:51,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720615381] [2020-07-19 21:13:51,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405662063] [2020-07-19 21:13:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:51,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 160 conjunts are in the unsatisfiable core [2020-07-19 21:13:51,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:51,443 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:13:51,444 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:13:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-19 21:13:51,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:51,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 47 [2020-07-19 21:13:51,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842626083] [2020-07-19 21:13:51,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-19 21:13:51,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:51,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-19 21:13:51,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2064, Unknown=0, NotChecked=0, Total=2162 [2020-07-19 21:13:51,676 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 47 states. [2020-07-19 21:13:54,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:54,594 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-07-19 21:13:54,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-19 21:13:54,597 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 141 [2020-07-19 21:13:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:54,599 INFO L225 Difference]: With dead ends: 138 [2020-07-19 21:13:54,599 INFO L226 Difference]: Without dead ends: 134 [2020-07-19 21:13:54,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=252, Invalid=6888, Unknown=0, NotChecked=0, Total=7140 [2020-07-19 21:13:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-19 21:13:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2020-07-19 21:13:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-19 21:13:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-07-19 21:13:54,607 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 141 [2020-07-19 21:13:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:54,608 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-07-19 21:13:54,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-19 21:13:54,608 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-07-19 21:13:54,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-19 21:13:54,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:54,609 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:54,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-19 21:13:54,813 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:54,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1983154945, now seen corresponding path program 9 times [2020-07-19 21:13:54,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:54,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442348746] [2020-07-19 21:13:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:13:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-07-19 21:13:57,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442348746] [2020-07-19 21:13:57,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874600129] [2020-07-19 21:13:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:57,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 128 conjunts are in the unsatisfiable core [2020-07-19 21:13:57,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:14:00,443 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:14:00,444 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:14:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-07-19 21:14:00,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:14:00,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 86 [2020-07-19 21:14:00,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052971184] [2020-07-19 21:14:00,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-07-19 21:14:00,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:14:00,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-07-19 21:14:00,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7100, Unknown=0, NotChecked=0, Total=7310 [2020-07-19 21:14:00,707 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 86 states. [2020-07-19 21:14:05,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:14:05,856 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-07-19 21:14:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-19 21:14:05,856 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 148 [2020-07-19 21:14:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:14:05,858 INFO L225 Difference]: With dead ends: 144 [2020-07-19 21:14:05,858 INFO L226 Difference]: Without dead ends: 140 [2020-07-19 21:14:05,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=410, Invalid=15340, Unknown=0, NotChecked=0, Total=15750 [2020-07-19 21:14:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-19 21:14:05,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-07-19 21:14:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-19 21:14:05,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-07-19 21:14:05,865 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 148 [2020-07-19 21:14:05,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:14:05,865 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-07-19 21:14:05,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-07-19 21:14:05,866 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-07-19 21:14:05,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-07-19 21:14:05,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:14:05,867 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:14:06,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-19 21:14:06,073 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:14:06,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:14:06,074 INFO L82 PathProgramCache]: Analyzing trace with hash -708738788, now seen corresponding path program 10 times [2020-07-19 21:14:06,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:14:06,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546905079] [2020-07-19 21:14:06,075 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:14:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-07-19 21:14:08,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546905079] [2020-07-19 21:14:08,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38078660] [2020-07-19 21:14:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:14:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:08,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 176 conjunts are in the unsatisfiable core [2020-07-19 21:14:08,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:14:08,888 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:14:08,889 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:14:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-07-19 21:14:09,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:14:09,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 51 [2020-07-19 21:14:09,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016415864] [2020-07-19 21:14:09,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-19 21:14:09,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:14:09,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-19 21:14:09,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2444, Unknown=0, NotChecked=0, Total=2550 [2020-07-19 21:14:09,106 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 51 states. [2020-07-19 21:14:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:14:12,655 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2020-07-19 21:14:12,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-19 21:14:12,657 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 155 [2020-07-19 21:14:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:14:12,659 INFO L225 Difference]: With dead ends: 150 [2020-07-19 21:14:12,659 INFO L226 Difference]: Without dead ends: 146 [2020-07-19 21:14:12,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=276, Invalid=8280, Unknown=0, NotChecked=0, Total=8556 [2020-07-19 21:14:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-19 21:14:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 87. [2020-07-19 21:14:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-19 21:14:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-07-19 21:14:12,665 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 155 [2020-07-19 21:14:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:14:12,666 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-07-19 21:14:12,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-19 21:14:12,666 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-07-19 21:14:12,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-07-19 21:14:12,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:14:12,667 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:14:12,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-19 21:14:12,881 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:14:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:14:12,882 INFO L82 PathProgramCache]: Analyzing trace with hash -448788065, now seen corresponding path program 10 times [2020-07-19 21:14:12,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:14:12,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730913549] [2020-07-19 21:14:12,883 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:14:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-07-19 21:14:15,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730913549] [2020-07-19 21:14:15,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869495923] [2020-07-19 21:14:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:14:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 140 conjunts are in the unsatisfiable core [2020-07-19 21:14:15,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:14:19,420 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:14:19,421 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:14:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-07-19 21:14:19,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:14:19,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 94 [2020-07-19 21:14:19,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991775636] [2020-07-19 21:14:19,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-07-19 21:14:19,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:14:19,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-07-19 21:14:19,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=8512, Unknown=0, NotChecked=0, Total=8742 [2020-07-19 21:14:19,701 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 94 states. [2020-07-19 21:14:25,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:14:25,848 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2020-07-19 21:14:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-19 21:14:25,849 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 162 [2020-07-19 21:14:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:14:25,850 INFO L225 Difference]: With dead ends: 156 [2020-07-19 21:14:25,850 INFO L226 Difference]: Without dead ends: 152 [2020-07-19 21:14:25,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=450, Invalid=18456, Unknown=0, NotChecked=0, Total=18906 [2020-07-19 21:14:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-19 21:14:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-07-19 21:14:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-19 21:14:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-07-19 21:14:25,856 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 162 [2020-07-19 21:14:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:14:25,856 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-07-19 21:14:25,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-07-19 21:14:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-07-19 21:14:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-07-19 21:14:25,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:14:25,857 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:14:26,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-07-19 21:14:26,068 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:14:26,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:14:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1407042496, now seen corresponding path program 11 times [2020-07-19 21:14:26,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:14:26,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928638932] [2020-07-19 21:14:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:14:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-19 21:14:29,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928638932] [2020-07-19 21:14:29,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562506600] [2020-07-19 21:14:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:14:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:29,142 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 192 conjunts are in the unsatisfiable core [2020-07-19 21:14:29,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:14:29,414 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:14:29,414 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:14:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-19 21:14:29,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:14:29,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 55 [2020-07-19 21:14:29,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923379844] [2020-07-19 21:14:29,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-19 21:14:29,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:14:29,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-19 21:14:29,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2856, Unknown=0, NotChecked=0, Total=2970 [2020-07-19 21:14:29,667 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 55 states. [2020-07-19 21:14:33,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:14:33,807 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-07-19 21:14:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-07-19 21:14:33,808 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 169 [2020-07-19 21:14:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:14:33,809 INFO L225 Difference]: With dead ends: 162 [2020-07-19 21:14:33,809 INFO L226 Difference]: Without dead ends: 158 [2020-07-19 21:14:33,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=300, Invalid=9800, Unknown=0, NotChecked=0, Total=10100 [2020-07-19 21:14:33,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-19 21:14:33,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 93. [2020-07-19 21:14:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-19 21:14:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-07-19 21:14:33,815 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 169 [2020-07-19 21:14:33,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:14:33,816 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-07-19 21:14:33,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-19 21:14:33,816 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-07-19 21:14:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-07-19 21:14:33,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:14:33,817 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:14:34,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-19 21:14:34,029 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:14:34,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:14:34,030 INFO L82 PathProgramCache]: Analyzing trace with hash 491557311, now seen corresponding path program 11 times [2020-07-19 21:14:34,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:14:34,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574376471] [2020-07-19 21:14:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:14:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-07-19 21:14:37,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574376471] [2020-07-19 21:14:37,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465352716] [2020-07-19 21:14:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:14:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:37,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 152 conjunts are in the unsatisfiable core [2020-07-19 21:14:37,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:14:41,980 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:14:41,981 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:14:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-07-19 21:14:42,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:14:42,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 102 [2020-07-19 21:14:42,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242687121] [2020-07-19 21:14:42,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-07-19 21:14:42,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:14:42,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-07-19 21:14:42,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=10052, Unknown=0, NotChecked=0, Total=10302 [2020-07-19 21:14:42,296 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 102 states. [2020-07-19 21:14:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:14:49,807 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2020-07-19 21:14:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-19 21:14:49,807 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 176 [2020-07-19 21:14:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:14:49,808 INFO L225 Difference]: With dead ends: 168 [2020-07-19 21:14:49,808 INFO L226 Difference]: Without dead ends: 164 [2020-07-19 21:14:49,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=490, Invalid=21860, Unknown=0, NotChecked=0, Total=22350 [2020-07-19 21:14:49,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-19 21:14:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 96. [2020-07-19 21:14:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-19 21:14:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-07-19 21:14:49,815 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 176 [2020-07-19 21:14:49,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:14:49,816 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-07-19 21:14:49,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-07-19 21:14:49,816 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-07-19 21:14:49,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-07-19 21:14:49,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:14:49,817 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:14:50,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:14:50,031 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:14:50,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:14:50,032 INFO L82 PathProgramCache]: Analyzing trace with hash 308359396, now seen corresponding path program 12 times [2020-07-19 21:14:50,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:14:50,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828220252] [2020-07-19 21:14:50,033 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:14:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-07-19 21:14:53,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828220252] [2020-07-19 21:14:53,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518257807] [2020-07-19 21:14:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:14:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:53,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 208 conjunts are in the unsatisfiable core [2020-07-19 21:14:53,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:14:53,855 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:14:53,855 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:14:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-07-19 21:14:54,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:14:54,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 59 [2020-07-19 21:14:54,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515995977] [2020-07-19 21:14:54,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-19 21:14:54,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:14:54,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-19 21:14:54,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3300, Unknown=0, NotChecked=0, Total=3422 [2020-07-19 21:14:54,110 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 59 states. [2020-07-19 21:14:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:14:59,155 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2020-07-19 21:14:59,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-07-19 21:14:59,156 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 183 [2020-07-19 21:14:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:14:59,158 INFO L225 Difference]: With dead ends: 174 [2020-07-19 21:14:59,158 INFO L226 Difference]: Without dead ends: 170 [2020-07-19 21:14:59,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=324, Invalid=11448, Unknown=0, NotChecked=0, Total=11772 [2020-07-19 21:14:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-19 21:14:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 99. [2020-07-19 21:14:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-19 21:14:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-07-19 21:14:59,165 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 183 [2020-07-19 21:14:59,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:14:59,166 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-07-19 21:14:59,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-19 21:14:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-07-19 21:14:59,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-19 21:14:59,167 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:14:59,167 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:14:59,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-19 21:14:59,379 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:14:59,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:14:59,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1601548961, now seen corresponding path program 12 times [2020-07-19 21:14:59,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:14:59,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542845868] [2020-07-19 21:14:59,380 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:14:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:14:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-07-19 21:15:03,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542845868] [2020-07-19 21:15:03,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88809611] [2020-07-19 21:15:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:15:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:03,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 164 conjunts are in the unsatisfiable core [2020-07-19 21:15:03,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:15:09,270 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:15:09,271 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:15:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-07-19 21:15:09,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:15:09,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 110 [2020-07-19 21:15:09,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227955312] [2020-07-19 21:15:09,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-07-19 21:15:09,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:15:09,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-07-19 21:15:09,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=11720, Unknown=0, NotChecked=0, Total=11990 [2020-07-19 21:15:09,605 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 110 states. [2020-07-19 21:15:18,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:15:18,324 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2020-07-19 21:15:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-07-19 21:15:18,324 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 190 [2020-07-19 21:15:18,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:15:18,326 INFO L225 Difference]: With dead ends: 180 [2020-07-19 21:15:18,326 INFO L226 Difference]: Without dead ends: 176 [2020-07-19 21:15:18,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=530, Invalid=25552, Unknown=0, NotChecked=0, Total=26082 [2020-07-19 21:15:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-19 21:15:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 102. [2020-07-19 21:15:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-19 21:15:18,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-07-19 21:15:18,333 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 190 [2020-07-19 21:15:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:15:18,334 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-07-19 21:15:18,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-07-19 21:15:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-07-19 21:15:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-19 21:15:18,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:15:18,335 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:15:18,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-19 21:15:18,545 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:15:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:15:18,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1837932792, now seen corresponding path program 13 times [2020-07-19 21:15:18,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:15:18,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119726276] [2020-07-19 21:15:18,547 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:15:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-07-19 21:15:22,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119726276] [2020-07-19 21:15:22,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630314356] [2020-07-19 21:15:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:15:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:22,841 WARN L261 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 224 conjunts are in the unsatisfiable core [2020-07-19 21:15:22,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:15:23,179 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:15:23,180 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:15:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-07-19 21:15:23,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:15:23,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 63 [2020-07-19 21:15:23,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469038602] [2020-07-19 21:15:23,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-19 21:15:23,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:15:23,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-19 21:15:23,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3776, Unknown=0, NotChecked=0, Total=3906 [2020-07-19 21:15:23,488 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 63 states. [2020-07-19 21:15:29,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:15:29,610 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2020-07-19 21:15:29,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-07-19 21:15:29,617 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 197 [2020-07-19 21:15:29,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:15:29,618 INFO L225 Difference]: With dead ends: 186 [2020-07-19 21:15:29,619 INFO L226 Difference]: Without dead ends: 182 [2020-07-19 21:15:29,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=348, Invalid=13224, Unknown=0, NotChecked=0, Total=13572 [2020-07-19 21:15:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-19 21:15:29,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 105. [2020-07-19 21:15:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-19 21:15:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-07-19 21:15:29,626 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 197 [2020-07-19 21:15:29,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:15:29,626 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-07-19 21:15:29,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-19 21:15:29,627 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-07-19 21:15:29,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-07-19 21:15:29,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:15:29,628 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:15:29,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:15:29,843 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:15:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:15:29,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1277526913, now seen corresponding path program 13 times [2020-07-19 21:15:29,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:15:29,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906889851] [2020-07-19 21:15:29,845 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:15:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-07-19 21:15:34,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906889851] [2020-07-19 21:15:34,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262249588] [2020-07-19 21:15:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:15:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 176 conjunts are in the unsatisfiable core [2020-07-19 21:15:34,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:15:41,621 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:15:41,621 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:15:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-07-19 21:15:41,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:15:41,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 118 [2020-07-19 21:15:41,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903947838] [2020-07-19 21:15:41,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-07-19 21:15:41,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:15:41,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-07-19 21:15:41,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=13516, Unknown=0, NotChecked=0, Total=13806 [2020-07-19 21:15:41,988 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 118 states. [2020-07-19 21:15:52,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:15:52,766 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-07-19 21:15:52,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-07-19 21:15:52,767 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 204 [2020-07-19 21:15:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:15:52,771 INFO L225 Difference]: With dead ends: 192 [2020-07-19 21:15:52,772 INFO L226 Difference]: Without dead ends: 188 [2020-07-19 21:15:52,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3305 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=570, Invalid=29532, Unknown=0, NotChecked=0, Total=30102 [2020-07-19 21:15:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-19 21:15:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 108. [2020-07-19 21:15:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-19 21:15:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-07-19 21:15:52,779 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 204 [2020-07-19 21:15:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:15:52,779 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-07-19 21:15:52,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-07-19 21:15:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-07-19 21:15:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-07-19 21:15:52,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:15:52,781 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:15:52,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:15:52,994 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:15:52,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:15:52,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1565902508, now seen corresponding path program 14 times [2020-07-19 21:15:52,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:15:52,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36956080] [2020-07-19 21:15:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:15:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-07-19 21:15:58,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36956080] [2020-07-19 21:15:58,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207028525] [2020-07-19 21:15:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:15:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:15:58,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 240 conjunts are in the unsatisfiable core [2020-07-19 21:15:58,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:15:58,516 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:15:58,517 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:15:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-07-19 21:15:58,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:15:58,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 67 [2020-07-19 21:15:58,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885604096] [2020-07-19 21:15:58,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-19 21:15:58,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:15:58,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-19 21:15:58,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4284, Unknown=0, NotChecked=0, Total=4422 [2020-07-19 21:15:58,819 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 67 states. [2020-07-19 21:16:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:16:05,974 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2020-07-19 21:16:05,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-07-19 21:16:05,975 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 211 [2020-07-19 21:16:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:16:05,978 INFO L225 Difference]: With dead ends: 198 [2020-07-19 21:16:05,978 INFO L226 Difference]: Without dead ends: 194 [2020-07-19 21:16:05,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=372, Invalid=15128, Unknown=0, NotChecked=0, Total=15500 [2020-07-19 21:16:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-19 21:16:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 111. [2020-07-19 21:16:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-19 21:16:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-07-19 21:16:05,985 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 211 [2020-07-19 21:16:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:16:05,985 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-07-19 21:16:05,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-19 21:16:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-07-19 21:16:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-19 21:16:05,987 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:16:05,987 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:16:06,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-07-19 21:16:06,203 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:16:06,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:16:06,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1516658463, now seen corresponding path program 14 times [2020-07-19 21:16:06,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:16:06,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571353442] [2020-07-19 21:16:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:16:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-07-19 21:16:11,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571353442] [2020-07-19 21:16:11,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806144627] [2020-07-19 21:16:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:16:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:11,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 188 conjunts are in the unsatisfiable core [2020-07-19 21:16:11,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:16:20,213 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:16:20,214 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:16:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-07-19 21:16:20,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:16:20,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 126 [2020-07-19 21:16:20,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872548834] [2020-07-19 21:16:20,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2020-07-19 21:16:20,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:16:20,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2020-07-19 21:16:20,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=15440, Unknown=0, NotChecked=0, Total=15750 [2020-07-19 21:16:20,629 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 126 states. [2020-07-19 21:16:33,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:16:33,991 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2020-07-19 21:16:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-19 21:16:33,991 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 218 [2020-07-19 21:16:33,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:16:33,993 INFO L225 Difference]: With dead ends: 204 [2020-07-19 21:16:33,993 INFO L226 Difference]: Without dead ends: 200 [2020-07-19 21:16:33,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=610, Invalid=33800, Unknown=0, NotChecked=0, Total=34410 [2020-07-19 21:16:33,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-19 21:16:33,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 114. [2020-07-19 21:16:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-19 21:16:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-07-19 21:16:34,000 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 218 [2020-07-19 21:16:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:16:34,001 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-07-19 21:16:34,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 126 states. [2020-07-19 21:16:34,001 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-07-19 21:16:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-07-19 21:16:34,002 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:16:34,002 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:16:34,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:16:34,216 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:16:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:16:34,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1728931792, now seen corresponding path program 15 times [2020-07-19 21:16:34,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:16:34,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604126437] [2020-07-19 21:16:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:16:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:39,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-07-19 21:16:40,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604126437] [2020-07-19 21:16:40,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395439755] [2020-07-19 21:16:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:16:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:40,641 WARN L261 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 256 conjunts are in the unsatisfiable core [2020-07-19 21:16:40,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:16:41,070 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:16:41,070 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:16:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-07-19 21:16:41,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:16:41,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 71 [2020-07-19 21:16:41,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061177296] [2020-07-19 21:16:41,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-07-19 21:16:41,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:16:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-07-19 21:16:41,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=4824, Unknown=0, NotChecked=0, Total=4970 [2020-07-19 21:16:41,416 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 71 states. [2020-07-19 21:16:50,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:16:50,471 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2020-07-19 21:16:50,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-07-19 21:16:50,472 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 225 [2020-07-19 21:16:50,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:16:50,474 INFO L225 Difference]: With dead ends: 210 [2020-07-19 21:16:50,474 INFO L226 Difference]: Without dead ends: 206 [2020-07-19 21:16:50,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=396, Invalid=17160, Unknown=0, NotChecked=0, Total=17556 [2020-07-19 21:16:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-19 21:16:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 117. [2020-07-19 21:16:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-19 21:16:50,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2020-07-19 21:16:50,480 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 225 [2020-07-19 21:16:50,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:16:50,481 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2020-07-19 21:16:50,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-07-19 21:16:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2020-07-19 21:16:50,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-07-19 21:16:50,482 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:16:50,483 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:16:50,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-07-19 21:16:50,698 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:16:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:16:50,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1113639617, now seen corresponding path program 15 times [2020-07-19 21:16:50,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:16:50,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547293310] [2020-07-19 21:16:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:16:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2020-07-19 21:16:57,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547293310] [2020-07-19 21:16:57,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740111659] [2020-07-19 21:16:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:16:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:16:57,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 200 conjunts are in the unsatisfiable core [2020-07-19 21:16:57,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:17:08,153 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:17:08,153 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:17:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2020-07-19 21:17:08,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:17:08,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 134 [2020-07-19 21:17:08,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215337192] [2020-07-19 21:17:08,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2020-07-19 21:17:08,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:17:08,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2020-07-19 21:17:08,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=17492, Unknown=0, NotChecked=0, Total=17822 [2020-07-19 21:17:08,651 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 134 states. [2020-07-19 21:17:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:17:26,386 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2020-07-19 21:17:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-07-19 21:17:26,386 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 232 [2020-07-19 21:17:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:17:26,388 INFO L225 Difference]: With dead ends: 216 [2020-07-19 21:17:26,388 INFO L226 Difference]: Without dead ends: 212 [2020-07-19 21:17:26,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4289 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=650, Invalid=38356, Unknown=0, NotChecked=0, Total=39006 [2020-07-19 21:17:26,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-19 21:17:26,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 120. [2020-07-19 21:17:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-19 21:17:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-07-19 21:17:26,396 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 232 [2020-07-19 21:17:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:17:26,396 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-07-19 21:17:26,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 134 states. [2020-07-19 21:17:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-07-19 21:17:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-07-19 21:17:26,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:17:26,398 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:17:26,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:17:26,609 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:17:26,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:17:26,610 INFO L82 PathProgramCache]: Analyzing trace with hash 44515956, now seen corresponding path program 16 times [2020-07-19 21:17:26,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:17:26,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993082342] [2020-07-19 21:17:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:17:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2020-07-19 21:17:34,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993082342] [2020-07-19 21:17:34,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923010240] [2020-07-19 21:17:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:17:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:34,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 272 conjunts are in the unsatisfiable core [2020-07-19 21:17:34,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:17:35,622 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:17:35,623 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:17:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2020-07-19 21:17:36,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:17:36,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 75 [2020-07-19 21:17:36,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582627247] [2020-07-19 21:17:36,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-19 21:17:36,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:17:36,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-19 21:17:36,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5396, Unknown=0, NotChecked=0, Total=5550 [2020-07-19 21:17:36,301 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 75 states. [2020-07-19 21:17:48,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:17:48,987 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-07-19 21:17:48,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-19 21:17:48,988 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 239 [2020-07-19 21:17:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:17:48,990 INFO L225 Difference]: With dead ends: 222 [2020-07-19 21:17:48,990 INFO L226 Difference]: Without dead ends: 218 [2020-07-19 21:17:48,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=420, Invalid=19320, Unknown=0, NotChecked=0, Total=19740 [2020-07-19 21:17:48,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-19 21:17:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 123. [2020-07-19 21:17:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-19 21:17:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-07-19 21:17:48,997 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 239 [2020-07-19 21:17:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:17:48,997 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-07-19 21:17:48,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-19 21:17:48,997 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-07-19 21:17:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-07-19 21:17:48,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:17:48,998 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:17:49,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-07-19 21:17:49,200 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:17:49,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:17:49,201 INFO L82 PathProgramCache]: Analyzing trace with hash 356400863, now seen corresponding path program 16 times [2020-07-19 21:17:49,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:17:49,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881796344] [2020-07-19 21:17:49,202 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:17:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2020-07-19 21:17:57,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881796344] [2020-07-19 21:17:57,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099273308] [2020-07-19 21:17:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:17:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:17:57,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 212 conjunts are in the unsatisfiable core [2020-07-19 21:17:57,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:18:11,513 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:18:11,514 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:18:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2020-07-19 21:18:12,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:18:12,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 74] total 142 [2020-07-19 21:18:12,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643869525] [2020-07-19 21:18:12,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2020-07-19 21:18:12,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:18:12,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2020-07-19 21:18:12,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=19672, Unknown=0, NotChecked=0, Total=20022 [2020-07-19 21:18:12,100 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 142 states. [2020-07-19 21:18:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:18:33,538 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2020-07-19 21:18:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-07-19 21:18:33,538 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 246 [2020-07-19 21:18:33,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:18:33,540 INFO L225 Difference]: With dead ends: 228 [2020-07-19 21:18:33,540 INFO L226 Difference]: Without dead ends: 224 [2020-07-19 21:18:33,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 245 SyntacticMatches, 2 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4692 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=690, Invalid=43200, Unknown=0, NotChecked=0, Total=43890 [2020-07-19 21:18:33,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-07-19 21:18:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 126. [2020-07-19 21:18:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-19 21:18:33,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-07-19 21:18:33,548 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 246 [2020-07-19 21:18:33,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:18:33,548 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-07-19 21:18:33,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 142 states. [2020-07-19 21:18:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-07-19 21:18:33,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-07-19 21:18:33,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:18:33,550 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:18:33,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-19 21:18:33,764 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:18:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:18:33,764 INFO L82 PathProgramCache]: Analyzing trace with hash -29862248, now seen corresponding path program 17 times [2020-07-19 21:18:33,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:18:33,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056216134] [2020-07-19 21:18:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:18:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2020-07-19 21:18:43,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056216134] [2020-07-19 21:18:43,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45737394] [2020-07-19 21:18:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:18:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:43,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 288 conjunts are in the unsatisfiable core [2020-07-19 21:18:43,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:18:43,827 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:18:43,827 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:18:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2020-07-19 21:18:44,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:18:44,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 79 [2020-07-19 21:18:44,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346374243] [2020-07-19 21:18:44,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-07-19 21:18:44,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:18:44,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-07-19 21:18:44,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=6000, Unknown=0, NotChecked=0, Total=6162 [2020-07-19 21:18:44,306 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 79 states. [2020-07-19 21:18:59,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:18:59,137 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2020-07-19 21:18:59,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-07-19 21:18:59,139 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 253 [2020-07-19 21:18:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:18:59,141 INFO L225 Difference]: With dead ends: 234 [2020-07-19 21:18:59,142 INFO L226 Difference]: Without dead ends: 230 [2020-07-19 21:18:59,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2773 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=444, Invalid=21608, Unknown=0, NotChecked=0, Total=22052 [2020-07-19 21:18:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-19 21:18:59,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 129. [2020-07-19 21:18:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-19 21:18:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2020-07-19 21:18:59,149 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 253 [2020-07-19 21:18:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:18:59,150 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2020-07-19 21:18:59,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-07-19 21:18:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2020-07-19 21:18:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-07-19 21:18:59,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:18:59,152 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:18:59,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-19 21:18:59,365 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:18:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:18:59,365 INFO L82 PathProgramCache]: Analyzing trace with hash 256162815, now seen corresponding path program 17 times [2020-07-19 21:18:59,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:18:59,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557353181] [2020-07-19 21:18:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:18:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:18:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2020-07-19 21:19:09,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557353181] [2020-07-19 21:19:09,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191335596] [2020-07-19 21:19:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:19:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:19:09,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 224 conjunts are in the unsatisfiable core [2020-07-19 21:19:09,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:19:28,004 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:19:28,005 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:19:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2020-07-19 21:19:28,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:19:28,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 150 [2020-07-19 21:19:28,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119344370] [2020-07-19 21:19:28,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2020-07-19 21:19:28,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:19:28,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2020-07-19 21:19:28,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=21980, Unknown=0, NotChecked=0, Total=22350 [2020-07-19 21:19:28,778 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 150 states. [2020-07-19 21:19:59,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:19:59,930 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2020-07-19 21:19:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-07-19 21:19:59,930 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 260 [2020-07-19 21:19:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:19:59,932 INFO L225 Difference]: With dead ends: 240 [2020-07-19 21:19:59,932 INFO L226 Difference]: Without dead ends: 236 [2020-07-19 21:19:59,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5401 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=730, Invalid=48332, Unknown=0, NotChecked=0, Total=49062 [2020-07-19 21:19:59,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-19 21:19:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 132. [2020-07-19 21:19:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-19 21:19:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-07-19 21:19:59,939 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 260 [2020-07-19 21:19:59,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:19:59,940 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-07-19 21:19:59,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 150 states. [2020-07-19 21:19:59,940 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-07-19 21:19:59,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-07-19 21:19:59,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:19:59,942 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:20:00,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-19 21:20:00,155 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:20:00,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:20:00,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1054712892, now seen corresponding path program 18 times [2020-07-19 21:20:00,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:20:00,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85158675] [2020-07-19 21:20:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:20:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:00,350 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2020-07-19 21:20:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-19 21:20:13,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85158675] [2020-07-19 21:20:13,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545648265] [2020-07-19 21:20:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:20:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:13,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 304 conjunts are in the unsatisfiable core [2020-07-19 21:20:13,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:20:13,976 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:20:13,977 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:20:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-19 21:20:14,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:20:14,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 83 [2020-07-19 21:20:14,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911096708] [2020-07-19 21:20:14,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-07-19 21:20:14,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:20:14,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-07-19 21:20:14,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=6636, Unknown=0, NotChecked=0, Total=6806 [2020-07-19 21:20:14,631 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 83 states. [2020-07-19 21:20:37,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:20:37,573 INFO L93 Difference]: Finished difference Result 246 states and 248 transitions. [2020-07-19 21:20:37,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-07-19 21:20:37,578 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 267 [2020-07-19 21:20:37,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:20:37,579 INFO L225 Difference]: With dead ends: 246 [2020-07-19 21:20:37,579 INFO L226 Difference]: Without dead ends: 242 [2020-07-19 21:20:37,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3079 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=468, Invalid=24024, Unknown=0, NotChecked=0, Total=24492 [2020-07-19 21:20:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-19 21:20:37,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 135. [2020-07-19 21:20:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-07-19 21:20:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2020-07-19 21:20:37,588 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 267 [2020-07-19 21:20:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:20:37,588 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2020-07-19 21:20:37,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-07-19 21:20:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2020-07-19 21:20:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-07-19 21:20:37,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:20:37,590 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:20:37,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-19 21:20:37,802 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:20:37,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:20:37,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1208226657, now seen corresponding path program 18 times [2020-07-19 21:20:37,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:20:37,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282726134] [2020-07-19 21:20:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:20:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-07-19 21:20:51,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282726134] [2020-07-19 21:20:51,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283673810] [2020-07-19 21:20:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:20:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:20:51,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 236 conjunts are in the unsatisfiable core [2020-07-19 21:20:51,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:21:20,030 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:21:20,031 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:21:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-07-19 21:21:20,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:21:20,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 158 [2020-07-19 21:21:20,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38753903] [2020-07-19 21:21:20,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2020-07-19 21:21:20,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:21:20,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2020-07-19 21:21:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=24416, Unknown=0, NotChecked=0, Total=24806 [2020-07-19 21:21:20,992 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 158 states. [2020-07-19 21:22:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:22:03,074 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-07-19 21:22:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-07-19 21:22:03,074 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 274 [2020-07-19 21:22:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:22:03,076 INFO L225 Difference]: With dead ends: 252 [2020-07-19 21:22:03,077 INFO L226 Difference]: Without dead ends: 248 [2020-07-19 21:22:03,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6005 ImplicationChecksByTransitivity, 63.9s TimeCoverageRelationStatistics Valid=770, Invalid=53752, Unknown=0, NotChecked=0, Total=54522 [2020-07-19 21:22:03,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-07-19 21:22:03,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 138. [2020-07-19 21:22:03,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-19 21:22:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-07-19 21:22:03,087 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 274 [2020-07-19 21:22:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:22:03,087 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-07-19 21:22:03,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 158 states. [2020-07-19 21:22:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-07-19 21:22:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-07-19 21:22:03,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:22:03,089 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:22:03,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-07-19 21:22:03,303 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:22:03,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:22:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash -591647904, now seen corresponding path program 19 times [2020-07-19 21:22:03,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:22:03,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533113042] [2020-07-19 21:22:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:22:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:03,584 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2020-07-19 21:22:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2020-07-19 21:22:19,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533113042] [2020-07-19 21:22:19,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388401936] [2020-07-19 21:22:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:22:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:19,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 320 conjunts are in the unsatisfiable core [2020-07-19 21:22:19,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:22:20,758 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:22:20,758 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:22:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2020-07-19 21:22:21,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:22:21,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 87 [2020-07-19 21:22:21,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179132679] [2020-07-19 21:22:21,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-07-19 21:22:21,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:22:21,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-07-19 21:22:21,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=7304, Unknown=0, NotChecked=0, Total=7482 [2020-07-19 21:22:21,480 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 87 states. [2020-07-19 21:22:48,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:22:48,258 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2020-07-19 21:22:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-07-19 21:22:48,263 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 281 [2020-07-19 21:22:48,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:22:48,265 INFO L225 Difference]: With dead ends: 258 [2020-07-19 21:22:48,265 INFO L226 Difference]: Without dead ends: 254 [2020-07-19 21:22:48,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3401 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=492, Invalid=26568, Unknown=0, NotChecked=0, Total=27060 [2020-07-19 21:22:48,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-07-19 21:22:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 141. [2020-07-19 21:22:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-19 21:22:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-07-19 21:22:48,272 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 281 [2020-07-19 21:22:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:22:48,273 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-07-19 21:22:48,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-07-19 21:22:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-07-19 21:22:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-07-19 21:22:48,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:22:48,274 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:22:48,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-07-19 21:22:48,479 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:22:48,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:22:48,480 INFO L82 PathProgramCache]: Analyzing trace with hash -504033089, now seen corresponding path program 19 times [2020-07-19 21:22:48,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:22:48,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912335874] [2020-07-19 21:22:48,481 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:22:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:22:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:23:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:23:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:23:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:23:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:23:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:23:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:23:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:23:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:23:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2020-07-19 21:23:06,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912335874] [2020-07-19 21:23:06,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801075244] [2020-07-19 21:23:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:23:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:23:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 248 conjunts are in the unsatisfiable core [2020-07-19 21:23:06,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:23:41,179 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:23:41,180 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:23:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2020-07-19 21:23:42,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:23:42,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 166 [2020-07-19 21:23:42,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219374200] [2020-07-19 21:23:42,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2020-07-19 21:23:42,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:23:42,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2020-07-19 21:23:42,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=26980, Unknown=0, NotChecked=0, Total=27390 [2020-07-19 21:23:42,421 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 166 states. [2020-07-19 21:24:35,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:24:35,577 INFO L93 Difference]: Finished difference Result 264 states and 266 transitions. [2020-07-19 21:24:35,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-07-19 21:24:35,578 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 288 [2020-07-19 21:24:35,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:24:35,580 INFO L225 Difference]: With dead ends: 264 [2020-07-19 21:24:35,580 INFO L226 Difference]: Without dead ends: 260 [2020-07-19 21:24:35,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 287 SyntacticMatches, 2 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6641 ImplicationChecksByTransitivity, 79.5s TimeCoverageRelationStatistics Valid=810, Invalid=59460, Unknown=0, NotChecked=0, Total=60270 [2020-07-19 21:24:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-19 21:24:35,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 144. [2020-07-19 21:24:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-19 21:24:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-07-19 21:24:35,590 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 288 [2020-07-19 21:24:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:24:35,590 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-07-19 21:24:35,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 166 states. [2020-07-19 21:24:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-07-19 21:24:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-07-19 21:24:35,592 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:24:35,592 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:24:35,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:24:35,806 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:24:35,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:24:35,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1090458620, now seen corresponding path program 20 times [2020-07-19 21:24:35,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:24:35,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049976243] [2020-07-19 21:24:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:24:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:36,091 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2020-07-19 21:24:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2020-07-19 21:24:54,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049976243] [2020-07-19 21:24:54,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403036332] [2020-07-19 21:24:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:24:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:24:55,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 336 conjunts are in the unsatisfiable core [2020-07-19 21:24:55,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:24:56,427 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:24:56,427 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-19 21:24:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2020-07-19 21:24:57,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:24:57,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 91 [2020-07-19 21:24:57,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93776816] [2020-07-19 21:24:57,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-07-19 21:24:57,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:24:57,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-07-19 21:24:57,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=8004, Unknown=0, NotChecked=0, Total=8190 [2020-07-19 21:24:57,540 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 91 states. [2020-07-19 21:25:40,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:25:40,270 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2020-07-19 21:25:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-07-19 21:25:40,275 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 295 [2020-07-19 21:25:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:25:40,277 INFO L225 Difference]: With dead ends: 270 [2020-07-19 21:25:40,277 INFO L226 Difference]: Without dead ends: 266 [2020-07-19 21:25:40,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 374 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3739 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=516, Invalid=29240, Unknown=0, NotChecked=0, Total=29756 [2020-07-19 21:25:40,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-07-19 21:25:40,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 147. [2020-07-19 21:25:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-19 21:25:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2020-07-19 21:25:40,284 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 295 [2020-07-19 21:25:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:25:40,285 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2020-07-19 21:25:40,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-07-19 21:25:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2020-07-19 21:25:40,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-07-19 21:25:40,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:25:40,287 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:25:40,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-07-19 21:25:40,501 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:25:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:25:40,502 INFO L82 PathProgramCache]: Analyzing trace with hash 235497567, now seen corresponding path program 20 times [2020-07-19 21:25:40,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:25:40,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130121501] [2020-07-19 21:25:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@20d42ac9 [2020-07-19 21:25:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:25:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat