/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.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:38:02,004 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 03:38:02,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:38:02,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:38:02,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:38:02,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:38:02,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:38:02,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:38:02,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:38:02,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:38:02,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:38:02,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:38:02,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:38:02,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:38:02,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:38:02,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:38:02,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:38:02,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:38:02,053 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 [2020-07-20 03:38:02,069 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:38:02,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:38:02,070 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:38:02,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:38:02,071 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:38:02,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:38:02,071 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:38:02,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:38:02,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:38:02,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:38:02,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:38:02,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:38:02,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:38:02,072 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:38:02,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:38:02,073 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:38:02,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:38:02,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:38:02,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:38:02,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:38:02,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:38:02,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:38:02,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:38:02,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:38:02,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:38:02,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:38:02,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:38:02,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:38:02,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:38:02,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:38:02,354 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:38:02,372 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:38:02,376 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:38:02,377 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:38:02,378 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:38:02,379 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-20 03:38:02,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebbade47d/3e4c7e26dba64433b60643aa9a6ac5c9/FLAG863fc618e [2020-07-20 03:38:02,932 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:38:02,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-20 03:38:02,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebbade47d/3e4c7e26dba64433b60643aa9a6ac5c9/FLAG863fc618e [2020-07-20 03:38:03,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebbade47d/3e4c7e26dba64433b60643aa9a6ac5c9 [2020-07-20 03:38:03,293 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:38:03,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:38:03,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:38:03,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:38:03,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:38:03,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:38:03" (1/1) ... [2020-07-20 03:38:03,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9b6e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:38:03, skipping insertion in model container [2020-07-20 03:38:03,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:38:03" (1/1) ... [2020-07-20 03:38:03,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:38:03,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:38:03,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:38:03,524 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:38:03,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:38:03,567 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:38:03,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:38:03 WrapperNode [2020-07-20 03:38:03,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:38:03,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:38:03,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:38:03,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:38:03,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:38:03" (1/1) ... [2020-07-20 03:38:03,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:38:03" (1/1) ... [2020-07-20 03:38:03,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:38:03" (1/1) ... [2020-07-20 03:38:03,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:38:03" (1/1) ... [2020-07-20 03:38:03,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:38:03" (1/1) ... [2020-07-20 03:38:03,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:38:03" (1/1) ... [2020-07-20 03:38:03,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:38:03" (1/1) ... [2020-07-20 03:38:03,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:38:03,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:38:03,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:38:03,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:38:03,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:38:03" (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 [2020-07-20 03:38:03,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:38:03,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:38:03,794 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-20 03:38:03,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:38:03,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:38:03,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:38:03,796 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 03:38:03,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 03:38:03,796 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:38:03,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 03:38:03,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 03:38:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 03:38:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:38:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:38:04,121 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:38:04,121 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 03:38:04,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:38:04 BoogieIcfgContainer [2020-07-20 03:38:04,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:38:04,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:38:04,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:38:04,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:38:04,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:38:03" (1/3) ... [2020-07-20 03:38:04,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97cdb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:38:04, skipping insertion in model container [2020-07-20 03:38:04,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:38:03" (2/3) ... [2020-07-20 03:38:04,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97cdb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:38:04, skipping insertion in model container [2020-07-20 03:38:04,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:38:04" (3/3) ... [2020-07-20 03:38:04,135 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-07-20 03:38:04,145 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:38:04,153 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:38:04,169 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:38:04,188 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:38:04,189 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:38:04,189 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:38:04,189 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:38:04,189 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:38:04,189 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:38:04,189 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:38:04,189 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:38:04,207 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-20 03:38:04,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 03:38:04,212 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:04,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:04,214 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:04,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:04,220 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-07-20 03:38:04,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:04,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735857450] [2020-07-20 03:38:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:04,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735857450] [2020-07-20 03:38:04,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:38:04,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:38:04,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635092274] [2020-07-20 03:38:04,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:38:04,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:04,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:38:04,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:38:04,484 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-07-20 03:38:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:04,585 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-20 03:38:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:38:04,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 03:38:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:04,599 INFO L225 Difference]: With dead ends: 42 [2020-07-20 03:38:04,600 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 03:38:04,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:38:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 03:38:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 03:38:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 03:38:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-20 03:38:04,652 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-20 03:38:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:04,652 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-20 03:38:04,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:38:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-20 03:38:04,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 03:38:04,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:04,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:04,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:38:04,655 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:04,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-07-20 03:38:04,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:04,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214789310] [2020-07-20 03:38:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:04,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214789310] [2020-07-20 03:38:04,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:38:04,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 03:38:04,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076452294] [2020-07-20 03:38:04,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 03:38:04,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:04,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 03:38:04,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 03:38:04,753 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-07-20 03:38:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:04,811 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-07-20 03:38:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 03:38:04,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-07-20 03:38:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:04,813 INFO L225 Difference]: With dead ends: 34 [2020-07-20 03:38:04,813 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 03:38:04,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 03:38:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 03:38:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-20 03:38:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 03:38:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 03:38:04,824 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-07-20 03:38:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:04,824 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 03:38:04,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 03:38:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 03:38:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 03:38:04,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:04,826 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] [2020-07-20 03:38:04,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:38:04,827 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-07-20 03:38:04,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:04,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630866017] [2020-07-20 03:38:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:04,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630866017] [2020-07-20 03:38:04,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832345413] [2020-07-20 03:38:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7421e0ff 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 [2020-07-20 03:38:05,054 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7421e0ff issued 3 check-sat command(s) [2020-07-20 03:38:05,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:38:05,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 03:38:05,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:38:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:05,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:38:05,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-20 03:38:05,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539265389] [2020-07-20 03:38:05,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 03:38:05,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:05,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 03:38:05,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:38:05,110 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-07-20 03:38:05,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:05,179 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-07-20 03:38:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:38:05,180 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-20 03:38:05,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:05,181 INFO L225 Difference]: With dead ends: 36 [2020-07-20 03:38:05,182 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 03:38:05,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:38:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 03:38:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-20 03:38:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 03:38:05,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-20 03:38:05,190 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-07-20 03:38:05,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:05,191 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-20 03:38:05,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 03:38:05,191 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-20 03:38:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 03:38:05,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:05,192 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] [2020-07-20 03:38:05,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 03:38:05,407 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:05,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:05,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-07-20 03:38:05,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:05,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326989308] [2020-07-20 03:38:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:05,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326989308] [2020-07-20 03:38:05,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425381860] [2020-07-20 03:38:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46bd0378 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:38:05,617 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46bd0378 issued 3 check-sat command(s) [2020-07-20 03:38:05,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:38:05,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 03:38:05,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:38:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:05,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:38:05,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-20 03:38:05,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883026479] [2020-07-20 03:38:05,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:38:05,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:05,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:38:05,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:38:05,643 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-07-20 03:38:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:05,702 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-07-20 03:38:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 03:38:05,703 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-20 03:38:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:05,704 INFO L225 Difference]: With dead ends: 38 [2020-07-20 03:38:05,704 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 03:38:05,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:38:05,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 03:38:05,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-07-20 03:38:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 03:38:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-07-20 03:38:05,711 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-07-20 03:38:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:05,712 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-07-20 03:38:05,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:38:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-07-20 03:38:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 03:38:05,713 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:05,713 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:05,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:38:05,929 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:05,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-07-20 03:38:05,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:05,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718410288] [2020-07-20 03:38:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:06,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718410288] [2020-07-20 03:38:06,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865427854] [2020-07-20 03:38:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72cc736f 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 [2020-07-20 03:38:06,095 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72cc736f issued 3 check-sat command(s) [2020-07-20 03:38:06,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:38:06,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 03:38:06,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:38:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:06,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:38:06,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-20 03:38:06,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539486795] [2020-07-20 03:38:06,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:38:06,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:06,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:38:06,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:38:06,123 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-07-20 03:38:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:06,196 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-07-20 03:38:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:38:06,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-07-20 03:38:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:06,198 INFO L225 Difference]: With dead ends: 40 [2020-07-20 03:38:06,198 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 03:38:06,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:38:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 03:38:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-20 03:38:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 03:38:06,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 03:38:06,206 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-07-20 03:38:06,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:06,206 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 03:38:06,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:38:06,207 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 03:38:06,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 03:38:06,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:06,208 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:06,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:38:06,425 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:06,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:06,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-07-20 03:38:06,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:06,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328292555] [2020-07-20 03:38:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:06,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328292555] [2020-07-20 03:38:06,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104860571] [2020-07-20 03:38:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d63f741 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:38:06,719 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d63f741 issued 3 check-sat command(s) [2020-07-20 03:38:06,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:38:06,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:38:06,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:38:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:06,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:38:06,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-20 03:38:06,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521837260] [2020-07-20 03:38:06,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:38:06,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:06,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:38:06,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:38:06,750 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-07-20 03:38:06,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:06,825 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-07-20 03:38:06,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:38:06,827 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 03:38:06,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:06,828 INFO L225 Difference]: With dead ends: 42 [2020-07-20 03:38:06,828 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:38:06,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:38:06,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:38:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-20 03:38:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 03:38:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-20 03:38:06,840 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-07-20 03:38:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:06,840 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-20 03:38:06,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:38:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-20 03:38:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 03:38:06,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:06,842 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:07,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:38:07,059 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:07,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:07,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-07-20 03:38:07,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:07,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070549614] [2020-07-20 03:38:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:07,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070549614] [2020-07-20 03:38:07,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176951868] [2020-07-20 03:38:07,229 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2828e438 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 [2020-07-20 03:38:07,504 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2828e438 issued 3 check-sat command(s) [2020-07-20 03:38:07,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:38:07,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 03:38:07,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:38:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:07,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:38:07,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-07-20 03:38:07,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501418719] [2020-07-20 03:38:07,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:38:07,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:07,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:38:07,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:38:07,533 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2020-07-20 03:38:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:07,609 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-07-20 03:38:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:38:07,609 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-20 03:38:07,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:07,610 INFO L225 Difference]: With dead ends: 44 [2020-07-20 03:38:07,611 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 03:38:07,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:38:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 03:38:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-07-20 03:38:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 03:38:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-07-20 03:38:07,618 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-07-20 03:38:07,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:07,618 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-07-20 03:38:07,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:38:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-07-20 03:38:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 03:38:07,620 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:07,620 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:07,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 03:38:07,835 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:07,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:07,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-07-20 03:38:07,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:07,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108650436] [2020-07-20 03:38:07,838 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:07,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108650436] [2020-07-20 03:38:07,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229748292] [2020-07-20 03:38:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a2db252 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:38:08,259 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a2db252 issued 3 check-sat command(s) [2020-07-20 03:38:08,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:38:08,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:38:08,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:38:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:08,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:38:08,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-07-20 03:38:08,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707481286] [2020-07-20 03:38:08,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:38:08,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:08,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:38:08,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:38:08,287 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 11 states. [2020-07-20 03:38:08,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:08,368 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-07-20 03:38:08,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:38:08,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-20 03:38:08,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:08,370 INFO L225 Difference]: With dead ends: 46 [2020-07-20 03:38:08,370 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 03:38:08,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:38:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 03:38:08,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-20 03:38:08,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 03:38:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 03:38:08,377 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-07-20 03:38:08,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:08,378 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 03:38:08,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:38:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 03:38:08,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 03:38:08,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:08,379 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:08,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:38:08,595 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:08,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:08,596 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-07-20 03:38:08,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:08,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750371751] [2020-07-20 03:38:08,597 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:08,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750371751] [2020-07-20 03:38:08,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073913325] [2020-07-20 03:38:08,700 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e5146d2 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 [2020-07-20 03:38:09,706 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e5146d2 issued 3 check-sat command(s) [2020-07-20 03:38:09,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:38:09,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 03:38:09,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:38:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:09,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:38:09,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-07-20 03:38:09,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378732886] [2020-07-20 03:38:09,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 03:38:09,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:09,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 03:38:09,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:38:09,741 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-20 03:38:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:09,840 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-07-20 03:38:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:38:09,840 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-07-20 03:38:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:09,841 INFO L225 Difference]: With dead ends: 48 [2020-07-20 03:38:09,841 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 03:38:09,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:38:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 03:38:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-20 03:38:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 03:38:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-07-20 03:38:09,848 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-07-20 03:38:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:09,848 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-07-20 03:38:09,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 03:38:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-07-20 03:38:09,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 03:38:09,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:09,849 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:10,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:38:10,058 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:10,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:10,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-07-20 03:38:10,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:10,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848443851] [2020-07-20 03:38:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:10,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848443851] [2020-07-20 03:38:10,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17823870] [2020-07-20 03:38:10,202 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ea81394 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:38:11,573 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ea81394 issued 3 check-sat command(s) [2020-07-20 03:38:11,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:38:11,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:38:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:38:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:11,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:38:11,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-07-20 03:38:11,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326515694] [2020-07-20 03:38:11,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 03:38:11,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:11,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 03:38:11,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:38:11,613 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-07-20 03:38:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:11,698 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-07-20 03:38:11,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 03:38:11,698 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-07-20 03:38:11,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:11,699 INFO L225 Difference]: With dead ends: 50 [2020-07-20 03:38:11,699 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 03:38:11,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:38:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 03:38:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-07-20 03:38:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 03:38:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-07-20 03:38:11,706 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-07-20 03:38:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:11,707 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-07-20 03:38:11,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 03:38:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-07-20 03:38:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 03:38:11,708 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:11,708 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:11,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 03:38:11,910 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:11,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:11,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-07-20 03:38:11,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:11,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066208935] [2020-07-20 03:38:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:12,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066208935] [2020-07-20 03:38:12,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584996375] [2020-07-20 03:38:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f54b50e 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 [2020-07-20 03:38:13,147 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f54b50e issued 3 check-sat command(s) [2020-07-20 03:38:13,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:38:13,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 03:38:13,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:38:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:13,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:38:13,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-07-20 03:38:13,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719238242] [2020-07-20 03:38:13,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 03:38:13,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:13,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 03:38:13,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:38:13,181 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2020-07-20 03:38:13,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:13,280 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-07-20 03:38:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:38:13,281 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-07-20 03:38:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:13,283 INFO L225 Difference]: With dead ends: 52 [2020-07-20 03:38:13,283 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 03:38:13,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:38:13,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 03:38:13,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-20 03:38:13,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 03:38:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 03:38:13,290 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-07-20 03:38:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:13,290 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 03:38:13,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 03:38:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 03:38:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 03:38:13,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:13,292 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:13,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:38:13,501 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:13,502 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-07-20 03:38:13,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:13,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465266490] [2020-07-20 03:38:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:13,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465266490] [2020-07-20 03:38:13,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506717081] [2020-07-20 03:38:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43f79186 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:38:14,756 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43f79186 issued 3 check-sat command(s) [2020-07-20 03:38:14,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:38:14,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:38:14,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:38:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:14,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:38:14,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-07-20 03:38:14,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874759497] [2020-07-20 03:38:14,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:38:14,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:14,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:38:14,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:38:14,797 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-20 03:38:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:14,897 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-07-20 03:38:14,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 03:38:14,898 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-07-20 03:38:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:14,899 INFO L225 Difference]: With dead ends: 54 [2020-07-20 03:38:14,899 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 03:38:14,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:38:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 03:38:14,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 03:38:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 03:38:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-07-20 03:38:14,907 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-07-20 03:38:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:14,908 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-07-20 03:38:14,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:38:14,908 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-07-20 03:38:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 03:38:14,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:14,909 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:15,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:38:15,125 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:15,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:15,126 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-07-20 03:38:15,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:15,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56480090] [2020-07-20 03:38:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:15,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56480090] [2020-07-20 03:38:15,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508433083] [2020-07-20 03:38:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44b15e17 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 [2020-07-20 03:38:17,538 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44b15e17 issued 4 check-sat command(s) [2020-07-20 03:38:17,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:38:17,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 03:38:17,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:38:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:17,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:38:17,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-07-20 03:38:17,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806341785] [2020-07-20 03:38:17,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 03:38:17,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:17,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 03:38:17,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:38:17,589 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2020-07-20 03:38:17,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:17,688 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-07-20 03:38:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 03:38:17,689 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-07-20 03:38:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:17,690 INFO L225 Difference]: With dead ends: 56 [2020-07-20 03:38:17,691 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 03:38:17,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:38:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 03:38:17,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-20 03:38:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 03:38:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-07-20 03:38:17,699 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-07-20 03:38:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:17,700 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-07-20 03:38:17,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 03:38:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-07-20 03:38:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 03:38:17,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:17,701 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:17,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 03:38:17,911 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:17,912 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-07-20 03:38:17,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:17,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860207210] [2020-07-20 03:38:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:18,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860207210] [2020-07-20 03:38:18,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520163113] [2020-07-20 03:38:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6108d248 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:38:24,520 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6108d248 issued 3 check-sat command(s) [2020-07-20 03:38:24,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:38:24,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 03:38:24,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:38:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:24,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:38:24,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-07-20 03:38:24,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933857162] [2020-07-20 03:38:24,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 03:38:24,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:24,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 03:38:24,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:38:24,591 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 17 states. [2020-07-20 03:38:24,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:24,710 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-07-20 03:38:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 03:38:24,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-07-20 03:38:24,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:24,712 INFO L225 Difference]: With dead ends: 58 [2020-07-20 03:38:24,712 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 03:38:24,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:38:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 03:38:24,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-20 03:38:24,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 03:38:24,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 03:38:24,719 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-07-20 03:38:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:24,720 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 03:38:24,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 03:38:24,720 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 03:38:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 03:38:24,721 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:24,721 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:24,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 03:38:24,922 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:24,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:24,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-07-20 03:38:24,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:24,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581774326] [2020-07-20 03:38:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:25,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581774326] [2020-07-20 03:38:25,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506093409] [2020-07-20 03:38:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8087c1f 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 [2020-07-20 03:38:27,772 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8087c1f issued 4 check-sat command(s) [2020-07-20 03:38:27,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:38:27,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 03:38:27,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:38:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:27,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:38:27,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-07-20 03:38:27,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676557741] [2020-07-20 03:38:27,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 03:38:27,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:38:27,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 03:38:27,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:38:27,822 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 18 states. [2020-07-20 03:38:27,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:38:27,963 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-07-20 03:38:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 03:38:27,964 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-07-20 03:38:27,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:38:27,965 INFO L225 Difference]: With dead ends: 60 [2020-07-20 03:38:27,965 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 03:38:27,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:38:27,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 03:38:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-07-20 03:38:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 03:38:27,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-07-20 03:38:27,973 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-07-20 03:38:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:38:27,973 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-07-20 03:38:27,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 03:38:27,974 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-07-20 03:38:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-20 03:38:27,974 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:38:27,975 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:38:28,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-20 03:38:28,183 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:38:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:38:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-07-20 03:38:28,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:38:28,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021658255] [2020-07-20 03:38:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:38:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:38:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:38:28,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021658255] [2020-07-20 03:38:28,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606488146] [2020-07-20 03:38:28,396 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79d2219a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:39:06,030 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79d2219a issued 4 check-sat command(s) [2020-07-20 03:39:06,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:39:06,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 03:39:06,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:39:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:39:06,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:39:06,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-07-20 03:39:06,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453531746] [2020-07-20 03:39:06,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 03:39:06,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:39:06,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 03:39:06,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:39:06,455 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 19 states. [2020-07-20 03:39:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:39:06,571 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-07-20 03:39:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 03:39:06,572 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-07-20 03:39:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:39:06,573 INFO L225 Difference]: With dead ends: 62 [2020-07-20 03:39:06,573 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 03:39:06,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:39:06,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 03:39:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-20 03:39:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 03:39:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-07-20 03:39:06,588 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-07-20 03:39:06,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:39:06,589 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-07-20 03:39:06,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 03:39:06,589 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-07-20 03:39:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 03:39:06,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:39:06,592 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:39:06,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:39:06,793 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:39:06,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:39:06,794 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-07-20 03:39:06,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:39:06,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388813654] [2020-07-20 03:39:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:39:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:39:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:39:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:39:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:39:07,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388813654] [2020-07-20 03:39:07,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341417369] [2020-07-20 03:39:07,004 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dc27ba4 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 [2020-07-20 03:39:17,554 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dc27ba4 issued 4 check-sat command(s) [2020-07-20 03:39:17,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:39:17,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 03:39:17,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:39:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:39:17,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:39:17,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-07-20 03:39:17,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121142224] [2020-07-20 03:39:17,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 03:39:17,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:39:17,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 03:39:17,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:39:17,641 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 20 states. [2020-07-20 03:39:17,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:39:17,775 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-07-20 03:39:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 03:39:17,776 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-07-20 03:39:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:39:17,777 INFO L225 Difference]: With dead ends: 64 [2020-07-20 03:39:17,777 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 03:39:17,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:39:17,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 03:39:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-07-20 03:39:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 03:39:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 03:39:17,784 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-07-20 03:39:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:39:17,784 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 03:39:17,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 03:39:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 03:39:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 03:39:17,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:39:17,785 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:39:17,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 03:39:17,995 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:39:17,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:39:17,996 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-07-20 03:39:17,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:39:17,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132874826] [2020-07-20 03:39:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:39:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:39:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:39:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:39:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:39:18,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132874826] [2020-07-20 03:39:18,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339160923] [2020-07-20 03:39:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f1bb7de No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:40:23,926 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f1bb7de issued 4 check-sat command(s) [2020-07-20 03:40:23,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:40:24,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 03:40:24,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:40:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:40:24,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:40:24,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-07-20 03:40:24,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649796026] [2020-07-20 03:40:24,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 03:40:24,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:40:24,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 03:40:24,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-20 03:40:24,943 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 21 states. [2020-07-20 03:40:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:40:25,029 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-07-20 03:40:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 03:40:25,029 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-07-20 03:40:25,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:40:25,031 INFO L225 Difference]: With dead ends: 66 [2020-07-20 03:40:25,031 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 03:40:25,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-20 03:40:25,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 03:40:25,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-07-20 03:40:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 03:40:25,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-07-20 03:40:25,037 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-07-20 03:40:25,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:40:25,037 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-07-20 03:40:25,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 03:40:25,038 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-07-20 03:40:25,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 03:40:25,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:40:25,039 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:40:25,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 03:40:25,240 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:40:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:40:25,240 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-07-20 03:40:25,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:40:25,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746876112] [2020-07-20 03:40:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:40:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:40:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:40:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:40:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:40:25,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746876112] [2020-07-20 03:40:25,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386833759] [2020-07-20 03:40:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67c6435e 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 [2020-07-20 03:49:08,914 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67c6435e issued 4 check-sat command(s) [2020-07-20 03:49:08,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:49:21,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 03:49:21,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:49:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:49:21,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:49:21,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2020-07-20 03:49:21,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127517218] [2020-07-20 03:49:21,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 03:49:21,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:49:21,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 03:49:21,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-20 03:49:21,448 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2020-07-20 03:49:21,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:49:21,546 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-07-20 03:49:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 03:49:21,546 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-07-20 03:49:21,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:49:21,547 INFO L225 Difference]: With dead ends: 68 [2020-07-20 03:49:21,547 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 03:49:21,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-20 03:49:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 03:49:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-20 03:49:21,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 03:49:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-07-20 03:49:21,554 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-07-20 03:49:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:49:21,555 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-07-20 03:49:21,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 03:49:21,555 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-07-20 03:49:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 03:49:21,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:49:21,557 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:49:21,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:49:21,766 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:49:21,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:49:21,767 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-07-20 03:49:21,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:49:21,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948099895] [2020-07-20 03:49:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:49:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:49:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:49:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:49:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:49:22,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948099895] [2020-07-20 03:49:22,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158210229] [2020-07-20 03:49:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a57924c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:51:29,902 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a57924c issued 4 check-sat command(s) [2020-07-20 03:51:29,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:51:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 03:51:32,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:51:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:51:32,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:51:32,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-07-20 03:51:32,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469534253] [2020-07-20 03:51:32,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 03:51:32,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:51:32,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 03:51:32,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-20 03:51:32,275 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 23 states. [2020-07-20 03:51:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:51:32,396 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-07-20 03:51:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 03:51:32,396 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-07-20 03:51:32,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:51:32,397 INFO L225 Difference]: With dead ends: 70 [2020-07-20 03:51:32,397 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 03:51:32,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-20 03:51:32,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 03:51:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-07-20 03:51:32,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 03:51:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 03:51:32,402 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-07-20 03:51:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:51:32,403 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 03:51:32,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 03:51:32,403 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 03:51:32,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 03:51:32,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:51:32,404 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:51:32,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:51:32,617 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:51:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:51:32,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-07-20 03:51:32,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:51:32,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574130593] [2020-07-20 03:51:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@673e97f [2020-07-20 03:51:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:51:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:51:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:51:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:51:32,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574130593] [2020-07-20 03:51:32,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121623369] [2020-07-20 03:51:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7ce045a4 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